# Mineral Hardness Color Transparency Crystal System Probability See More
1Cryolite2.5Colourless, white, brown, grey, black, colourless in transmitted light.Transparent, TranslucentMonoclinic0.055
2Witherite3.0 - 3.5Colourless, white, greyish, light yellow, colourless in transmitted light.Transparent, TranslucentOrthorhombic0.048
3Marialite5.5 - 6.0Bluish, Brownish, Colorless, Violet, GreenishTransparent, TranslucentTetragonal0.029
4Corundum9.0Colourless, blue, red, pink, yellow, grey, golden-brownTransparent, Translucent, OpaqueTrigonal0.028
5Bikitaite6.0Colorless, WhiteTransparent, TranslucentTriclinic0.025
6Meionite5.0 - 6.0Colorless, white, grey, pink, violet, blue, yellow, orange-brown, brownTransparent, OpaqueTetragonal0.024
7Triplite5.0 - 5.5Brown, red-brown, dark brown, black (altered), light brownish u=yellow to dark reddish brown in transmitted light.OpaqueMonoclinic0.024
8Phenakite7.5 - 8.0Colourless, white, yellow, pale roseTransparentTrigonal0.024
9Topaz8.0Colourless, white, pale blue, light green, yellow, yellowish brown, or redTransparent, TranslucentOrthorhombic0.02
10Pargasite5.0 - 6.0Light-brown, brown, greenish-brown to dark green and black.Monoclinic0.019
11Milarite6.0Hexagonal0.017
12Beryl7.5 - 8.0Colorless, green, blue, yellow, white, pink, etc.Hexagonal0.016
13Sellaite5.0 - 5.5Colourless, white, colourless in transmitted light.TransparentTetragonal0.015
14Graphite1.0 - 2.0Iron black to steel-greyOpaqueHexagonal0.015
15Chondrodite6.0 - 6.5Yellow, Red or Brown.Transparent, TranslucentMonoclinic0.014
16Berzelianite2.0Silver-White, shiny lead-grey, easily tarnishes iridescent blue-greyOpaqueIsometric0.013
17Cordierite7.0 - 7.5Grey, blue, blue-violet, greenish, yellowish brown, colourless to very light blue in transmitted light.Transparent, TranslucentOrthorhombic0.012
18Brucite2.5 - 3.0White, light greenish, grayish, bluish, honey-yellow, brownish red deep brown (manganoan varieties)Transparent, TranslucentTrigonal0.012
19Sodalite5.5 - 6.0All ColoursTransparent, TranslucentIsometric0.012
20Afghanite5.5 - 6.0white, light blue, dark blueTranslucentTrigonal0.012
21Talc1.0Colorless, white, pale green, bright emerald-green to dark green, brown, grayTransparent, TranslucentTriclinic0.011
22Meliphanite5.0 - 5.5yellow, yellowish red, nearly colourlessTransparent, TranslucentTetragonal0.009
23Hanksite3.0 - 3.5Colourless to grey, yellow or almost black, colourless in transmitted light.Transparent, TranslucentHexagonal0.009
24Lazurite5.0 - 5.5ultramarine, midnight blue, bluish green, greenOpaqueIsometric0.008
25Brannerite4.5 - 5.5Black, brownish olive-green, yellow-brown to yellow with alteration, yellowish green in transmitted lightOpaqueMonoclinic0.008
26Orthoclase6.0Colorless to white, Greenish white, Grayish yellow, Pale pinkTransparent, TranslucentMonoclinic0.008
27Trona2.5Colourless, gray-white, light yellow, colourless in transmitted light.TranslucentMonoclinic0.007
28Cancrinite5.0 - 6.0grey-green, white, yellow, blue, orange, reddishTransparent, TranslucentHexagonal0.007
29Montebrasite5.5 - 6.0White, colorless, gray white, very pale brown, pale pink, pale yellowTransparent, TranslucentTriclinic0.007
30Alstonite4.0 - 4.5Colourless to snow white, yellow-gray, pale gray, pale cream, pink to pale rose-redTransparent, TranslucentTriclinic0.007
31Hydroxylapatite5.0White, grey, yellow, green, violet, purple, red or brownTransparent, Translucent, OpaqueHexagonal0.007
32Gadolinite-(Y)6.5 - 7.0Black, greenish-black, brownOpaqueMonoclinic0.006
33Dravite7.0Pale brown to dark-brown to brownish-black, also dark-yellow, blue.Transparent, TranslucentTrigonal0.006
34Aikinite2.0 - 2.5Blackish lead-greyOpaqueOrthorhombic0.006
