ABOUT YELLOW SAPPHIRE
A gem of the corundum family, yellow sapphire is a twin of ruby and blue sapphire. It is found in yellow, golden, and orange colors, as well as in a colorless variety known as white sapphire. The best gem is said to be of lemon-yellow color.
|Refractive Index||1.762 to 1.770|
|Birefringence||0.008 to 0.010|