Ads
related to: black star sapphire sideselizabeth-gage.com has been visited by 10K+ users in the past month
Search results
Results from the WOW.Com Content Network
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.
The Black Star of Queensland, also known as the Brimstone of Queensland, named after its nature and place of origin, is a 733-carat (146.6 g) black sapphire, and was the world's largest gem quality star sapphire until The Star of Adam was discovered. The Black Star sapphire is an oval-shaped gemstone cut as a cabochon like all other star ...
The star-effect may be also caused by the inclusions of hematite. In black star sapphire hematite needles formed parallel to the faces of the second order prism produce asterism. Some star sapphires from Thailand contain both hematite and rutile needles forming a 12-ray star. [3] Star-stones were formerly regarded with much superstition. [1]
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]
For premium support please call: 800-290-4726 more ways to reach us
Logan Sapphire; Star of Bombay, given to Mary Pickford by Douglas Fairbanks, Sr; Star of India; Stuart Sapphire; Black Star of Queensland; Star of Adam, with a weight of 1,404.49 carats (280.898 g), it is the largest star sapphire in the world. Queen Marie of Romania Sapphire
Ads
related to: black star sapphire sideselizabeth-gage.com has been visited by 10K+ users in the past month