35Andalusite6.5 - 7.5Pink to red brown, occasionally yellow, green, white, gray rarely violetTransparent, TranslucentOrthorhombic0.006
36Sulphur1.5 - 2.5Yellow, sulphur-yellow, brownish or greenish yellow, orange, whiteTransparent, TranslucentOrthorhombic0.006
37Strontianite3.5Colourless, white, gray, light yellow, green, brown, colourless in transmitted lightTransparent, TranslucentOrthorhombic0.006
38Anhydrite3.0 - 3.5Colourless, bluish, blue-grey, violet, burgundy-red, white, rose-pink, brownish, reddish, grey, dark grey, colourless in transmitted lightTransparent, TranslucentOrthorhombic0.006
39Euxenite-(Y)5.5 - 6.5Black, greenish or brownish tint at timesOrthorhombic0.006
40Lollingite5.0 - 5.5Steel gray to silver white0.006
41Albite6.0 - 6.5White to grey, bluish, greenish, reddishTransparent, TranslucentTriclinic0.006
42Grandidierite7.5Bluish green, greenish blueTransparent, TranslucentOrthorhombic0.006
43Norbergite6.0 - 6.5Orange-yellow, yellow, orange to brown.Transparent, TranslucentOrthorhombic0.005
44Ulexite2.5Colourless, white, grey with included clays.TransparentTriclinic0.005
45Ussingite6.0 - 7.0Pale to medium violet, reddish violet, sometimes barely tinted purpleTransparent, TranslucentTriclinic0.005
46Lithiophilite4.0Reddish-brown, yellowish brown, golden-yellow, salmon-orange, colourless to light yellow, pink in transmitted light.Transparent, TranslucentOrthorhombic0.005
47Laumontite3.5 - 4.0Colorless to pink, white, gray, yellowish, brownish, golden brownTransparent, TranslucentMonoclinic0.005
48Calcite3.0White, Yellow, Red, Orange, Blue, Green, Brown, Gray etc.Transparent, TranslucentTrigonal0.005
49Narsarsukite7.0Yellow, yellowish-white, grayish-white, honey-yellow, tan, greenish-yellowTransparent, TranslucentTetragonal0.005
50Diamond10.0Colourless, yellowish to yellow, brown, black, blue, green or red, pink, champagne-tan, cognac-brown, lilac (very rare)Transparent, Translucent, OpaqueIsometric0.005
51Tugtupite4.0Commonly red, also white to pink, bluish white, greenish whiteTranslucentTetragonal0.005
52Spodumene6.5 - 7.0Colourless, yellow, light green, emerald-green, pink to violet, purple, white, grayTransparent, TranslucentMonoclinic0.005
53Clausthalite2.5 - 3.0Bluish grey to lead-greyOpaqueIsometric0.004
54Alumohydrocalcite2.5Chalky white to pale blue, pale yellow, cream, gray, pale rose or brownish pink to dark violet in chromian varietiesTransparent, Translucent, OpaqueTriclinic0.004
55Rammelsbergite5.5 - 6.0Tin white with faint pinkish hueOpaqueOrthorhombic0.004
56Scheelite4.5 - 5.0Tan, golden-yellow, colourless, white, greenish, dark brown, etc., colourless in transmitted lightTransparent, OpaqueTetragonal0.004
57Prehnite6.0 - 6.5Colourless to gray to yellow, yellow-green or whiteTranslucentOrthorhombic0.004
58Opal5.5 - 6.5Colourless, white, yellow, red, orange, green, brown, black, blueTransparent, Translucent0.004
59Microcline6.0 - 6.5White, grey, greyish yellow, yellowish, tan, salmon-pink, bluish green, green.Transparent, TranslucentTriclinic0.004
60Petalite6.5Colourless, white, grey, pinkTransparent, TranslucentMonoclinic0.004
61Sanidine6.0Colourless, white, grey, yellowish white, or reddish whiteTransparent, TranslucentMonoclinic0.004
62Tantalite-(Mn)6.0Pink to nearly colourless, reddish brown to blackOpaqueOrthorhombic0.004
63Hydroxylherderite5.0 - 5.5Colorless, gray, brown, pale yellow, greenish white, light blue, purple, colourless in transmitted light.Transparent, TranslucentMonoclinic0.004
64Celestine3.0 - 3.5Colourless, shades of light blue, white, reddish, greenish, brownish, greyish, colourless or lightly tinted in transmitted lightTransparent, TranslucentOrthorhombic0.004
65Svanbergite5.0colourless, yellow, reddish brown to rose-pink, colourless in transmitted lightTranslucentTrigonal0.004
