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08-27-2023-1354 - draft (draft, luxury goods, mining railway, ore, merial, sigma, shire, etc.)

Wine and foie gras

In economics, a luxury good (or upmarket good) is a good for which demand increases more than what is proportional as income rises, so that expenditures on the good become a greater proportion of overall spending. Luxury goods are in contrast to necessity goods, where demand increases proportionally less than income.[1] Luxury goods is often used synonymously with superior goods.

Definition and etymology

The word "luxury" derives from the Latin verb luxor meaning to overextend or strain. From this the noun luxuria and verb luxurio developed, "indicating immoderate growth, swelling, ... in persons and animals, willful or unruly behavior, disregard for moral restraints, and licensciousness", and the term has had negative connotations for most of its long history.[2] One definition in the OED is a "thing desirable but not necessary". A luxury good can be identified by comparing the demand for the good at one point in time against the demand for the good at a different point in time, at a different income level. When personal income increases, demand for luxury goods increases even more than income does.

Conversely, when personal income decreases, demand for luxury goods drops even more than income does.[3] For example, if income rises 1%, and the demand for a product rises 2%, then the product is a luxury good. This contrasts with necessity goods, or basic goods, for which demand stays the same or decreases only slightly as income decreases.[3]

Scope of the term

With increasing accessibility to luxury goods,[4] new product categories have been created within the luxury market, called "accessible luxury" or "mass luxury". These are meant specifically for the middle class, sometimes called the "aspiring class" in this context. Because luxury has now diffused into the masses, defining the word has become more difficult.[5]

Whereas luxury often refers to a certain types of products, luxury is not restricted to physical goods; services can also be luxury. Likewise, from the consumer perspective, luxury is an experience that has been defined as "hedonic escapism."[6]

Confusion with normal goods

"Superior goods" is the gradable antonym of "inferior goods". If the quantity of an item demanded increases with income, but not by enough to increase the share of the budget spent on it, then it is only a normal good and is not a superior good. Consumption of all normal goods increases as income increases. For example, if income increases by 50%, then consumption will increase (maybe by only 1%, maybe by 40%, maybe by 70%). A superior good is a normal good for which the proportional consumption increase exceeds the proportional income increase. So, if income increases by 50% then consumption of a superior good will increase by more than 50% (maybe 51%, maybe 70%).

In economics terminology, all goods with an income elasticity of demand greater than zero are "normal", but only the subset having income elasticity of demand > 1 are "superior".[7]

Some articles in the microeconomics discipline use the term superior-good as an alternative to an inferior good, thus making "superior goods" and "normal goods" synonymous. Where this is done, a product making up an increasing share of spending under income increases is often called an ultra-superior good.[citation needed]

Art history

Secular Rococo luxury or treasure binding for a book, using techniques from the making of gold boxes, in gold, mother of pearl and hardstone, Berlin, 1750–1760. By this time such lavish bindings were unusual.

Though often verging on the meaningless in modern marketing, "luxury" remains a legitimate and current technical term in art history for objects that are especially highly decorated to very high standards and use expensive materials. The term is especially used for medieval manuscripts to distinguish between practical working books for normal use, and fully illuminated manuscripts, that were often bound in treasure bindings with metalwork and jewels. These are often much larger, with less text on each page and many illustrations, and if liturgical texts were originally usually kept on the altar or sacristy rather any library that the church or monastery who owned them may have had. Secular luxury manuscripts were commissioned by the very wealthy and differed in the same ways from cheaper books.[8]

"Luxury" and "luxury arts" may be used for other applied arts where both utilitarian and luxury versions of the same types of objects were made. This might cover metalwork, ceramics, glass, arms and armor, and a wide range of objects.[9] It is much less used for objects from the fine arts, with no function beyond being an artwork: paintings, drawings, and sculpture, even though the disparity in cost between an expensive and cheap work may have been as large.[10]

Market

The invention of affordable quartz watches caused mechanical watches to become primarily luxury goods.
Luxury vehicle
Seven different types of caviar
A luxury handbag. While many handbags are valued on their ability to carry objects, designer handbags are valued based on fashion.

