What Is A Star Sapphire Stone

Fine star sapphires must have enough silk for a bright well defined star without compromising the stone s transparency.

What is a star sapphire stone.

Very typical of the star sapphire is the optical effect of asterism. Works as a relaxing agent during times of extreme physical exertion. Star sapphire value see our article called phenomenal gems to read more about the grading and valuation of stones with asterism. When viewing star sapphire a six rayed star will appear to float across the surface of the stone.

Blue star sapphire ceylon good star si vvs type ii 1 000 to 3 000 per carat. The star of bombay is a stunning oval star sapphire 182 carats in size. With its perfect color cut and luminous star the lab made lindy or linde star sapphire is just too good to be natural. Sapphire is one of the most popular gemstones and is used extensively in jewelry.

Sapphires are one of the few gemstones that produce a star shape of four to six light reflecting rays across the center of a cut stone. Star sapphires usually have six ray stars but twelve ray stars are also known. Star sapphire is rare variety of sapphire that exhibits a rare asterism under specific lighting. The size color and clarity of the stone are of course just as important as they are with other stones.

Together with the diamond ruby and emerald it is one of the most popular stones in the world. Rarely when sapphires are cut in cabochon they can demonstrate a cat s eye effect. Parti sapphires show two or more colors. The effect is best viewed under a direct light source and while tilting and rotating the stone from different angles.

Sapphire is a precious gemstone a variety of the mineral corundum consisting of aluminum oxide α al 2 o 3 with trace amounts of elements such as iron titanium chromium vanadium or magnesium it is typically blue but natural fancy sapphires also occur in yellow purple orange and green colors. Just like any kind of gem the quality of a star sapphire varies depending upon a number of factors. The ideal star sapphire would be entirely transparent but the rutile silk that causes the star phenomenon ensures that every star sapphire is to some degree included. This effect displays a thin band of light down the centre of the stone and is known as chatoyancy.