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In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [ 80 ] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
Download QR code; Wikidata item; Print/export Download as PDF; Printable version; In other projects ... There are a number of organic materials used as gems ...
The Gemological Institute of America ( GIA) is a nonprofit institute based in Carlsbad, California. It is dedicated to research and education in the field of gemology and the jewelry arts. [ 1] Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality.
Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including ( clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...
New York City. , New York. , United States. Website. www .gemscience .net. Gemological Science International, or GSI, is an independent gemological organization that is one of the largest gemological entities in the world, with offices in four continents. [1] [2] [3]
Diamond[ a] is a gemstone formed by cutting a raw diamond. Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and ...
Business | Culture and Society | Gemology | Gemstones | Jewelry | Lapidary | People. This category is for Wikipedia users who have an interest in gemology, gemstones, and/or jewelry. Also, feel free to participate in the Gemology and Jewelry Wikipedians' notice board. To add yourself to this list, insert the following on your user page:
2) How to identify color, color grading systems, color on an LCD screen (internet sales), role of (day-)light, lighting in jewelry store etc. 3) Kimberley process: yes/no functioning; 4) Patriot act and Homeland Security affecting jewelry/gem industry (import the top ruby from Burma which has a boycott against it from the USA e.g.
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