Characteristics

Luxury goods have high income elasticity of demand: as people become wealthier, they will buy proportionately more luxury goods. This also means, however, that should there be a decline in income, its demand will drop more than proportionately. The income elasticity of demand is not constant with respect to income and may change signs at different levels of income. That is to say, a luxury good may become a necessity good or even an inferior good at different income levels.

Some luxury products have been claimed to be examples of Veblen goods, with a positive price elasticity of demand: for example, making a perfume more expensive can increase its perceived value as a luxury good to such an extent that sales can go up, rather than down. However, Veblen goods are not synonymous with luxury goods.

Although the technical term luxury good is independent of the goods' quality, they are generally considered to be goods at the highest end of the market in terms of quality and price. Many markets have a luxury segment including, for example, luxury versions of automobiles, yachts, wine, bottled water, coffee, tea, foods, watches, clothes, jewelry, and high fidelity sound equipment.[11] Luxuries may be services. The hiring of full-time or live-in domestic servants is a luxury reflecting disparities of income. Some financial services, especially in some brokerage houses, can be considered luxury services by default because persons in lower-income brackets generally do not use them.

Luxury goods often have special luxury packaging to differentiate the products from mainstream competitors.

Trends

Originally, luxury goods were available only to the very wealthy and "aristocratic world of old money" that offered them a history of tradition, superior quality, along with a pampered buying experience.[12] Luxury goods have been transformed by a shift from custom-made (bespoke) works with exclusive distribution practices by specialized, quality-minded family-run and small businesses to a mass production of specialty branded goods by profit-focused large corporations and marketers.[12] The trend in modern luxury is simply a product or service that is marketed, packaged, and sold by global corporations that are focused "on growth, visibility, brand awareness, advertising, and, above all, profits."[12] Increasingly, luxury logos are now available to all consumers at a premium price across the world including online.[13]

Global consumer companies, such as Procter & Gamble, are also attracted to the industry, due to the difficulty of making a profit in the mass consumer goods market.[14] The customer base for various luxury goods continue to be more culturally diversified, and this presents more unseen challenges and new opportunities to companies in this industry.[15]

There are several trends in luxury:[16]

  • Democratization of luxury. Also known as masstige (from mass-prestige), is a marketing strategy that aims to make brands prestigious while retaining its affordability. [17]
  • Globalization: Consumers in some countries are becoming wealthier, thus new markets are opening for luxury marketers.[18] Reports by consulting agencies like McKinsey predicted that East Asia will become the world’s largest personal luxury goods market, and China will consume half the global market value of luxury goods.[19][20]
  • Consolidation: Consolidation involves the growth of big companies and ownership of brands across many segments of luxury products. Examples include Kering, LVMH, and Richemont, which dominate the market in areas ranging from luxury drinks to fashion and cosmetics.[21]
  • Luxury brand collaborations. This marketing strategy demonstrates the potential of unexpected partnerships and co-branding opportunities between luxury brands and an unconventional partner seemingly at the opposite end of the design spectrum.[20] Collaborations include pairings of luxury brands like Fendi x Versace but also pairings with streetwear brands including skateboarding brand Supreme x LVMH, with celebrities such as Bad Bunny x Adidas, anime characters like Doraemon x Gucci, and now video game franchises like Fortnite x Balenciaga.[22] The collaborations are often limited edition collections.

Size

The luxury goods market has been on an upward climb for many years. Apart from the setback caused by the 1997 Asian Financial Crisis, the industry has performed well, particularly in 2000. In that year, the world luxury goods market was worth close to $170 billion and grew 7.9 percent.[23] The United States has been the largest regional market for luxury goods and is estimated to continue to be the leading personal luxury goods market in 2013, with a value of 62.5 billion euros.[citation needed] The largest sector in this category was luxury drinks, including premium whisky, champagne, and cognac. This sector was the only one that suffered a decline in value (-0.9 percent).[citation needed] The watches and jewelry section showed the strongest performance, growing in value by 23.3 percent, while the clothing and accessories section grew 11.6 percent between 1996 and 2000, to $32.8 billion. The largest ten markets for luxury goods account for 83 percent of overall sales, and include Japan, China, United States, Russia, Germany, Italy, France, United Kingdom, Brazil, Spain, and Switzerland.[citation needed]

