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 721–840 of 862 gray rocks (page 7 of 8).
Smithsonitecommonmineral · Mohs 4-4.5white, gray, green
Smoky Quartzcommonmineral · Mohs 7brown, gray, black
Smythiteraremineral · Mohs 3.5bronze, brown, gray- No imageSnakeskin 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
Sponge Fossilcommonfossil · Mohs 2.5-7gray, white, tan
Spongescommonfossil · Mohs 3-5white, gray, brown
Spurriteuncommonmineral · Mohs 5colorless, white, gray
Stanfielditeraremineral · 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 6.5-7colorless, white, gray- No imageStony Meteoriterarefossil · Mohs 5-7gray, brown, black
- No imageStripped Agatecommonmineral · Mohs 6.5-7white, gray, blue
- No imageStromatoporioidscommonfossil · 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
Sudoiteuncommonmineral · Mohs 2.5-3white, gray, greenish
Sueviteuncommonigneous · Mohs 5-6gray, brown, greenish
Sulfoboriteraremineral · Mohs 3.5white, colorless, yellowish- No imageSweetwater Agatecommonmineral · Mohs 6.5-7clear, white, gray
Swineforditeraremineral · Mohs 1.5-2white, pale pink, gray
Syenitecommonigneous · Mohs 6gray, pink, white
Synchysite-(Ce)uncommonmineral · Mohs 4.5yellow, brown, gray
Szaibelyiteuncommonmineral · Mohs 3-4white, gray, yellowish-white
Szaibélyiteuncommonmineral · Mohs 3.5white, gray, yellowish
Tabulate Coralcommonfossil · Mohs 5-7tan, brown, gray
Taeniteraremineral · Mohs 5-5.5silver-white, gray
Talccommonmineral · Mohs 1white, gray, green
Tantalcarbideraremineral · Mohs 9-10gray, gray, black- Tantalcarbideraremineral · Mohs 9-10gray, gray, black
- No imageTantiteraremineral · Mohs 5colorless, white, gray
Tenoritecommonmineral · Mohs 3-4black, gray
Tephroiteuncommonmineral · Mohs 6reddish-brown, gray, olive-green
Teredo Petrified Woodcommonfossil · Mohs 6.5-7brown, tan, gray
Terrywallaceiteraremineral · Mohs 2.5black, gray- No imageTestibiopalladiteraremineral · Mohs 5white, gray
Tetrataeniteraremineral · Mohs 5-5.5silver-white, gray
Thalénite-(Y)raremineral · Mohs 6.5pink, flesh-red, gray
Thénarditecommonmineral · Mohs 2.5-3colorless, white, gray
Thermonatritecommonmineral · Mohs 1-1.5white, gray, yellow
Thortveititeraremineral · Mohs 6-7grayish-green, gray, greenish-white
Thundereggscommonmineral · Mohs 6.5-7multicolored, brown, gray
Tincalconitecommonmineral · Mohs 2white, colorless, gray- No imageTischendorfiteraremineral · Mohs 3-4white, gray
Tistariteraremineral · Mohs 9blue, colorless, gray
Titaniteuncommonmineral · Mohs 5-5.5yellow, brown, green- No imageTitanomaghemitecommonmineral · Mohs 5-6black, brownish-black, gray
Tolovkiteraremineral · Mohs 3.5white, gray
Tongbaiteraremineral · Mohs 8-9white, gray
Tosuditeuncommonmineral · Mohs 1.5-2white, gray, yellow
Toyohaiteraremineral · Mohs 3.5gray, black
Treasuriteraremineral · Mohs 3.5colorless, white, gray- No imageTrembathiteraremineral · Mohs 7colorless, white, gray
Tremolitecommonmineral · Mohs 5-6white, gray, green
Tridymiteuncommonmineral · Mohs 6.5colorless, white, gray- No imageTrikalsiliteraremineral · Mohs 6colorless, white, gray
Trilobite Fossilscommonfossil · Mohs 3-5black, brown, gray
Trilobitescommonfossilbrown, gray, black
Trinephelineraremineral · Mohs 5.5-6colorless, white, gray
Tripolicommonmineral · Mohs 1-2white, gray, yellow
Trogtaliteraremineral · Mohs 4.5-5gray, dark gray, black
Tronacommonmineral · Mohs 2.5-3white, gray, yellow- No imageTrüstedtiteraremineral · Mohs 4.5-5pinkish-white, gray
Tsaregorodtseviteraremineral · Mohs 6colorless, white, gray
Tsikourasiteraremineral · Mohs 4silver-white, gray- No imageTube Agatecommonmineral · Mohs 6.5-7white, gray, blue
Tubulitecommonfossil · Mohs 3-4gray, brown, white
Tučekiteraremineral · Mohs 3.5white, gray
Tufacommonsedimentary · Mohs 3white, gray, yellow
Tuffcommonigneous · Mohs 2-4white, gray, tan
Tugtupiteraremineral · Mohs 4pink, red, white
Turritella Agatecommonfossil · Mohs 6.5-7brown, tan, gray
Tyretskiteraremineral · Mohs 3.5white, colorless, gray
Tyrrelliteraremineral · Mohs 3.5-4gray, steel gray
Uakititeraremineral · Mohs nullgray, white
Uchucchacuaiteraremineral · Mohs 3.5gray, lead-gray- No imageUngavaiteraremineral · Mohs 3-3.5gray, white
Uraniniteuncommonmineral · Mohs 5-6black, brownish-black, gray
Uraniumraremineral · Mohs 6silvery-white, gray- No imageUranium Oreuncommonmineral · Mohs 5-6black, brown, gray
Urvantseviteraremineral · Mohs 2.5-3white, gray
Valentiniteuncommonmineral · Mohs 2.5-3white, colorless, gray- No imageVanderheydeniteraremineral · Mohs 3white, colorless, gray
Vanthoffiteraremineral · Mohs 3.5colorless, white, gray
Vaughaniteraremineral · Mohs 2-3white, gray- No imageVavříniteraremineral · Mohs 3.5white, gray
Veeniteraremineral · Mohs 2.5-3lead-gray, gray- No imageVelikiteraremineral · Mohs 3.5gray, brownish-gray
Vertebrate Fossilscommonfossil · Mohs 3-6brown, tan, black
Vincentiteraremineral · Mohs 3.5gray, white
Vinogradoviteraremineral · Mohs 2-3white, colorless, gray
Vishneviteraremineral · Mohs 5-6white, gray, yellow
Volcanic Ashcommonigneousgray, brown, black
Volkovskiteraremineral · Mohs 3.5colorless, white, gray
Vysotskiteraremineral · Mohs 4-5gray, grayish white- No imageWeberiteraremineral · Mohs 3.5colorless, white, gray
Wegscheideriteraremineral · Mohs 3white, colorless, gray
Welded Tuffcommonigneous · Mohs 3-6gray, tan, pink- No imageWerneritecommonmineral · Mohs 5.5-6white, gray, yellow
Westervelditeraremineral · Mohs 5-6white, silver-white, gray
Identify your find on the go
Open RockHoundR to look up rock properties offline and find more like this near you.
