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 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. 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. Parti sapphires show two or more colors. Star sapphire is a type of sapphire displaying an optical star like effect.

Sapphires are the most liked gemstones and one of the most interesting one is black star sapphires the name star has come because of its appearance as when this stone is seen in under flashlight it shows a bedazzling star image on the stone that gives out the beam of 6 rays altogether forming a star. 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. 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. 9 0mm x 7 2mm x 4 5mm deep shape.

Black star sapphires are black sapphires that display asterism. Black sapphire vs black star sapphire. 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. From this page you can filter the results further by using the left hand menu.

You can read more about asterism in our phenomenal gems article. 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. Black star sapphire gemstones are one of the most durable materials and can be worn daily in any gemstone jewelry including daily wear rings. Oval cabochon mined in india price.

Sapphire has a specific gravity of 4 00 a refractive index of 1 76 1 78 and birefringence of 0 008. This effect is caused by asterism. Many people think that black star sapphires are an entirely different gemstone. The black sapphire gemstones in stock include huge black star sapphires and small black sapphire gems.

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. Black star sapphire gemstones are typically opaque. This effect is caused by asterism. As with all sapphire it s also extremely durable having a hardness of 9 on the mohs scale.