In 2012, China surpassed Japan as the world's largest luxury market.[24] China's luxury consumption accounts for over 25% of the global market.[25] According to the Global Wealth and Lifestyle Report 2020, Hong Kong, Shanghai, Tokyo and Singapore were four of the five most expensive cities for luxury goods in Asia.[26] In 2014, the luxury sector was expected to grow over the following 10 years because of 440 million consumers spending a total of 880 billion euros, or $1.2 trillion.[27]

Advertising

The advertising expenditure for the average luxury brand is 5-15% of sales revenue, or about 25% with the inclusion of other communications such as public relations, events, and sponsorships.[28]

A rather small group in comparison, the wealthy tend to be extremely influential.[29] Once a brand gets an "endorsement" from members of this group, then the brand can be defined as a true "luxury" brand. An example of different product lines in the same brand is found in the automotive industry, with "entry-level" cars marketed to younger, less wealthy consumers, and higher-cost models for older and more wealthy consumers.[30]

Economics

In economics, superior goods or luxury goods make up a larger proportion of consumption as income rises, and therefore are a type of normal goods in consumer theory. Such a good must possess two economic characteristics: it must be scarce, and, along with that, it must have a high price.[31] The scarcity of the good can be natural or artificial; however, the general population (i.e., consumers) must recognize the good as distinguishably better. Possession of such a good usually signifies "superiority" in resources, and usually is accompanied by prestige.

A Veblen good is a superior good with a prestige value so high that a price decline might lower demand. Veblen's contribution is demonstrated by the significance of the Veblen effect, which refers to the phenomenon of people purchasing costly items even when more affordable options that provide similar levels of satisfaction are available.[32]

The income elasticity of a superior good is above one by definition, because it raises the expenditure share as income rises. A superior good also may be a luxury good that is not purchased at all below a certain level of income. Examples would include smoked salmon, caviar,[31] and most other delicacies. On the other hand, superior goods may have a wide quality distribution, such as wine and holidays. However, though the number of such goods consumed may stay constant even with rising wealth, the level of spending will go up, to secure a better experience.

A higher income inequality leads to higher consumption of luxury goods because of status anxiety.[33]

Socioeconomic significance

Crown of Empress Farah Pahlavi of Iran

Several manufactured products attain the status of "luxury goods" due to their design, quality, durability, or performance which are superior to the comparable substitutes.[34]

There are also goods that are perceived as luxurious by the public, simply because they play the role of status symbols, as such goods tend to signify the purchasing power of those who acquire them.[citation needed] These items, while not necessarily being better (in quality, performance, or appearance) than their less expensive substitutes, are purchased with the main purpose of displaying wealth or income of their owners.[citation needed] These kinds of goods are the objects of a socio-economic phenomenon called conspicuous consumption and commonly include luxury vehicles, watches, jewelry, designer clothing, yachts, private jets, corporate helicopters as well as large residences, urban mansions, and country houses.[citation needed]

Luxury brands

The idea of a luxury brand is not necessarily a product or a price point, but a mindset where core values that are expressed by a brand are directly connected to the producer's dedication and alignment to perceptions of quality with its customers' values and aspirations.[35] Thus, it is these target customers, not the product, that make a luxury brand.[35] Brands that are considered luxury connect with their customers by communicating that they are at the top of their class or considered the best in their field.[36] Furthermore, these brands must deliver - in some meaningful way - measurably better performance.[36] What consumers perceive as luxurious brands and products change over the years, but there appear to be three main drivers: (1) a high price, especially when compared to other brands within its segment; (2) limited supply, in that a brand may not need to be expensive, but it arguably should not be easily obtainable and contributing to the customers' feeling that they have something special; and (3) endorsement by celebrities, which can make a brand or particular products more appealing for consumers and thus more "luxurious" in their minds.[37] Two additional elements of luxury brands include special packaging and personalization.[37] These differentiating elements distance the brands from the mass market and thus provide them with a unique feeling and user experience as well as a special and memorable "luxury feel" for customers.[37]

Examples include LVMH, the largest luxury goods producer in the world with over fifty brands (including Louis Vuitton)[38] and sales of €42.6 billion in 2017,[39] Kering, which made €15.9 billion in revenue for a net income of €2.3 billion in 2019,[40] and Richemont.

