SAPPHIREis the name for all gemstones in the Corundum mineral group, apart from the Red variety which is called Ruby. When used alone the name Sapphire assumes Blue Sapphire. Corundum is the second hardest mineral on earth, just below the hardest mineral, Diamond.
Sapphire gets it’s colour from trace amounts of elements such as iron, titanium, chromium, copper, vanadium or magnesium. These impurities can give corundum blue, yellow, pink, purple, orange, or greenish color
natural Sapphire ,heat treated