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Amazonite, also known as amazonstone, [4] is a green tectosilicate mineral, a variety of the potassium feldspar called microcline. [ 4 ] [ 5 ] [ 6 ] Its chemical formula is KAlSi 3 O 8 , [ 1 ] [ 7 ] which is polymorphic to orthoclase .
Ammolite is an opal-like organic gemstone found primarily along the eastern slopes of the Rocky Mountains of North America.It is commonly unearthed by natural erosion or through the process of various mining practices, within the perimeter of an ancient sea bed called the Western Interior Seaway. [2]
The hoard demonstrates the international trade in luxury goods in the period, including gemstones from sources across South America, Asia and Europe: emerald from Colombia, topaz and amazonite from Brazil; spinel, iolite and chrysoberyl from Sri Lanka, Indian diamond, Burmese ruby, Afghan lapis lazuli, Persian turquoise, pearls from Bahrain, peridot from the Red Sea; Bohemian and Hungarian ...
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Articles related to gemstones and maintained by WikiProject Gemology and Jewelry. Pages in category "WikiProject Gemology and Jewelry - Gemstones" The following 200 pages are in this category, out of approximately 374 total.
When jewelry containing sapphires or rubies is heated, those stones should not be coated with boric acid (which can etch the surface) or any other substance. They do not have to be protected from burning, like a diamond (although the stones do need to be protected from heat stress fracture by immersing the part of the jewelry with stones in the ...