Gemstones
From Zissil
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==Types of Gemstones== | ==Types of Gemstones== | ||
− | === | + | ===Amber=== |
− | + | Although found in the earth Amber is was produced by living organisms and is not considered a mineral, instead being classified as a mineraloid. | |
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===Chalcedony=== | ===Chalcedony=== | ||
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*Iris Agate | *Iris Agate | ||
*Landscape Agate | *Landscape Agate | ||
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− | === | + | ===Jet=== |
− | + | Although found in the earth Jet is was produced by living organisms and is not considered a mineral, instead being classified as a mineraloid. | |
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− | == | + | ==Lapis Lazuli== |
− | + | Lapis lazuli is a mixture of minerals lazurite, calcite and sometimes pyrite and is classified as a rock. In the jewelry industry it is often referred to simply as 'lapis'. | |
− | === | + | ====Garnets==== |
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Unlike other gem families whose color variations result due to the presence of impurities, garnets colors are due to differences in their actual chemical structure. Therefore they are classified as a 'group' unlike other families that are classified as a 'species'. | Unlike other gem families whose color variations result due to the presence of impurities, garnets colors are due to differences in their actual chemical structure. Therefore they are classified as a 'group' unlike other families that are classified as a 'species'. | ||
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==History== | ==History== | ||
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==Treatments== | ==Treatments== | ||
− | Treatments developed to raise | + | Treatments developed to raise apperent value of stones. |
[[Category:Gemology]] | [[Category:Gemology]] |