# Mineral Hardness Color Transparency Crystal System Probability See More
1Diamond10.0Colourless, yellowish to yellow, brown, black, blue, green or red, pink, champagne-tan, cognac-brown, lilac (very rare)Transparent, Translucent, OpaqueIsometric0.101
2Kaolinite2.0 - 2.5White to cream and pale-yellow, also often stained various hues, tans and browns being common.Translucent, OpaqueTriclinic0.094
3Ulexite2.5Colourless, white, grey with included clays.TransparentTriclinic0.073
4Sepiolite2.0White, light gray or light yellow.Translucent, OpaqueOrthorhombic0.058
5Pyrope7.5Blood red, orange red, purple red, pink, black red, colorless.Isometric0.057
6Corundum9.0Colourless, blue, red, pink, yellow, grey, golden-brownTransparent, Translucent, OpaqueTrigonal0.041
7Hanksite3.0 - 3.5Colourless to grey, yellow or almost black, colourless in transmitted light.Transparent, TranslucentHexagonal0.041
8Orthoclase6.0Colorless to white, Greenish white, Grayish yellow, Pale pinkTransparent, TranslucentMonoclinic0.032
9Hauerite4.0Reddish-brown/blackOpaqueIsometric0.028
10Leucite5.5 - 6.0White, greyTransparent, TranslucentTetragonal0.025
11Thorianite6.5 - 7.0Dark grey, brown-blackIsometric0.024
12Sanidine6.0Colourless, white, grey, yellowish white, or reddish whiteTransparent, TranslucentMonoclinic0.021
13Lazurite5.0 - 5.5ultramarine, midnight blue, bluish green, greenOpaqueIsometric0.021
14Spinel7.5 - 8.0Black, blue, red, violet, green, brown, pinkTransparent, TranslucentIsometric0.019
15Hydroxylapatite5.0White, grey, yellow, green, violet, purple, red or brownTransparent, Translucent, OpaqueHexagonal0.016
16Narsarsukite7.0Yellow, yellowish-white, grayish-white, honey-yellow, tan, greenish-yellowTransparent, TranslucentTetragonal0.013
17Boracite7.0 - 7.5Green, blue, colourless, grey, white, dark green (ferroan), colourless in transmitted lightTransparent, TranslucentOrthorhombic0.013
18Graphite1.0 - 2.0Iron black to steel-greyOpaqueHexagonal0.012
19Forsterite7.0Green, pale yellow or white.Transparent, TranslucentOrthorhombic0.011
20Henmilite1.5 - 2.0Triclinic0.009
21Sodalite5.5 - 6.0All ColoursTransparent, TranslucentIsometric0.009
22Nordstrandite3.0colorless, coral pink and reddish brownTransparent, OpaqueTriclinic0.008
23Opal5.5 - 6.5Colourless, white, yellow, red, orange, green, brown, black, blueTransparent, Translucent0.007
24Platinum4.0 - 4.5Steel grey to dark greyOpaqueIsometric0.007
25Hauyne5.5 - 6.0Blue, white, grey, yellow, green, pink.0.007
26Whewellite2.5 - 3.0White, yellow, brown, colourless, colourless in transmitted light.Transparent, TranslucentMonoclinic0.005
27Iron4.5Iron-blackOpaqueIsometric0.005
28Analcime5.0 - 5.5White, colourless, gray, pink, greenish, yellowishTransparent, TranslucentTriclinic0.005
29Pargasite5.0 - 6.0Light-brown, brown, greenish-brown to dark green and black.Monoclinic0.004
30Anorthite6.0 - 6.5Colourless, reddish grey, whiteTransparent, TranslucentTriclinic0.004
31Ferronigerite-2N1S3.5Trigonal0.004
32Danburite7.0 - 7.5Pale yellow, yellowish-brown, colourlessTransparent, TranslucentOrthorhombic0.004
33Thorite4.5Yellow, yellow-brown, red-brown, green, orange to blackOpaqueTetragonal0.004
