Copal...............1.06
Amber...............1.08
Bakelite............1.26
Jet.................1.30 -1.35
Tortoiseshell.......1.30
Erinoid.............1.33
Celluloid...........1.38
Vegetable Ivory.....1.40
Ivory...............1.80
Kurnakovite.........1.86
Gaylussite..........1.99
Ulexite.............1.95
Meerscham...........2.00
Bone................2.00
Fire Opal...........2.00
Opal................2.10
Chrysocolla.........2.20
Stichtite...........2.2
Silica Glass........2.21
Natrolite...........2.225
Sodalite............2.13 -2.29
Alabaster...........2.3 -2.33
Obsidian............2.3 -2.6
Apophyllite.........2.3 -2.5
Thomsonite..........2.35
Hambergite..........2.35
Petalite............2.39
Mouldavite..........2.35
Obsidian............2.35
Tugtupite...........2.37 -2.57
Hauynite............2.4
Cancrinite..........2.45
Colemanite..........2.42
Leucite.............2.47
Pseudophite.........2.55
Howlite.............2.53 -2.59
Veriscite...........2.55
Elaeolite...........2.55 -2.65
Amazonite...........2.56 -2.58
Orthoclase..........2.56
Moonstone...........2.57
Sanidine............2.57
Moss Agate..........2.58 -2.62
Chrysoprase.........2.58 -2.64
Iolite..............2.59
Bowenite............2.60
Agate...............2.60 -2.65
Chalcedony..........2.60
Vivianite...........2.65
Peristerite.........2.61 -2.63
Aventurine..(fsp)...2.62 -2.65
Scapolite..(pink)...2.63
Sunstone............2.64
Quartz..............2.65
Amethyst............2.63 -2.65
Prasiolite..........2.65
Citrine.............2.65
Synth. Emerald......2.65
Coral...............2.68
Aquamarine..........2.69
Beryl (yellow)......2.69
Labradorite.........2.69
Pseudophite.........2.70
Onyx................2.70
Augelite............2.70
Tiger eye...........2.64 -2.71
Emerald.............2.71
Labradorite.........2.70
Aquamarine..........2.67 -2.71
Scapolite...........2.70
Calcite.............2.71
Pearl (natural).....2.71
Pearl (cultured)....2.75
Talc................2.75
Turquoise...........2.80
Serpentine..........2.4 -2.8
Steatite............2.7 -2.8
Lapis Lazuli........2.80
Beryllonite.........2.82
Jasper..............2.58 -2.91
Conch Pearl.........2.85
Prehnite............2.87
Verdite.............2.90
Pollucite...........2.92
Argonite............2.94
Dolomite............2.85 -2.95
Anhydrite...........2.90 -2.99
Datolite............2.95
Phenakite...........2.96
Nephrite............2.96
Brazilianite........2.99
Nephrite............2.90 -3.04
Danburite...........3.00 -3.07
Tremolite...........2.90 -3.1
Magnesite...........3.00 -3.12
Andalusite..........3.12 -3.18
Amblygonite.........3.03
Tourmaline..........3.02 -3.26
Lazulite............3.09
Euclase.............3.10
Zoisite.............3.10
Andalusite..........3.15
Kunzite.............3.16 -3.2
Hiddenite...........3.16 -3.2
Carborundum.........3.17
Fluorite............3.18
Spodumene...........3.18
Apatite.............3.21
Fibrolite...........3.25
Smaragdite..........3.25
Sillimanite.........3.25
Enstatite...........3.27
Axinite.............3.28
Ekanite.............3.28
Tanzanite...........3.28 -3.35
Diopside............3.29
Dioptase............3.30
Kornerupine.........3.32
Jadeite.............3.34
Peridot.............3.34
Purpurite...........3.35
Zoisite (blue)......3.34
Idocrase............3.38
Rhodizite...........3.40
Epidote.............3.45
Dumortierite........3.26 -3.41
Sinhalite...........3.48
Hypersthene.........3.45
Hemimorphite........3.45
Grossular (massive).3.50
Diamond.............3.52
Sphene..............3.53
Topaz (yellow)......3.53
Topaz (white).......3.56
Periclase (synth)...3.59
Gahnite.............3.58 -3.98
Rhodonite...........3.60
Rhodochrosite.......3.60
Spinel..............3.60
Grossular...........3.64
Benitoite...........3.67
Taaffeite...........3.61
Spinel (synth)......3.63
Hessonite...........3.65
Barytocalcite.......3.66
Benitoite...........3.67
Kyanite.............3.68
Staurolite..........3.70
Azurite.............3.80
Pyrope..............3.70
Chrysoberyl.........3.71
Alexandrite.........3.70 -3.73
Staurolite..........3.75
Uvarovite...........3.77
Malachite...........3.80
Pleonaste...........3.80
Demantoid...........3.82 -3.85
Chalybite...........3.85
Periclass...........3.80
Anatase.............3.88
Gahnospinel.........3.97
Celestite...........3.97 -4.00
Corundum............3.96 -4.01
Sapphire............3.99 -4.00
Ruby................3.97 -4.08
Painite.............4.01
Willemite...........4.03
Sphalerite (blend)..4.09
Glass...............3.15 -4.20
Zircon (green)......4.50
Almandine...........4.97
Spessartine.........4.16
Chalcopyrite........4.20
Rutile (synth)......4.25
Witherite...........4.27 -4.35
Smithsonite.........4.35
Barite..............4.50
YAG.................4.60
Zircon (blue,white).4.69
Chromite............4.1 -4.9
Pyrite..............5.10
Hematite............5.05
Strontium Titanate..5.13
Proustite...........5.57 -5.64
Cubic Zirconia......5.6-5.9
Zincite.............5.66
Crocoite............5.90 -6.1
Sheelite............6.00
Phosgenite..........6.13
Cuprite.............5.85 -6.15
Cerussite...........6.45 -6.57
Wulfenite...........6.7 -7.00
Cassiterite.........6.90
GGG.................7.05
Tantaltite..........5.18 -8.20
From the compilation in the program GEMSTONE