The concept of a luxury brand is now so popular that it is used in almost every retail, manufacturing, and service sector.[41] New marketing concepts such as "mass-luxury" or "hyper luxury" further blur the definition of what is a luxury product, a luxury brand, or a luxury company.[41] Lately, luxury brands extending their reach to young consumers through unconventional luxury brand collaborations in which luxury brands partner with non-luxury brands seemingly at the opposite spectrum of design, image, and value.[20] For example, luxury fashion houses partner with streetwear brands and video games.[42]

Luxury department stores

Most clothing in the world is sold in finished condition in standardized sizes. Luxury stores such as this one produce bespoke clothing—clothing specifically designed for the person buying them.

Since the development of mass-market "luxury" brands in the 1800s. Extraordinary places will be the factor of development that can be achieved by enabling the conversion of items from the mass-market to the luxury market.

Many innovative technologies are being added to mass-market products and then transformed into luxury items to be placed in department stores.[43]

Department stores dedicated to selling all major luxury brands have opened up in most major cities around the world. Le Bon Marché in Paris, France is credited as one of the first of its kind.

In the United States, the development of luxury-oriented department stores not only changed the retail industry, but also ushered the idea of freedom through consumerism, and a new opportunity for middle- and upper-class women.[44]

Luxury shopping districts

Fashion brands within the luxury goods market tend to be concentrated in exclusive or affluent districts of cities around the world. These include:

See also

References

 

  • Varian, Hal (1992). "Choice". Microeconomic Analysis (Third ed.). New York: W.W. Norton. p. 117. ISBN 978-0-393-95735-8. Retrieved 4 October 2019. [...] as the consumer gets more income, he consumes more of both goods but proportionally more of one good (the luxury good) than of the other (the necessary good).

  • Lapatin, 1-2

  • Roberts, David (2020-03-20). "Why rich people use so much more energy". vox.com. Retrieved 2020-03-22.

  • Wong, N.Y.; Ahuvia, A. C. (1998). "Personal taste and family face: Luxury consumption in Confucian and Western societies". Psychology & Marketing. 15 (5): 423–441. doi:10.1002/(SICI)1520-6793(199808)15:5<423::AID-MAR2>3.0.CO;2-9. S2CID 55715301.

  • "What is luxury?". pauravshukla.com. 2010-05-14. Retrieved 2010-08-09.

  • Holmqvist, Jonas; Diaz Ruiz, Carlos; Peñaloza, Lisa (2020-08-01). "Moments of luxury: Hedonic escapism as a luxury experience". Journal of Business Research. 116: 503–513. doi:10.1016/j.jbusres.2019.10.015. S2CID 211427257.

  • "superior good". businessdictionary.com. 2011. Archived from the original on 8 February 2011. Retrieved 3 January 2023.

  • Kren, Thomas, Illuminated Manuscripts of Germany and Central Europe in the J. Paul Getty Museum, 2009, pp. 7-9, J. Paul Getty Museum, ISBN 9780892369485, google books

  • Belozerskaya, Marina, Luxury Arts of the Renaissance, 2005, J. Paul Getty Museum, ISBN 9780892367856, google books; Lapatin, 1-10 (and throughout)

  • Lapatin, 9

  • Kenton, Will. "What Is Luxury Item?". investopedia.com. Retrieved 2019-09-30.

  • Thomas, Dana (2007). Deluxe: How Luxury Lost Its Luster. Penguin. ISBN 9781594201295.

  • Danziger, Pamela N. (26 February 2018). "5 Brands That Reveal The Future Of Luxury Online". Forbes. Retrieved 9 October 2019.

  • "Procter & Gamble Cleans Up With Luxury Paper Towels". bloomberg.com. Retrieved 2018-07-28.

  • Seo, Yuri; Oliver, Margo Buchanan (2015). "Luxury branding: the industry, trends, and future conceptualisations". Asia Pacific Journal of Marketing and Logistics. 27 (1): 82–98. doi:10.1108/APJML-10-2014-0148.

  • "Global Luxury Fashion Industry Analysis 2019, Market Growth, Trends, Opportunities Forecast To 2024". erienewsnow.com. Retrieved 2019-10-01.

  • Silverstein, Michael J.; Fiske, Neil (2003-04-01). "Luxury for the Masses". Harvard Business Review. ISSN 0017-8012. Retrieved 2023-08-10.

