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Sapphire Origin Date Size Cut Color Location Ref Star of Adam: Sri Lanka 2015 1,404.49 carats (280.898 g) Star Blue Anonymous owner [3] Black Star of Queensland: Australia 1938 733 carats (146.6 g) Star Black Anonymous owner [4] Star of India: Sri Lanka 563.4 carats (112.68 g) Star Blue-gray American Museum of Natural History, New York [5]
Black star needles are perpendicular (cited above) meaning that the sides are dark. The flat face is a bright gold but loses it as soon as a dome is cut. [4] The Journal of gemmology mentions polysynthetic twinning (parallel lines). The star effect occurs in other sapphire colours and is often translucent.
Actinolite. Nephrite (var.); Adamite; Aegirine; Afghanite; Agrellite; Algodonite; Alunite; Amblygonite; Analcime; Anatase; Andalusite. Chiastolite; Andesine ...
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Synthetic corundum includes ruby (red variation) and sapphire (other color variations), both of which are considered highly desired and valued. [58] Ruby was the first gemstone to be synthesized by Auguste Verneuil with his development of the flame-fusion process in 1902. [ 59 ]
Black Onyx Onyx. Onyx - Hebrew שֹׁהַם shoham, Greek ὀνύχινος onychinos, Latin lapis onychinus. The eleventh stone of the breastplate in the Hebrew and the Vulgate (Exodus 28:20, 39:13), representing the tribe of Joseph. In the Septuagint it is the twelfth stone and the fifth in Ezekiel 28:13 in the Hebrew, but the twelfth ...
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