SAPPHIRE


All facts and figures taken from the GIA

SAPPHIRE

The name “sapphire” can also apply to any corundum that’s not ruby red, another corundum variety. Besides blue sapphire and ruby, the corundum family also includes so-called “fancy sapphires.” They come in violet, green, yellow, orange, pink, purple, and intermediate hues. Some stones exhibit the phenomenon known as color change, most often going from blue in daylight or fluorescent lighting to purple under incandescent light. Sapphires can even be gray, black, or brown.


MINERAL: Corundum
CHEMISTRY: Al2O3
COLOR: Every color but red
REFRACTIVE INDEX: 1.762 to 1.770
BIREFRINGENCE: 0.008 to 0.010
SPECIFIC GRAVITY: 4.00
MOHS HARDNESS: 9


Sapphire is the birthstone for September and the gem of the 5th and 45th anniversaries.

FOUND WHERE

Precious_Gemstone_Where_Found_Sapphire