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 481–600 of 805 gray rocks (page 5 of 7).
Mozarkitecommonmineral · Mohs 6.5-7red, pink, white
Mudstonecommonsedimentary · Mohs 2-3gray, brown, red
Mulliteuncommonmineral · Mohs 6-7white, gray, colorless- No imageMurashkoiteraremineral · Mohs 5-6silver-white, gray
- No imageMurchisiteraremineral · Mohs 2.5-3white, colorless, gray
Murmaniteraremineral · Mohs 2-3violet, brown, pink- No imageMutnovskiteraremineral · Mohs 1.5-2gray, white
Mylonitecommonmetamorphic · Mohs 5-7gray, black, white
Nagelschmidtiteraremineral · Mohs 5white, colorless, gray
Nahcoliteuncommonmineral · Mohs 2.5white, colorless, gray
Nantokiteraremineral · Mohs 2-2.5colorless, white, gray
Nasledoviteraremineral · Mohs 2white, gray, pale yellow
Nasoniteraremineral · Mohs 4colorless, white, yellowish- No imageNative Aluminiumraremineral · Mohs 1.5white, silver-white, gray
- No imageNative Cadmiumraremineral · Mohs 2-2.5white, gray
- No imageNative Iridiumraremineral · Mohs 6.5silver-white, tin-white, gray
- No imageNative Nickelraremineral · Mohs 5silver-white, gray
- No imageNative Osmiumraremineral · Mohs 7silver-white, bluish-white, gray
- No imageNative Rutheniumraremineral · Mohs 6.5white, silver-white, gray
- No imageNative Seleniumraremineral · Mohs 2gray, red, black
- No imageNative Siliconraremineral · Mohs 7gray, blue-gray, black
- No imageNative Tinraremineral · Mohs 1.5silvery-white, gray
- No imageNative Tungstenraremineral · Mohs 7.5gray, white
- No imageNative Zincraremineral · Mohs 2silver-white, gray, bluish-white
Natriteraremineral · Mohs 3.5colorless, white, gray
Natrolitecommonmineral · Mohs 5-5.5white, colorless, gray- No imageNatroncommonmineral · Mohs 1-1.5colorless, white, gray
Nautiloidcommonfossilbrown, gray, white
Nekrasoviteraremineral · Mohs 4.5pinkish-brown, gray
Nephelinecommonmineral · Mohs 5.5-6white, gray, yellowish
Nepheline Syenitecommonigneous · Mohs 5.5-6gray, white, pink
Nephritecommonmineral · Mohs 6-6.5green, white, yellow
Nephrite Jadecommonmineral · Mohs 6-6.5green, white, yellow
Nickelraremineral · Mohs 4silver-white, gray
Nickelskutteruditeuncommonmineral · Mohs 5.5-6tin-white, silver-white, gray- No imageNiningeriteraremineral · Mohs 3.5-4dark brown, black, gray
Nisbiteraremineral · Mohs 5-6white, tin-white, gray
Niteruncommonmineral · Mohs 2white, colorless, gray
Nitrocalcitecommonmineral · Mohs 1.5-2white, colorless, gray
Nodulecommonsedimentarygray, brown, black
Nodules Filled With Opalcommonfossil · Mohs 5.5-6.5white, gray, brown
Norsethiteraremineral · Mohs 3.5white, colorless, gray
Northupiteuncommonmineral · Mohs 3.5-4white, gray, yellow
Noseanuncommonmineral · Mohs 5-5.5gray, blue, white
Novaculitecommonsedimentary · Mohs 7white, gray, black- No imageNuwaiteraremineral · Mohs 3.5white, gray
- No imageOberthüriteraremineral · Mohs 3.5-4creamy brown, white, gray
Obsidian Nodulecommonmineral · Mohs 5-5.5black, brown, gray
Oldhamiteraremineral · Mohs 4yellowish-brown, brown, gray
Oligoclasecommonmineral · Mohs 6-6.5white, colorless, gray
Oolitecommonsedimentary · Mohs 3white, gray, tan- No imageOolitic Agatecommonmineral · Mohs 6.5-7white, gray, brown
Oolitic Limestonecommonsedimentary · Mohs 3white, tan, gray
Opal-quartzcommonmineral · Mohs 6.5-7white, gray, brown
Orbicular Jaspercommonmineral · Mohs 6.5-7green, yellow, brown
Orthocerascommonfossil · Mohs 3-4black, brown, gray
Orthoclasecommonmineral · Mohs 6white, colorless, flesh-red
Otaviteraremineral · Mohs 3.5white, gray, yellowish
Owyhee Thundereggcommonmineral · Mohs 6.5-7blue, purple, white
