Sapphire Black Star

Sapphire (Greek: sappheiros) refers to gem varieties of the mineral corundum, an aluminium oxide (α-Al2O3), when it is a color other than red, in which case the gem would instead be a ruby. Trace amounts of other elements such as iron, titanium, or chromium can give corundum blue, yellow, pink, purple, orange, or greenish color. Pink-orange corundum are also sapphires, but are instead called padparadscha.

Because it is a gemstone, sapphire is commonly worn as jewelry. Because of its remarkable hardness, sapphire is used in many applications, including infrared optical components, watch crystals, high-durability windows, and wafers for the deposition of semiconductors. Black Star Sapphire is a rare gemstone the major source is found in Nigeria. Cut in Cabochon at the proper angle to the criss-crossing "natural silk" in the corundum crystal produces a stong six ray and sometimes a twelve ray asterism when viewed in sunlight or any strong single source light. Under multiple of sources of light viewing of the jewel may show multiple smaller stars. Black Star sapphire is a very beautiful and duable gemstone. Black Star sapphire is a September birthstone.