What are the different colors of Black Star Sapphires?
Hematite inclusions cause asterism in black star sapphires. The sapphire’s color is actually yellow, green, or blue, but the inclusions make it appear dark brown or black. The finest star is distinct, centered on the top of the stone, and visible from a reasonable distance, about arm’s length.
DA: 31 PA: 47 MOZ Rank: 15