Gray rocks & minerals
Gray rocks and minerals are extremely common in the field. Hardness, density, and how the specimen breaks (fracture vs. cleavage) tell you more than color alone.
Showing 361–480 of 805 gray rocks (page 4 of 7).
Iris Agateraremineral · Mohs 6.5-7colorless, white, gray
Iron Orecommonmineral · Mohs 5-6.5red, black, brown
Itacolumiteuncommonsedimentary · Mohs 6-7yellow, brown, tan- No imageJaipuriteraremineral · Mohs 5.5gray, silver-white
Jarliteraremineral · Mohs 3.5-4colorless, white, gray
Jasp-Agatecommonmineral · Mohs 6.5-7red, yellow, brown
Jaspilitecommonsedimentary · Mohs 6-7red, gray, silver- No imageJasrouxiteraremineral · Mohs 2.5-3gray, dark gray, lead-gray
- No imageJedwabiteraremineral · Mohs 3.5-4silver-white, gray
Juonniiteraremineral · Mohs 3-4bright orange, pale yellow, yellowish brown
Kaatialaiteraremineral · Mohs 2white, gray, greenish-white- No imageKalgoorlieiteraremineral · Mohs 2-3white, gray
Kaliniteuncommonmineral · Mohs 2white, colorless, gray
Kaliophiliteraremineral · Mohs 6white, colorless, yellowish
Kalsiliteraremineral · Mohs 6colorless, white, gray- No imageKalungaiteraremineral · Mohs 5-6white, gray
Kamiokiteraremineral · Mohs 5-6black, gray
Karliteraremineral · Mohs 6colorless, white, gray
Kegeliteraremineral · Mohs 2.5white, gray, colorless- No imageKeldyshiteraremineral · Mohs 3.8white, colorless, gray
Keokuk Geodecommonmineral · Mohs 7clear, white, gray
Kerniteuncommonmineral · Mohs 2.5-3colorless, white, gray- No imageKeutschiteraremineral · Mohs 3-4gray, black
Khamrabaeviteraremineral · Mohs 8-9gray, silver-gray- No imageKharaelakhiteraremineral · Mohs 3.5-4gray, brownish-gray
- No imageKieftiteraremineral · Mohs 3.5silver-white, gray
Knightiacommonfossiltan, brown, gray- No imageKonderiteraremineral · Mohs 4.5-5white, gray
Kotoiteraremineral · Mohs 6.5white, gray, yellow
Kotulskiteraremineral · Mohs 2.5white, gray, pinkish-white
Kruťaiteraremineral · Mohs 3.5gray, silver-white
Kuksiteraremineral · Mohs 3-4gray- No imageKuramiteraremineral · Mohs 5gray, blackish-gray
- No imageKurgantaiteraremineral · Mohs 6-6.5white, colorless, gray
- No imageKuzminiteraremineral · Mohs 2.5white, gray
Kyanitecommonmineral · Mohs 4.5-7blue, colorless, white
Kyanite Bladecommonmineral · Mohs 4.5-7blue, white, gray
Labradoritecommonmineral · Mohs 6-6.5gray, gray-green, blue- No imageLaflammeiteraremineral · Mohs 1.5-2white, gray
- No imageLaforêtiteraremineral · Mohs 3.5gray, white
Lake Superior Agatecommonmineral · Mohs 6.5-7red, orange, yellow
Lamproiterareigneousgray, greenish-gray, brown
Langbeiniteuncommonmineral · Mohs 3.5-4colorless, white, gray- No imageLarniteraremineral · Mohs 6white, colorless, gray
Larvikitecommonigneous · Mohs 6gray, blue, black- No imageLaurentianiteraremineral · Mohs 5-6white, colorless, gray
Lawsoniteuncommonmineral · Mohs 6colorless, white, bluish-gray- No imageLead Ironraremineral · Mohs 2.5-3gray, lead-gray, black
Lechatelieriteuncommonmineral · Mohs 5.5-6.5colorless, white, gray- No imageLenaiteraremineral · Mohs 4-4.5silver-white, gray
Letoviciteraremineral · Mohs 2colorless, white, yellowish
Leucitecommonmineral · Mohs 5.5-6white, gray, colorless- No imageLimb Castcommonfossil · Mohs 7clear, white, gray
Limestonecommonsedimentary · Mohs 3white, gray, tan
Linzhiiteraremineral · Mohs 6.5silvery white, gray
Lisetiteraremineral · Mohs 6white, colorless, gray- No imageLiuiteraremineral · Mohs 6-7silver-white, gray
Lizarditecommonmineral · Mohs 2.5-3green, yellow-green, white
