Hardness values for gems and simulants

Mineral Hardness

Fluorite...............4
Opal...................5.5 -6.5
Lapis..synth...........4.5
Lapis..gem.............5 -5.5
Orthoclase..feldspar...6
Amazonite..feldspar....6
Adularia..moonstone....6 -6.5
Chalcedony.............6.5
Albite..moonstone......6 -6.5
Amber..................2.5
Cordierite.............7 -7.5
Iolite.................7 -7.5
Serpentine.............2 -5
Quartz.................7
Scapolite (yellow).....6.5
Labradorite..feldspar..6 -6.5
Beryl..................7.5 -8
Turquoise..gem.........5 -6
Nephrite..jade.........5 -6
Tourmaline.............7
Andalusite.............7 -7.5
Topaz .................8
Tourmaline.............7
Danburite..............7
Andalusite.............7 -7.5
Apatite................5
Jadeite................6.5 -7
Phenakite..............7.5 -8
Euclase................7.5
Enstatite..............5.5
Spodumene..............6 -7
Peridot................6.5 -7
Axinite................6.5 -7
Olivine................6 -7
Zoisite................6.5
Diopside...............5 -5.6
Idocrase...............6.5
Spinel.................8
Synthetic Spinel.......8
Rhodonite..............5.5 -6.5
Grossular..garnet......6.5 -7.5
Kyanite................4 -7
Hessonite..garnet......6.5 -7
Chrysoberyl............8.5
Pyrope.................7 -7.5
Rhodolite..garnet......7 -7.5
Corundum...............9
Benitoite..............6 -6.5
Zircon..low............6
Rhodochrisite..........4
Spessartite..garnet....6.5 -7.5
Almandine..garnet......6 -7.5
YAG....................8.25
Demantoid..garnet......6.5 -7
Malachite..............4
Zircon...high..........7.5
Sphene.................5 -5.5
Cassiterite............6 -7
GGG....................6.5
Cubic Zirconia.........8.5
Blende.(Sphalerite)....3.5 -4
Strontium Titanate.....5.5
Diamond................10
Anatase....rutile......5.6 -6
Rutile.................6
Hematite...............6.5

From the compilation GEMSTONE