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Actinolite. Nephrite (var.); Adamite; Aegirine; Afghanite; Agrellite; Algodonite; Alunite; Amblygonite; Analcime; Anatase; Andalusite. Chiastolite; Andesine ...
Many gems are crystals which are classified by their crystal system such as cubic or trigonal or monoclinic. Another term used is habit, the form the gem is usually found in. [12] For example, diamonds, which have a cubic crystal system, are often found as octahedrons. [13] Gemstones are classified into different groups, species, and varieties.
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 ...
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Download as PDF; Printable version ... depicted as a luminous pearl and is in the possession of several of different forms of the Buddha. ... Fulfilling Gem' ...
Inclusions are one of the most important factors when it comes to gem valuation. They diminish the clarity and value of many gemstones, such as diamonds, and increase the value of others, such as star sapphires. [5] Many colored gemstones are expected to have inclusions which do not greatly affect their values. They are categorized into three ...
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