Llaniterareigneous · Mohs 6-7brown, reddish-brown, gray
Lorenzeniteraremineral · Mohs 6brown, reddish-brown, gray
Loughliniteraremineral · Mohs 2white, gray- No imageLouisiana Opaluncommonmineral · Mohs 5.5-6brown, tan, gray
Lovozeriteraremineral · Mohs 5pink, brown, black
Luanheiteraremineral · Mohs 3.5silver-white, gray- No imageLukkulaisvaaraiteraremineral · Mohs 3-4gray
- No imageLunijianlaiteraremineral · Mohs 2-3white, gray, pale yellow
Luobusaiteraremineral · Mohs 7white, gray, silver-white- No imageLuxembourgiteraremineral · Mohs 3gray
Luzoniteuncommonmineral · Mohs 3.5pinkish-brown, reddish-brown, gray
Mackinawiteuncommonmineral · Mohs 2.5bronze, yellowish-brown, gray
Magnesiochloritoidraremineral · Mohs 6.5dark green, black, gray- No imageMagnesiorowlandite-(Y)raremineral · Mohs 5-5.5gray, white
Magnesitecommonmineral · Mohs 3.5-4.5white, gray, yellow- No imageMagnesium Carbonatecommonmineral · Mohs 3.5-4.5white, colorless, gray
- No imageMajzlaniteraremineral · Mohs 2.5gray
Mammoth Toothcommonfossil · Mohs 2.5-3tan, brown, cream
Manatee Bonecommonfossil · Mohs 3-5tan, brown, gray- No imageManganoquadratiteraremineral · Mohs 3colorless, white, gray
Marblecommonmetamorphic · Mohs 3-4white, gray, black
Marcasitecommonmineral · Mohs 6-6.5pale brass-yellow, tin-white, gray
Margariteuncommonmineral · Mohs 3.5-4pink, white, yellow
Marialiteuncommonmineral · Mohs 5.5-6colorless, white, gray
Marićiteraremineral · Mohs 4-5colorless, white, gray
Mascagniteuncommonmineral · Mohs 2.5white, yellow, gray
Masloviteraremineral · Mohs 4.5-5white, gray
Mastodon Toothuncommonfossil · Mohs 3-5brown, tan, black
Matrix Opalcommongemstone · Mohs 5.5-6.5multicolored, brown, black- No imageMatsubaraiteraremineral · Mohs 5-6gray
- No imageMattagamiteraremineral · Mohs 3.5white, gray
Maucheriteraremineral · Mohs 5copper-red, silver-white, gray- No imageMavlyanoviteraremineral · Mohs 7white, gray
- No imageMazzettiiteraremineral · Mohs 2.5-3black, gray
Megalodon Toothcommonfossil · Mohs 3-5black, gray, brown
Meioniteuncommonmineral · Mohs 5.5-6white, colorless, yellow
Melaconitecommonmineral · Mohs 3black, gray- No imageMelliniiteraremineral · Mohs 8-8.5white, gray
Merwiniteraremineral · Mohs 6colorless, white, pale green
Mesosideriterareigneous · Mohs 5-6silver, gray, black
Metacinnabaruncommonmineral · Mohs 3black, gray, brownish-black
Meteoriterareigneous · Mohs 5-8black, brown, gray
Mgriiteraremineral · Mohs 4.5white, gray
Miassiteraremineral · Mohs 5-6silver-white, gray
Mica Schistcommonmetamorphic · Mohs 3-6silver, gray, black
Microclinecommonmineral · Mohs 6white, gray, yellow
Migmatitecommonmetamorphic · Mohs 5-7black, white, gray
Millosevichiteraremineral · Mohs 2-3indigo, bright red, brick-red- No imageMilotaiteraremineral · Mohs 4.5gray, white
Modderiteraremineral · Mohs 3.5white, gray
Mogániteuncommonmineral · Mohs 6gray, white, colorless
Monetiteraremineral · Mohs 3.5white, colorless, gray- No imageMonipiteraremineralgray
Monohydrocalciteraremineral · Mohs 3white, colorless, gray
Montana Agatecommonmineral · Mohs 6.5-7yellow, orange, brown
Montana Moss Agatecommonmineral · Mohs 6.5-7clear, white, gray
Montebrasiteuncommonmineral · Mohs 5.5-6white, colorless, yellow
Monticelliteuncommonmineral · Mohs 5colorless, white, gray
Montmorillonitecommonmineral · Mohs 1-2white, gray, yellow
Monzonitecommonigneous · Mohs 6-7gray, light gray, pinkish gray
Moonstonecommongemstone · Mohs 6white, colorless, blue
Mosasaur Toothcommonfossil · Mohs 3-5black, brown, tan
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