66Clinohumite6.0Monoclinic0.004
67Spessartine6.5 - 7.5Red, reddish orange, yellowish brown, reddish brown, or brownTransparent, TranslucentIsometric0.004
68Charlesite2.5Colorless, white, rarely pale yellow, rarely pinkTransparent, TranslucentTrigonal0.004
69Goosecreekite4.5Colorless, whiteTransparentMonoclinic0.004
70Aragonite3.5 - 4.0Colorless to white or grey, often stained various hues by impurities, such as blue, green, red or violet, colourless in transmitted light.Transparent, TranslucentOrthorhombic0.004
71Groutite3.5 - 4.0Black, may be iridescentOpaqueOrthorhombic0.004
72Stilbite-Ca3.5 - 4.0White, colourless, red, light yellow, light to dark brown, cream, orange, pinkTransparent, TranslucentMonoclinic0.004
73Quartz7.0Colorless, purple, rose, red, black, yellow, brown, green, blue, orange, etc.Transparent, TranslucentTrigonal0.003
74Sillimanite6.5 - 7.5Colorless, white, yellow, brown, green, gray.Transparent, TranslucentOrthorhombic0.003
75Matlockite2.5 - 3.0Colourless, light yellow to light golden-yellow, greenishTransparentTetragonal0.003
76Parisite-(Ce)4.5Brown, brownish-yellow, waxy yellow, gray-yellow, colourless to yellow in transmitted light.Transparent, TranslucentMonoclinic0.003
77Eucryptite6.5Colorless, white, pale tan, pale gray.Transparent, TranslucentTrigonal0.003
78Dumortierite7.0 - 8.0Blue, greenish-blue, violet-blue, pale blue, pink, redTranslucentOrthorhombic0.003
79Schorl7.0Bluish-black to black, sometimes brownish-black, rarely greenish-black.Translucent, OpaqueTrigonal0.003
80Lizardite2.00.003
81Beryllonite5.5 - 6.0Colourless, white, rarely pale light yellow, colourless in transmitted light.Transparent, TranslucentMonoclinic0.003
82Thortveitite6.0 - 7.0Greyish-green, black, grey, blue, yellow, brownTranslucent, OpaqueMonoclinic0.003
83Phlogopite2.0 - 3.0Brown, gray, green, yellow, or reddish brownTransparent, TranslucentMonoclinic0.003
84Fluoro-richterite5.0 - 6.0Brown to brownish-red, rose-red, yellow, grey-brown, also pale to dark green.Monoclinic0.003
85Stilpnomelane3.0 - 4.0Red, brown, black, dark green, dark reddish brown, golden brownTranslucentTriclinic0.003
86Stellerite4.5Colourless to white, pink, orangeTransparentOrthorhombic0.003
87Columbite-(Mn)6.0Black to brownish black, reddish brown in transmitted lightTransparent, Translucent, OpaqueOrthorhombic0.003
88Zinkenite3.0 - 3.5Steel-greyOpaqueHexagonal0.003
89Wollastonite4.5 - 5.0White, gray-white, light green, pinkish, brown, red, yellowTransparent, TranslucentTriclinic0.003
90Galenobismutite2.5 - 3.5Lead-gray, gray, light gray, tin-whiteOpaqueOrthorhombic0.003
91Barytocalcite4.0Colourless, white, greyish, greenish, light yellowTransparent, TranslucentMonoclinic0.003
92Burbankite3.5 - 4.0Colorless, grayish yellow, pale yellow, pink, pale greenish.Transparent, TranslucentHexagonal0.003
93Hardystonite3.0 - 4.0light brownish white, pale greyish-white, whitish, very pale pinkishOpaqueTetragonal0.003
94Powellite3.5 - 4.0Yellow, straw-yellow, yellow-brown, brown, greenish yellow, grey, blue or black, colourless, black material is deep blue in transmitted light.Transparent, TranslucentTetragonal0.002
95Hingganite-(Y)6.0 - 7.0Monoclinic0.002
96Columbite-(Fe)6.0Black to brownish blackOpaqueOrthorhombic0.002
97Anorthite6.0 - 6.5Colourless, reddish grey, whiteTransparent, TranslucentTriclinic0.002
98Hambergite7.5Colourless, greyish, yellowish, colourless in transmitted lightTransparent, TranslucentOrthorhombic0.002
99Triphylite4.0Brown-green, light green-gray, may appear blue-gray, colourless to pale yellow in transmitted light.TranslucentOrthorhombic0.002
100Hibonite7.5 - 8.0Black to brownisk blackOpaqueHexagonal0.002