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The Sunrise Ruby[1][2][3] has been the world's most expensive ruby, most expensive coloured gemstone, and most expensive gemstone other than a diamond [2][3][4] until the discovery of the Estrela de Fura. Originally mined in Myanmar, its current name is derived from a poem of the same name, written by the 13th-century Sufi poet Rumi.
The third way is by examining a cut stone through its crown facets and viewing the pavilion cuts at the back of the stone using a standard jeweller's loupe: forsterite will show birefringence, making the pavilion cuts appear "doubled up", while the much lower birefringence of tanzanite will not have this characteristic.
A–B Actinolite Nephrite (var.) Adamite Aegirine Afghanite Agrellite Algodonite Alunite Amblygonite Analcime Anatase Andalusite Chiastolite Andesine Anglesite Anhydrite Annabergite Anorthite Antigorite Bowenite Apatite Apophyllite Aragonite Arfvedsonite Asbestos Astrophyllite Atacamite Augelite Austinite Axinite group: Ferroaxinite Magnesioaxinite Manganaxinite Tinzenite Azurmalachite Azurite ...
A number of individual gemstones are famous in their own right, either because of their size and beauty or because of the people who owned or wore them.
A gemstone desired to be used in jewelry is cut depending on the size and shape of the rough stone, as well as the desired piece of jewelry to be made. As a general rule, a cut gemstone will reduce the mass (in carats) by about 50%.
Painite is a very rare borate mineral. It was first found in Myanmar by British mineralogist and gem dealer Arthur C.D. Pain who misidentified it as ruby, until it was discovered as a new gemstone in the 1950s. When it was confirmed as a new mineral species, the mineral was named after him.
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