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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 garnet family is one of the most complex in the gem world. It is not a single species, but is composed of multiple species and varieties. [ 54 ] It is the state mineral of Connecticut, [ 55 ] New York's gemstone, [ 56 ] and star garnet (garnet with rutile asterisms) is the state gemstone of Idaho. [ 57 ]
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 ...
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.
A Treasure's Trove: A Fairy Tale About Real Treasure for Parents and Children of All Ages is an illustrated children's book written by Michael Stadther and published in 2004 by Treasure Trove Inc, which he incorporated to do so. [ 1][ 2] The "real treasure" was found by deciphering clues in the book that led to fourteen tokens that could be ...
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 ...
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]