  • "The Luxury Industry: Accelerating and Advancing Corporate Responsibility to Meet Evolving Consumer Demands". Boston Consulting Group (BCG) (Press release). 30 June 2022. Retrieved 3 January 2023 – via prnewswire.com.

  • "Chinese Consumer Attitudes Toward Luxury", Luxury China: Market Opportunities and Potential, Hoboken, NJ, USA: John Wiley & Sons, Inc., pp. 53–76, 2015-09-19, retrieved 2023-08-10

  • Diaz Ruiz, Carlos; Cruz, Angela Gracia B. (2023-01-01). "Unconventional luxury brand collaborations: a new form of luxury consumption among young adults in China". International Marketing Review. 40 (7): 1–21. doi:10.1108/IMR-04-2022-0099. ISSN 0265-1335.

  • "LVMH, Kering, Richemont? Where to Place Your Bets". The Business of Fashion. 2016-06-13. Retrieved 2018-07-28.

  • Cruz, Angela; Ruiz, Carlos Diaz (2023-08-07). "Unconventional luxury brand collaborations are everywhere. What is the appeal?". The Conversation. Retrieved 2023-08-10.

  • “The World Market for Luxury Goods.” Global Market for Luxury Goods. Nov 1, 2001, March 5, 2007.

  • "China bans television ads for bling". Retrieved February 15, 2013.

  • "Export to China". export-to-china.com. Archived from the original on 2 April 2015. Retrieved 18 March 2015.

  • Pedro Gonçalves (16 January 2020). "Asia is most expensive region for wealthy". International Investment. Retrieved 9 October 2020.

  • Zargani, Luisa (28 January 2014). "Luxe Spending to Grow to $1.2 Trillion". wwd.com. Retrieved 29 January 2014.

  • Okonkwo, Uche (2016). Luxury Fashion Branding: Trends, Tactics, Techniques. Springer. p. 145. ISBN 9780230590885. Retrieved 4 October 2019.

  • "Luxury definition in transition: ideal values instead of overconsumption". hausvoneden.com (in German). 2020-09-14. Retrieved 2021-07-06.

  • "Sustainable Luxuries? Millennials are Skeptical – Yet They Buy". hec.edu. Retrieved 2021-07-06.

  • Shellfish Economics A course outline for the FAO of the United Nations; Fisheries and Aquaculture Department. Retrieved April 18, 2008.

  • Rod, Aleš; Rais, Jonáš; Schwarz, Jiří; Čermáková, Klára (2015). "Economics of Luxury: Counting Probability of Buying Counterfeits of Luxury Goods". Procedia Economics and Finance. 30: 720–729. doi:10.1016/S2212-5671(15)01321-0.

  • How inequality may be fuelling our obsession with luxury goods

  • Parker, Christopher J.; Doyle, Stephen (2018). "1". In Ozuem, Wilson; Azemi, Yllka (eds.). Designing Indulgent Interaction: Luxury Fashion, M-Commerce, and Übermensch. IGI Global. pp. 1–21. ISBN 9781522526971.

  • Danziger, Pamela N. (7 May 2017). "What Makes A Brand Luxury And Why Shinola Earns The Title". Forbes. Retrieved 1 February 2020.

  • Danziger, Pamela N. (13 October 2016). "10 core values that make a brand luxury". BrandKnew Magazine. Retrieved 1 February 2020.

  • Eckloff, Lucy (21 May 2018). "Why is a brand considered luxury and why does this change over time?". kadence.com. Retrieved 1 February 2020.

  • Christensen, Jens (2009). Global Experience Industries: the Business of Experience Economy. Aarhus University Press. ISBN 9788779344327.

  • "Annual Report 2017 (PDF)" (PDF). LVMH. Retrieved 4 October 2019.

  • Kering: 2019 Full-year Results, Businesswire.com, 12 February 2020

  • Kapferer, Jean-Noël; Bastien, Vincent (2012). The luxury strategy: break the rules of marketing to build luxury brands (Second ed.). Kogan Page. ISBN 9780749464912.

  • "Louis Vuitton x League of Legends: what if you dressed as your favorite video game character?". Vogue France (in French). 2019-10-31. Retrieved 2023-05-29.

  • Heine, Klaus; Phan, Michel (May 2011). "Trading-Up Mass-Market Goods to Luxury Products". Australasian Marketing Journal. 19 (2): 108–114. doi:10.1016/j.ausmj.2011.03.001. ISSN 1839-3349. S2CID 167596249.

