Mineral Hardness

Diamond 10
Corundum (Ruby, Sapphire, etc.) 9
Chrysoberyl 8.5
Topaz 8
Spinel (Balas Ruby) 8-7.75
Phenacite 7.75
Beryl (Emerald, Aquamarine, etc.) 7.75
Zircon (Hyacinth) 7.5
Euclase 7.5
Staurolite 7.5
Andalusite 7.25
Iolite 7.25
Tourmaline 7.25
Garnet 7
Quartz (Amethyst, Rock Crystal, Jasper, etc.) 7
Jadeite 6.75
Axinite 6.75
Chalcedony (Agate, Carnelian, etc.) 6.5
Chrysolite 6.5
Vesuvianite 6.5
Epidote 6.5
Prehnite 6.5
Pyrite 6.5
Feldspar (Amazonstone,Moonstone, Labradorite, etc.) 6
Turquois 6
Diopside 6
Nephrite 5.75
Opal 5.5-6.5
Moldavite 5.5
Obsidian 5.5
Hematite 5.5
Sphene 5.5
Lapis Lazuli 5.5
Hauynite 5.5
Cyanite 5-7
Dioptase 5
Fluorite 4
Malachite 3.5
Jet 3.5
Amber 2.5
Gypsum (Alabaster, Satinspar, etc.) 2