34Greenockite3.0 - 3.5Yellow to red.TranslucentHexagonal0.004
35Franklinite5.5 - 6.0BlackOpaqueIsometric0.004
36Marialite5.5 - 6.0Bluish, Brownish, Colorless, Violet, GreenishTransparent, TranslucentTetragonal0.004
37Ilmenite5.0 - 6.0Iron black or blackOpaqueTrigonal0.004
38Sillimanite6.5 - 7.5Colorless, white, yellow, brown, green, gray.Transparent, TranslucentOrthorhombic0.004
39Hedyphane4.0 - 5.0White, yellowish white, buff, bluish, colourless in transmitted light.Hexagonal0.003
40Hydrocerussite3.5White or grey, colourless in transmitted lightTransparent, TranslucentTrigonal0.003
41Magnetite5.5 - 6.5Greyish black or iron blackOpaqueIsometric0.003
42Spessartine6.5 - 7.5Red, reddish orange, yellowish brown, reddish brown, or brownTransparent, TranslucentIsometric0.003
43Petzite2.5 - 3.0Lead-gray to blackOpaqueIsometric0.003
44Weloganite3.5Light yellow, amber-yellow, whiteTranslucentTriclinic0.003
45Zircon7.5Colourless, yellow, grey, reddish-brown, green, brown, blackTransparent, Translucent, OpaqueTetragonal0.003
46Chlorargyrite1.5 - 2.5Colourless (fresh), bright chartreuse-green, light yellow, light green, grey, becoming violet-brown on exposure to light.Transparent, TranslucentIsometric0.003
47Hydrotalcite2.0White, brownishTransparentTrigonal0.003
48Hydroxylherderite5.0 - 5.5Colorless, gray, brown, pale yellow, greenish white, light blue, purple, colourless in transmitted light.Transparent, TranslucentMonoclinic0.002
49Okenite4.5 - 5.0White to slightly yellow, blueTransparent, TranslucentTriclinic0.002
50Datolite5.0 - 5.5White, greyish, pale green, red, yellow, pink, etc.Transparent, Translucent, OpaqueMonoclinic0.002
51Prosopite4.5Greyish, white, colourless in transmitted light.Transparent, TranslucentMonoclinic0.002
52Afghanite5.5 - 6.0white, light blue, dark blueTranslucentTrigonal0.002
53Milarite6.0Hexagonal0.002
54Microcline6.0 - 6.5White, grey, greyish yellow, yellowish, tan, salmon-pink, bluish green, green.Transparent, TranslucentTriclinic0.002
55Baumhauerite3.0Lead-grey, steel-grey, iridescent at timesOpaqueTriclinic0.002
56Albite6.0 - 6.5White to grey, bluish, greenish, reddishTransparent, TranslucentTriclinic0.002
57Calcite3.0White, Yellow, Red, Orange, Blue, Green, Brown, Gray etc.Transparent, TranslucentTrigonal0.002
58Uvite7.5Black, greenish-black, brownish-black, brown, green, colourlessTransparent, TranslucentTrigonal0.002
59Talc1.0Colorless, white, pale green, bright emerald-green to dark green, brown, grayTransparent, TranslucentTriclinic0.002
60Cosalite2.5 - 3.0GreyOpaqueOrthorhombic0.002
61Chondrodite6.0 - 6.5Yellow, Red or Brown.Transparent, TranslucentMonoclinic0.002
62Monazite-(Ce)5.0 - 5.5Commonly reddish brown to brown, shades of green to brown, yellow brown, rarely nearly white, yellow, colourless in transmitted light.TranslucentMonoclinic0.001
63Cobaltite5.5Reddish silver white, violet steel gray, or black.OpaqueOrthorhombic0.001
64Chromite5.5BlackTranslucent, OpaqueIsometric0.001
65Chloritoid6.5dark green to green-gray or nearly black.TranslucentMonoclinic0.001
66Pyroaurite2.5Yellow to brownish-white, white, gray, silver-white, greenish or colourlessTransparentTrigonal0.001
