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 601–720 of 805 gray rocks (page 6 of 7).
Puddingstonecommonsedimentarymulticolored, gray, red
Pumicecommonigneous · Mohs 5.5-6white, gray, cream- No imagePutziteraremineral · Mohs 2.5-3gray, silver-white
Pyromorphiteuncommonmineral · Mohs 3.5-4green, yellow, brown
Pyrophyllitecommonmineral · Mohs 1-2white, gray, pale green
Pyroxenecommonmineral · Mohs 5-6black, dark green, brown
Quadratiteraremineral · Mohs 3.5reddish, gray
Quartzcommonmineral · Mohs 7colorless, white, gray- No imageQuartz Concretioncommonmineral · Mohs 7white, gray, brown
Quartz Geodecommonmineral · Mohs 7colorless, white, purple
Quartzitecommonmetamorphic · Mohs 7white, gray, pink- No imageRadhakrishnaiteraremineral · Mohs 2-3white, gray
Ramsdelliteuncommonmineral · Mohs 3black, gray
Rectoriteuncommonmineral · Mohs 2-3white, gray, yellowish
Rhabdophane-(Ce)uncommonmineral · Mohs 3.5white, yellow, pink- No imageRhabdophane-(La)raremineral · Mohs 3.5white, gray, yellowish
- No imageRhabdophane-(Nd)raremineral · Mohs 3.5pink, white, yellow
- No imageRhabdophane-(Y)raremineral · Mohs 3.5white, gray, yellow
Rheniiteraremineral · Mohs 1.5-2black, gray
Rhodonitecommonmineral · Mohs 5.5-6.5rose-pin k, brownish red, gray- No imageRhomboclaseuncommonmineral · Mohs 2colorless, white, gray
Rhyolitecommonigneous · Mohs 6-7gray, pink, tan- No imageRoalditeraremineral · Mohs 5.5white, gray
Rock Gypsumcommonmineral · Mohs 2white, gray, colorless
Rockcastle Conglomeratecommonsedimentary · Mohs 6-7gray, white, tan- No imageRogermitchelliteraremineral · Mohs 5colorless, gray
Romanèchitecommonmineral · Mohs 5-6black, gray- No imageRuarsiteraremineral · Mohs 5-6silver-white, gray
Rugose Coralcommonfossil · Mohs 3-4white, gray, brown
Sabatieriteraremineral · Mohs 2-3silver-white, gray- No imageSaddlebackiteraremineral · Mohs 2-2.5gray, black
Saffloriteuncommonmineral · Mohs 4.5-5tin-white, silver-white, gray
Salammoniacuncommonmineral · Mohs 1.5-2white, yellow, gray
Sand Dollar Fossilcommonfossil · Mohs 3white, tan, gray
Sandstonecommonsedimentary · Mohs 6-7tan, brown, yellow
Sanidinecommonmineral · Mohs 6colorless, white, gray
Saponitecommonmineral · Mohs 2white, gray, yellowish
Sapphirineraremineral · Mohs 7.5blue, blue-green, green
Sassoliteuncommonmineral · Mohs 1white, colorless, yellowish
Satin Sparcommonmineral · Mohs 2white, colorless, gray
Scapolitecommonmineral · Mohs 5.5-6colorless, white, gray
Schistcommonmetamorphic · Mohs 3-6silver, gray, black- No imageSchöllhorniteraremineral · Mohs 2gray
Sea Urchin Fossilcommonfossil · Mohs 3-5white, gray, tan
Searlesiteuncommonmineral · Mohs 3.5white, colorless, gray
Selenitecommonmineral · Mohs 2colorless, white, gray- No imageSeleniumraremineral · Mohs 2gray, red
- No imageSelenojalpaiteraremineral · Mohs 4-4.5black, gray
- No imageSenandoriteraremineral · Mohs 3-4gray, dark gray, black
Senarmontiteuncommonmineral · Mohs 2.5white, colorless, gray
Sepiolitecommonmineral · Mohs 2-2.5white, gray, yellow
Septarian Nodulecommonsedimentary · Mohs 3-5brown, yellow, gray
Serendibiteraremineral · Mohs 6.5-7blue, blue-green, black
Shalecommonsedimentary · Mohs 2-3gray, black, red
Shark Toothcommonfossil · Mohs 3-5black, brown, gray
Shocked Quartzraremineral · Mohs 7clear, white, gray- No imageShuangfengiteraremineral · Mohs 5.5silver-white, gray
Sibirskiteraremineral · Mohs 3-4white, colorless, gray
Sideritecommonmineral · Mohs 3.5-4yellow, brown, gray
Siliceous Oolitecommonsedimentary · Mohs 6.5-7white, gray, tan
