What is a sapphire?
Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide ( α- Al 2 O 3) with trace amounts of elements such as iron, titanium, chromium, vanadium, or magnesium.
What is a Parti Sapphire?
Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide (α-Al2O3) with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium. It is typically blue, but natural “fancy” sapphires also occur in yellow, purple, orange, and green colors; “parti sapphires” show two or more colors.
What is a yellow sapphire called?
An uncut, rough yellow sapphire found at the Spokane Sapphire Mine near Helena, Montana Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, they occur in other colors, including gray and black, and they can be colorless.
What are some of the most famous sapphires?
Notable sapphires Sapphire Origin Size Cut Color Bismarck Sapphire Myanmar 98.56 carats Table Blue Black Star of Queensland Australia, 1938 733 carats Star Black Blue Belle of Asia Sri Lanka 392.52 carats Cushion Blue Logan Sapphire Sri Lanka 422.99 carats Cushion Blue
What is the history of blue sapphire?
Synthesis of blue sapphire came in 1909, after chemical analyses of sapphire suggested to Verneuil that iron and titanium were the cause of the blue color. Verneuil patented the process of producing synthetic blue sapphire in 1911. : 254–255
What is Sapphire Jubilee?
A sapphire jubilee occurs after 65 years. Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, they occur in other colors, including gray and black, and also can be colorless.
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