67Osumilite5.0 - 6.0BlueTransparent, TranslucentHexagonal0.001
68Dypingite2.0 - 3.0WhiteMonoclinic0.001
69Mellite2.0 - 2.5Honey to wax yellow, brown to reddish, gray, seldom white, colourless to pale yellow in transmitted light.Transparent, TranslucentTetragonal0.001
70Geocronite2.5 - 3.0Light lead gray to grayishOpaqueMonoclinic0.001
71Phlogopite2.0 - 3.0Brown, gray, green, yellow, or reddish brownTransparent, TranslucentMonoclinic0.001
72Benitoite6.0 - 6.5Sapphire blue, white to colorless, pinkTransparent, TranslucentHexagonal0.001
73Chabazite-Na4.0Colourless0.001
74Fluorapatite5.0Colourless to white when pure, also green, blue, pink, yellow, brown, violet, purple.Transparent, OpaqueHexagonal0.001
75Lengenbachite1.0 - 2.0Steel-gray, iridescent tarnish at timesOpaqueTriclinic0.001
76Woodhouseite4.5White, flesh-pink, colourlessTransparent, TranslucentTrigonal0.001
77Nepheline5.5 - 6.0White, grey, yellowishTransparent, OpaqueHexagonal0.001
78Gonnardite4.0 - 5.0Orthorhombic0.001
79Phenakite7.5 - 8.0Colourless, white, yellow, pale roseTransparentTrigonal0.001
80Pectolite4.5 - 5.0Colourless, white, pale pink, greenish, pale blueTransparent, TranslucentTriclinic0.001
81Tacharanite5.0WhiteTranslucentMonoclinic0.001
82Quartz7.0Colorless, purple, rose, red, black, yellow, brown, green, blue, orange, etc.Transparent, TranslucentTrigonal0.001
83Kaersutite5.0 - 6.0Dark brown to blackMonoclinic0.001
84Baryte3.0Colourless, white, yellow, brown, grey, blue, etc., colourless in transmitted light (also tinted yellow, brown, green, blue, etc.)Transparent, Translucent, OpaqueOrthorhombic0.001
85Boleite3.0 - 3.5Deep prussian blue to indigo, bluish green in transmitted lightTranslucentIsometric0.001
86Uraninite5.0 - 6.0Black, brownish-black, greyish, greenish, green-gray (thin fragments)OpaqueIsometric0.001
87Cristobalite6.0 - 7.0Colorless, white, also blue grey, brown, grey, yellowTransparent, TranslucentTetragonal0.001
88Pyrophanite5.0 - 6.0Blood red, greenish yellow, brownish, blackishOpaqueTrigonal0.001
89Lead1.5Grey, but often coated with white hydrocerussite or related phasesOpaqueIsometric0.001
90Staurolite7.0 - 7.5Dark brown, brownish-black, red-brownTranslucentMonoclinic0.001
91Scheelite4.5 - 5.0Tan, golden-yellow, colourless, white, greenish, dark brown, etc., colourless in transmitted lightTransparent, OpaqueTetragonal0.001
92Pyrite6.0 - 6.5Pale brass-yellowOpaqueIsometric0.001
93Montmorillonite1.0 - 2.0White, buff, yellow, green, rarely pale pink to redTranslucentMonoclinic0.001
94Glauberite2.5 - 3.0Grey, yellowish, colourless, colourless in transmitted lightTransparent, TranslucentMonoclinic0.001
95Boulangerite2.5 - 3.0Lead greyOpaqueMonoclinic0.001
96Chrysoberyl8.5Green shades, emerald-green, greenish white, yellowish green, greenish brown, yellow, blueTransparent, TranslucentOrthorhombic0.001
97Bornite3.0Copper-red to pinchbeck-brown, quickly tarnishing to an iridescent purplish surface.OpaqueOrthorhombic0.001
98Shattuckite3.5Light to dark blue.TranslucentOrthorhombic0.001
99Makatite5.5 - 6.0whiteMonoclinic0.001
100Howlite3.5 - 6.5White, colorless, brownTransparentMonoclinic0.001