Silicified Agatecommonfossil · Mohs 6.5-7multicolored, white, gray
Silicified Algaecommonfossil · Mohs 6.5-7tan, brown, gray
Silicified Coralcommonfossil · Mohs 6.5-7white, gray, brown
Silicified Ferncommonfossil · Mohs 6.5-7brown, black, gray
Silicified Fossilcommonfossil · Mohs 6.5-7brown, red, yellow
Silicified Lignitecommonfossil · Mohs 6.5-7brown, black, gray
Silicified Mastodon Tuskrarefossil · Mohs 6.5-7white, cream, tan
Silicified Oolitecommonfossil · Mohs 6.5-7white, gray, brown
Silicified Pine Coneuncommonfossil · Mohs 6.5-7brown, tan, gray
Silicified Woodcommonfossil · Mohs 6.5-7brown, red, yellow
Silkstonecommonmineral · Mohs 7white, gray, yellow
Sillimanitecommonmineral · Mohs 6.5-7.5white, colorless, gray
Siltstonecommonsedimentary · Mohs 3-4gray, red, brown
Silveruncommonmineral · Mohs 2.5-3silver-white, gray, black- No imageSinoiteraremineral · Mohs 5.5white, colorless, gray
Skinneriteraremineral · Mohs 2.5-3gray, black
Skutteruditeuncommonmineral · Mohs 5.5-6tin-white, silver-white, gray
Slatecommonmetamorphic · Mohs 2.5-4gray, black, green
Slawsoniteraremineral · Mohs 6colorless, white, gray
Smithsonitecommonmineral · Mohs 4-4.5white, gray, green
Smoky Quartzcommonmineral · Mohs 7brown, gray, black
Smythiteraremineral · Mohs 3.5bronze, brown, gray
Snakeskin Agatecommonmineral · Mohs 6.5-7white, gray, tan
Soapstonecommonmetamorphic · Mohs 1gray, green, white
Sodalitecommonmineral · Mohs 5.5-6blue, white, gray- No imageSoučekiteraremineral · Mohs 3.5gray, lead-gray
Spenceriteraremineral · Mohs 2.5white, colorless, gray- No imageSphaerobismoiteraremineral · Mohs 3.5white, yellowish-white, gray
- No imageSpherulitic Chertcommonmineral · Mohs 6.5-7white, gray, tan
Spodumeneuncommonmineral · Mohs 6.5-7colorless, white, gray
Spongecommonfossil · Mohs 3-5white, gray, brown
Sponge Fossilcommonfossil · Mohs 2.5-7gray, white, tan
Spurriteuncommonmineral · Mohs 5colorless, white, gray
Star Sapphireraregemstone · Mohs 9blue, gray, violet
Starfish Fossiluncommonfossilgray, brown, tan
Staurolite Schistcommonmetamorphic · Mohs 3.5-7dark brown, gray, brownish-black
Steacyiteraremineral · Mohs 5yellow, brown, gray
Steatitecommonmineral · Mohs 1gray, green, white- No imageSteinhardtiteraremineral · Mohs 3.5silver-white, gray
Stenoniteraremineral · Mohs 3.5colorless, white, gray
Stevensiteuncommonmineral · Mohs 1-2white, gray, yellowish
Stibarsenraremineral · Mohs 3.5tin-white, gray
Stibiconitecommonmineral · Mohs 5-5.5yellow, white, colorless- No imageStibiocolusiteraremineral · Mohs 3.5gray, brownish-gray
Stishoviteraremineral · Mohs 9.5colorless, white, gray
Stony Meteoriterarefossil · Mohs 5-7gray, brown, black
Stromatoporioidcommonfossil · Mohs 3-5tan, brown, gray- No imageStronadelphiteraremineral · Mohs 5colorless, white, gray
Strontianitecommonmineral · Mohs 3.5colorless, white, gray
Strontioboriteraremineral · Mohs 3.5colorless, white, gray- No imageStrontiohurlbutiteraremineral · Mohs 6colorless, white, gray
Stumpfliteraremineral · Mohs 3white, gray
Suaniteraremineral · Mohs 5.5white, colorless, gray
Sueviteuncommonigneous · Mohs 5-6gray, brown, greenish
Sulfoboriteraremineral · Mohs 3.5white, colorless, yellowish
Sweetwater Agatecommonmineral · Mohs 6.5-7clear, white, gray
Syenitecommonigneous · Mohs 6gray, pink, white
Synchysite-(Ce)uncommonmineral · Mohs 4.5yellow, brown, gray
Szaibélyiteuncommonmineral · Mohs 3.5white, gray, yellowish
Tabulate Coralcommonfossil · Mohs 5-7tan, brown, gray
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