Garnet is not a single mineral, but describes a group of several closely related minerals. Garnets come in a variety of colors and have many different varieties. However, the most widely-known color of Garnet gemstones is dark red.

Color Red, Green, Yellow, Orange, Brown, Pink, Purple, Gray, Black
Mohs scale hardness 6.5 - 7.5
Specific gravity 3.50 - 4.30
Refractive index 1.730 - 1.760