While most varieties are either above or below the threshold hardness of 7, garnets of the grossular variety exhibit hardnesses of 6.5 to 7.5. Grossular garnets (Mexico), photo by James St. John. Licensed under CC By 2.0.
Article: Garnet Buying Guide
Credit: James St. John
|Gemstone||Garnet, Grossular Garnet|
|Natural or man made||Natural|