26.55 Carats Natural Imperial Topaz Loose Gemstone

684

存貨單位
尺寸（毫米）: 17.000 x 15.000 x 12.000mm
重量 (cts): 26.550
Treatment: No Treatment
類型: Faceted
顏色

Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al₂SiO₄(F, OH)₂. Topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminated by pyramidal and other faces. It is one of the hardest naturally occurring minerals (Mohs hardness of 8) and is the hardest of any silicate mineral. This hardness combined with its usual transparency and variety of colors means that it has acquired wide use in jewellery as a cut gemstone as well as for intaglios and other gemstone carvings.^[5]

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存貨單位
尺寸（毫米）: 17.000 x 15.000 x 12.000 mm
重量 (cts): 26.550
Treatment: No Treatment
類型: Faceted
顏色

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