What Is A Star Sapphire Stone

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.

What is a star sapphire stone.

The star of bombay is a stunning oval star sapphire 182 carats in size. The effect is best viewed under a direct light source and while tilting and rotating the stone from different angles. This effect displays a thin band of light down the centre of the stone and is known as chatoyancy. The international gem society igs has a list of businesses offering gemstone appraisal services.

Very typical of the star sapphire is the optical effect of asterism. 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. Rarely when sapphires are cut in cabochon they can demonstrate a cat s eye effect. With its perfect color cut and luminous star the lab made lindy or linde star sapphire is just too good to be natural.

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 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. The size color and clarity of the stone are of course just as important as they are with other stones.

Works as a relaxing agent during times of extreme physical exertion. Together with the diamond ruby and emerald it is one of the most popular stones in the world. Parti sapphires show two or more colors. Blue star sapphire ceylon good star si vvs type ii 1 000 to 3 000 per carat.

The star sapphire gemstone is one of the most popular gemstones in the world and much sought after by collectors and jewelry lovers. Just like any kind of gem the quality of a star sapphire varies depending upon a number of factors. Star sapphire value see our article called phenomenal gems to read more about the grading and valuation of stones with asterism. Sapphire is one of the most popular gemstones and is used extensively in jewelry.