Black Star Sapphire Gemstone

Sbkg119 natural color star sapphire gem weighs 3 41 carats star sapphire gemstone size.

Black star sapphire gemstone.

The black star sapphire is an oval shaped gemstone cut as a cabochon like all other star sapphires the center of the star is much bigger and brighter than normal star sapphires. You can read more about asterism in our phenomenal gems article. Sapphire has a specific gravity of 4 00 a refractive index of 1 76 1 78 and birefringence of 0 008. As with all sapphire it s also extremely durable having a hardness of 9 on the mohs scale.

Make offer black star sapphire diamonds and 14 k gold ring vintage size 6 1 4 1960s 12 9 g black star sapphire halo ring in heavy 18k yg setting w 24 old cut diamonds 11g 1 199 00. Parti sapphires show two or more colors. Star sapphire is a type of sapphire displaying an optical star like effect. By using the top menu you can search by origin carat weight size price and other factors to enable you to find the exact gemstone that you are looking for.

Oval cabochon mined in india price. Although black sapphire is not a very popular or sought after gemstone this is not the case for black star sapphires. Many people think that black star sapphires are an entirely different gemstone. From this page you can filter the results further by using the left hand menu.

Black star sapphire s striking star phenomenon is just one reason for this gemstone s popularity. The black sapphire gemstones in stock include huge black star sapphires and small black sapphire gems. Black star sapphire gemstones are typically opaque. The rutile inclusions in the black star sapphire which give it its mystique also result in a vitreous luster when cut as cabochons and polished.

The black star 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. Black star sapphire gemstones are one of the most durable materials and can be worn daily in any gemstone jewelry including daily wear rings. 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. 187 55 this natural black star sapphire cabochon gem shows a very well developed six rayed star when viewed under incandescent bulb light or under direct sunlight.

Black star sapphires are black sapphires that display asterism. This effect is caused by asterism. This effect is caused by asterism. 9 0mm x 7 2mm x 4 5mm deep shape.