  • Blakemore, Erin (19 November 2018). "How 19th-Century Women Used Department Stores to Gain Their Freedom". History. Retrieved 17 January 2020.

  • Eyeman, Scott (31 March 2012). "See Worth Avenue in a whole new way". The Palm Beach Post. Retrieved 4 October 2019.

    1. Sobczyk, Marcin (4 June 2013). "Luxury Retailers Shop Warsaw". The Wall Street Journal. Retrieved 4 October 2019.
    • Lapatin, Kenneth D. S., Luxus, The Sumptuous Arts of Greece and Rome, 2015, J. Paul Getty Museum, ISBN 9781606064221, google books

    Further reading

    • Chadha, Radha; Husband, Paul (2007). The cult of the luxury brand: inside Asia's love affair with luxury. Nicholas Brealey International. ISBN 9781904838050.
    • Wiesing, Lambert (2019). A Philosophy of Luxury. Routledge. ISBN 9780367138417.
    From Wikipedia, the free encyclopedia Not to be confused with Synthetic gold. "Fool's Gold" redirects here. For other uses, see Fool's Gold (disambiguation). This article is about iron pyrite. For other pyrite minerals, see Pyrite group. Pyrite Intergrowth of lustrous, cubic crystals of pyrite, with some surfaces showing characteristic striations, from Huanzala mine, Ancash, Peru. Specimen size: 7.0 × 5.0 × 2.5 cm General Category Sulfide mineral Formula (repeating unit) FeS2 IMA symbol Py[1] Strunz classification 2.EB.05a Dana classification 2.12.1.1 Crystal system Cubic Crystal class Diploidal (m3) H-M symbol: (2/m 3) Space group Pa3 Unit cell a = 5.417 Å, Z = 4 Identification Formula mass 119.98 g/mol Color Pale brass-yellow reflective; tarnishes darker and iridescent Crystal habit Cubic, faces may be striated, but also frequently octahedral and pyritohedral. Often inter-grown, massive, radiated, granular, globular, and stalactitic. Twinning Penetration and contact twinning Cleavage Indistinct on {001}; partings on {011} and {111} Fracture Very uneven, sometimes conchoidal Tenacity Brittle Mohs scale hardness 6–6.5 Luster Metallic, glistening Streak Greenish-black to brownish-black Diaphaneity Opaque Specific gravity 4.95–5.10 Density 4.8–5 g/cm3 Fusibility 2.5–3 to a magnetic globule Solubility Insoluble in water Other characteristics paramagnetic References [2][3][4][5] The mineral pyrite (/ˈpaɪraɪt/),[6] or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula FeS2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral.[7] Pyrite cubic crystals on marl from Navajún, La Rioja, Spain (size: 95 by 78 millimetres [3.7 by 3.1 in], 512 grams [18.1 oz]; main crystal: 31 millimetres [1.2 in] on edge) Pyrite's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold. The color has also led to the nicknames brass, brazzle, and brazil, primarily used to refer to pyrite found in coal.[8][9] The name pyrite is derived from the Greek πυρίτης λίθος (pyritēs lithos), 'stone or mineral which strikes fire',[10] in turn from πῦρ (pyr), 'fire'.[11] In ancient Roman times, this name was applied to several types of stone that would create sparks when struck against steel; Pliny the Elder described one of them as being brassy, almost certainly a reference to what is now called pyrite.[12] By Georgius Agricola's time, c. 1550, the term had become a generic term for all of the sulfide minerals.[13] Pyrite under normal and polarized light Pyrite is usually found associated with other sulfides or oxides in quartz veins, sedimentary rock, and metamorphic rock, as well as in coal beds and as a replacement mineral in fossils, but has also been identified in the sclerites of scaly-foot gastropods.[14] Despite being nicknamed "fool's gold", pyrite is sometimes found in association with small quantities of gold. A substantial proportion of the gold is "invisible gold" incorporated into the pyrite (see Carlin-type gold deposit). It has been suggested that the presence of both gold and arsenic is a case of coupled substitution but as of 1997 the chemical state of the gold remained controversial.[15] https://en.wikipedia.org/wiki/Pyrite

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