Owyheeiteuncommonmineral · Mohs 2.5steel-gray, silver-white, gray
Pabstiteraremineral · Mohs 6white, colorless, gray- No imagePalladobismutharsenideraremineral · Mohs 3.5white, gray
- No imagePalladosilicideraremineral · Mohs 5-5.5silver-white, gray
Palladseiteraremineral · Mohs 3-4white, gray- No imagePalmieriteraremineral · Mohs 3colorless, white, gray
Palygorskitecommonmineral · Mohs 2-3white, gray, yellowish-white
Paracelsianraremineral · Mohs 6colorless, white, gray
Paracostibiteraremineral · Mohs 3.5-4white, gray
Paragonitecommonmineral · Mohs 2.5colorless, white, yellowish- No imagePararsenolampriteraremineral · Mohs 1.5-2gray, silvery-gray, black
- No imagePašavaiteraremineral · Mohs 2gray
Pavoniteraremineral · Mohs 2gray, lead-gray
Paxiteraremineral · Mohs 3.5silver-white, gray
Pectoliteuncommonmineral · Mohs 4.5-5white, gray, pale green
Pegmatitecommonigneous · Mohs 6-7white, gray, pink
Perhamiteraremineral · Mohs 5colorless, white, gray
Perlitecommonigneous · Mohs 5-5.5gray, white, greenish
Perthitecommonmineral · Mohs 6white, gray, pink- No imagePertsevite-(F)raremineral · Mohs 5-6brown, colorless, gray
Petaliteuncommonmineral · Mohs 6-6.5colorless, white, gray
Petersenite-(Ce)raremineral · Mohs 3.5colorless, white, gray
Petoskey Stonecommonfossil · Mohs 3-4gray, brown, tan
Petrified Algaecommonfossil · Mohs 6.5-7tan, brown, gray
Petrified Coralcommonfossil · Mohs 6.5-7white, gray, brown
Petrified Cycaduncommonfossil · Mohs 6.5-7brown, tan, black
Petrified Palmcommonfossil · Mohs 6.5-7brown, tan, black
Petrified Palm Woodcommonfossil · Mohs 6.5-7tan, brown, black
Phacopscommonfossil · Mohs 3-5brown, gray, black
Phantom Quartzcommonmineral · Mohs 7colorless, white, gray
Phosgeniteraremineral · Mohs 2.5-3colorless, white, gray
Phosphoritecommonsedimentary · Mohs 3-5gray, brown, black- No imagePieczkaiteraremineral · Mohs 5gray
Pietersiteuncommonmineral · Mohs 6.5-7blue, gold, brown
Pink Rhodonitecommonmineral · Mohs 5.5-6.5pink, reddish-pink, brown
Pirquitasiteraremineral · Mohs 3.5-4black, gray
Plagioclasecommonmineral · Mohs 6-6.5white, gray, colorless
Plant Fossilcommonfossilbrown, black, gray
Platinum Nuggetraremineral · Mohs 4-4.5silvery-white, gray
Plumboferriteraremineral · Mohs 5-6black, gray
Plumbogummiteuncommonmineral · Mohs 4-5colorless, white, gray
Plumbophylliteraremineral · Mohs 2-3white, colorless, gray
Plume Agatecommonmineral · Mohs 6.5-7white, gray, brown
Polariteraremineral · Mohs 4-5white, gray- No imagePolekhovskyiteraremineral · Mohs 5-6white, gray
Polluciteuncommonmineral · Mohs 6.5colorless, white, gray
Polydymiteraremineral · Mohs 4.5-5.5gray, grayish-white
Polyhalitecommonmineral · Mohs 2.5-3colorless, white, gray- No imagePompom Agatecommonmineral · Mohs 6.5-7white, gray, brown
Powelliteuncommonmineral · Mohs 3.5yellow, brown, greenish-yellow
Prehnitecommonmineral · Mohs 6-6.5green, yellow-green, white
Priday Thundereggcommonfossil · Mohs 6.5-7red, brown, white- No imageProberiteuncommonmineral · Mohs 3.5white, colorless, gray
Probertiteuncommonmineral · Mohs 3.5colorless, white, gray
Prosopiteuncommonmineral · Mohs 4.5white, colorless, gray
Proto-anthophylliteraremineral · Mohs 5.5-6gray, brown, green- No imageProtoenstatiteraremineral · Mohs 5.5colorless, white, gray
- No imageProtozoa Agateuncommonfossil · Mohs 6.5-7brown, red, yellow
- No imageProxidecagoniteraremineral · Mohs 6-7gray, black
Pseudowollastoniteraremineral · Mohs 4.5-5white, colorless, gray
Psilomelanecommonmineral · Mohs 5-6black, bluish-black, gray
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