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 721–805 of 805 gray rocks (page 7 of 7).
Taeniteraremineral · Mohs 5-5.5silver-white, gray
Talccommonmineral · Mohs 1white, gray, green
Tantalcarbideraremineral · Mohs 6-7gray, gray, black- Tantalcarbideraremineral · Mohs 6-7gray, gray, black
- No imageTantiteraremineral · Mohs 7colorless, 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 3.5-4white, 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
Thundereggcommonmineral · Mohs 6.5-7multicolored, brown, gray
Tincalconitecommonmineral · Mohs 2white, colorless, gray- No imageTischendorfiteraremineral · Mohs 3-4white, gray
- No imageTistariteraremineral · Mohs 9blue, colorless, gray
Titaniteuncommonmineral · Mohs 5-5.5yellow, brown, green- No imageTitanomaghemitecommonmineral · Mohs 5-6black, brownish-black, gray
Tolovkiteraremineral · Mohs 3.5white, gray
Tosuditeuncommonmineral · Mohs 1.5-2white, gray, yellow
Toyohaiteraremineral · Mohs 4gray- No imageTranquillityiteraremineral · Mohs 5-6gray
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
Trilobitecommonfossilbrown, gray, black
Trilobite Fossilcommonfossil · Mohs 3-5black, brown, gray
Trinephelineraremineral · Mohs 5.5-6colorless, white, gray- No imageTripolicommonmineral · Mohs 1-2white, gray, yellow
Tronacommonmineral · Mohs 2.5-3white, gray, yellow
Tsaregorodtseviteraremineral · Mohs 6colorless, white, gray- No imageTsikourasiteraremineral · Mohs 4silver-white, gray
Tube Agatecommonmineral · Mohs 6.5-7white, gray, blue
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
Uchucchacuaiteraremineral · Mohs 3.5gray- No imageUngavaiteraremineral · Mohs 3-3.5gray, white
Uraniniteuncommonmineral · Mohs 5-6black, brownish-black, gray
Uraniumraremineral · