# Mineral Hardness Color Transparency Crystal System Probability See More
1Margarosanite2.5 - 3.0Colorless, grayish-white (due to included native lead)Transparent, TranslucentTriclinic0.031
2Germanite4.0Pale greyish-pinkOpaqueIsometric0.03
3Chromite5.5BlackTranslucent, OpaqueIsometric0.029
4Vonsenite5.0Black, greenish blackOpaqueOrthorhombic0.026
5Ludwigite5.0Dark-green to blackOpaqueOrthorhombic0.023
6Pentlandite3.5 - 4.0Pale bronze-yellow, bronze, brown, reddish brown when argentianOpaqueIsometric0.017
7Kaersutite5.0 - 6.0Dark brown to blackMonoclinic0.016
8Dypingite2.0 - 3.0WhiteMonoclinic0.016
9Triplite5.0 - 5.5Brown, red-brown, dark brown, black (altered), light brownish u=yellow to dark reddish brown in transmitted light.OpaqueMonoclinic0.015
10Lindgrenite4.5Green, yellowish green, pale green to yellow-green in transmitted lightTransparentMonoclinic0.015
11Sincosite1.0 - 2.0Grass-green, yellow- to olive-green, brownish green, blue-green, light green, olive-green, brownish green, yellowish green, bluish green in transmitted light.Transparent, TranslucentTetragonal0.012
12Sussexite3.0White, lilac / lavender, black (perhaps due to alteration or inclusions), also golden-brown, colourless in transmitted lightTransparent, TranslucentOrthorhombic0.011
13Renierite4.0 - 5.0Orange-bronze, tarnishes reddishOpaqueTetragonal0.01
14Barylite7.0bluish white, colourlessOrthorhombic0.01
15Straczekite1.0 - 2.0Green-blackMonoclinic0.01
16Actinolite5.0 - 6.0Green, green-black, grey-green, or blackTransparent, TranslucentMonoclinic0.01
17Antimony3.0 - 3.5Tin-whiteOpaqueTrigonal0.01
18Chloritoid6.5dark green to green-gray or nearly black.TranslucentMonoclinic0.009
19Cordierite7.0 - 7.5Grey, blue, blue-violet, greenish, yellowish brown, colourless to very light blue in transmitted light.Transparent, TranslucentOrthorhombic0.009
20Triphylite4.0Brown-green, light green-gray, may appear blue-gray, colourless to pale yellow in transmitted light.TranslucentOrthorhombic0.008
21Fluoro-richterite5.0 - 6.0Brown to brownish-red, rose-red, yellow, grey-brown, also pale to dark green.Monoclinic0.008
22Nakauriite5.0 - 5.5Translucent blueOrthorhombic0.008
23Messelite3.5White, pale gray white, creamy whiteTransparent, TranslucentTriclinic0.008
24Berzelianite2.0Silver-White, shiny lead-grey, easily tarnishes iridescent blue-greyOpaqueIsometric0.008
25Zaratite3.5Emerald-green, green in transmitted light.Transparent, TranslucentIsometric0.008
26Magnesio-hastingsite5.0 - 6.0Green to brownish-greenMonoclinic0.007
27Scainiite3.5 - 4.0Black, bluish metallic with dark red tintOpaqueMonoclinic0.007
28Nickeline5.0 - 5.5Pale copper redOpaqueHexagonal0.007
29Cerchiaraite-(Mn)4.0 - 5.0Deep greenTetragonal0.007
30Pyrochroite2.5 - 3.0Colourless, greenish, bluish (fresh), brown to black (exposed), flesh-red or amethystine in transmitted lightTranslucent, OpaqueTrigonal0.007
31Lorenzenite6.0Pale purple-brown, pale pink to mauve, brown to blackTransparent, OpaqueOrthorhombic0.007
32Purpurite4.0 - 4.5Dark purple to purplish red.OpaqueOrthorhombic0.007
33Sillimanite6.5 - 7.5Colorless, white, yellow, brown, green, gray.Transparent, TranslucentOrthorhombic0.007
34Motukoreaite1.0 - 1.5colorless, white, yellowTranslucentTrigonal0.006
35Cerite-(Ce)5.5Trigonal0.006
36Meneghinite2.5Blackish lead-grayOpaqueOrthorhombic0.006
37Lithiophilite4.0Reddish-brown, yellowish brown, golden-yellow, salmon-orange, colourless to light yellow, pink in transmitted light.Transparent, TranslucentOrthorhombic0.006
38Bementite6.0Brown, dark brown, golden brown, grayish-yellowTranslucentMonoclinic0.006
39Hedenbergite5.5 - 6.5brownish green, blackTransparent, OpaqueMonoclinic0.006
40Orientite4.0 - 5.0Light reddish brown, chocolate-brownTransparent, TranslucentOrthorhombic0.006
41Troilite3.5 - 4.5Gray brown, bronze brown (tarnished), yellow brown, light greyish brown, bronzeOpaqueHexagonal0.006
42Altaite2.0 - 3.0Tin-white with a light yellow tint, yellow-brown, blue (tarnished)OpaqueIsometric0.006
43Hardystonite3.0 - 4.0light brownish white, pale greyish-white, whitish, very pale pinkishOpaqueTetragonal0.006
44Aegirine6.0Dark green to greenish black, reddish brown, blackTransparent, OpaqueMonoclinic0.006
45Pumpellyite-(Al)5.50.005
46Augite5.5 - 6.0Brown-green, black, green-black, brown, purplish brownTranslucent, OpaqueMonoclinic0.005
47Gudmundite5.5 - 6.0OpaqueMonoclinic0.005
48Stilpnomelane3.0 - 4.0Red, brown, black, dark green, dark reddish brown, golden brownTranslucentTriclinic0.005
49Nissonite2.5bluish greenTransparentMonoclinic0.005
50Corundum9.0Colourless, blue, red, pink, yellow, grey, golden-brownTransparent, Translucent, OpaqueTrigonal0.005
51Wodginite5.5Red-brown, dark brown to blackOpaqueMonoclinic0.005
52Keyite2.5blueMonoclinic0.005
53Andalusite6.5 - 7.5Pink to red brown, occasionally yellow, green, white, gray rarely violetTransparent, TranslucentOrthorhombic0.004
54Iron4.5Iron-blackOpaqueIsometric0.004
55Gonnardite4.0 - 5.0Orthorhombic0.004
56Rammelsbergite5.5 - 6.0Tin white with faint pinkish hueOpaqueOrthorhombic0.004
57Anorthite6.0 - 6.5Colourless, reddish grey, whiteTransparent, TranslucentTriclinic0.004
58Stibnite2.0Lead-gray with pale blue tintOpaqueOrthorhombic0.004
59Makatite5.5 - 6.0whiteMonoclinic0.004
60Canavesite2.0Monoclinic0.004
61Tilasite5.0Light gray, violet-gray, pinkish red (LĂ„ngban), olive-green, apple-green (India), colourless or pale green in transmitted light.TranslucentMonoclinic0.004
62Brandtite3.5Colourless, white, pink, colourless in transmitted light.Transparent, TranslucentMonoclinic0.004
63Tephroite6.0Grey, olive-green, flesh red or reddish-brown, dark brown.TranslucentOrthorhombic0.004
64Diopside5.5 - 6.5light to dark green, blue, brown, colourless, snow white, grey, pale violetTransparent, OpaqueMonoclinic0.004
65Antigorite3.5 - 4.0green, green-blue, white, brown, blackTransparentMonoclinic0.004
66Perovskite5.5Dark brown, black, red-brown, yellow shadesTransparent, TranslucentOrthorhombic0.004
67Riebeckite5.0 - 5.5Usually black, also commonly light blue to blue-black, gray-blue, gray, brownTranslucent, OpaqueMonoclinic0.004
68Aenigmatite5.5 - 6.0Velvet-blackTranslucent, OpaqueTriclinic0.004
69Narsarsukite7.0Yellow, yellowish-white, grayish-white, honey-yellow, tan, greenish-yellowTransparent, TranslucentTetragonal0.004
70Staurolite7.0 - 7.5Dark brown, brownish-black, red-brownTranslucentMonoclinic0.004
71Heterosite4.0 - 4.5Untreated mineral is usually Purple Black, also Deep rose to reddish purple, especially when treated in a strong acid solution.OpaqueOrthorhombic0.003
72Calaverite2.5 - 3.0Brass yellow to silver whiteOpaqueMonoclinic0.003
73Selenium2.0Gray to grayish black, reddish gray, redOpaqueTrigonal0.003
74Anthophyllite5.5 - 6.0White, greenish grey, green, clove brown, or brownish greenTransparent, TranslucentOrthorhombic0.003
75Elpidite5.0Colorless, white, gray, yellowish, orange, brown, beigeTransparent, Translucent, OpaqueOrthorhombic0.003
76Brannerite4.5 - 5.5Black, brownish olive-green, yellow-brown to yellow with alteration, yellowish green in transmitted lightOpaqueMonoclinic0.003
77Polycrase-(Y)5.0 - 6.0BlackOrthorhombic0.003
78Ashcroftine-(Y)5.0PinkTransparentTetragonal0.003
79Ullmannite5.0 - 5.5Tin-white, steel greyOpaqueIsometric0.003
80Glaucophane5.0 - 6.0Grey to lavender-blue.Monoclinic0.003
81Uvarovite6.5 - 7.0Green, emerald-green, green-blackTransparent, TranslucentIsometric0.003
82Barbosalite5.5 - 6.0Black to dark blue-green, green, Blue green, Green blue, Greenish black, BlackTranslucent, OpaqueMonoclinic0.003
83Artinite2.5White, colourless in transmitted light.TransparentMonoclinic0.003
84Sengierite2.5Olive-green, yellowish greenTransparentMonoclinic0.003
85Phillipsite-K4.0 - 5.0WhiteMonoclinic0.003
86Vandenbrandeite4.0Blackish green to dark green with bluish green tintTransparent, TranslucentTriclinic0.003
87Kanonaite6.5Greenish blackTransparent, TranslucentOrthorhombic0.003
88Loparite-(Ce)5.50.003
89Tacharanite5.0WhiteTranslucentMonoclinic0.003
90Gadolinite-(Y)6.5 - 7.0Black, greenish-black, brownOpaqueMonoclinic0.003
91Hedyphane4.0 - 5.0White, yellowish white, buff, bluish, colourless in transmitted light.Hexagonal0.003
92Colusite3.0 - 4.0Bronze, pinkish bronzeOpaqueIsometric0.003
93Arsenolite1.5White, bluish, reddish to yellowish if impure with realgar or orpiment, colourless in transmitted lightTransparentIsometric0.003
94Arfvedsonite5.0 - 6.0Bluish-black to black.Translucent, OpaqueMonoclinic0.003
95Breithauptite5.5Copper-red with a violet tintOpaqueHexagonal0.003
96Whitmoreite3.0Yellow-brown, green-brownTranslucentMonoclinic0.003
97Cobaltite5.5Reddish silver white, violet steel gray, or black.OpaqueOrthorhombic0.003
98Umangite3.0Red, bluish red-black, iridescent violet-blue (tarnished)OpaqueTetragonal0.003
99Kentrolite5.0Black, sometimes with dark red internal reflectionsTranslucentOrthorhombic0.003
100Pectolite4.5 - 5.0Colourless, white, pale pink, greenish, pale blueTransparent, TranslucentTriclinic0.002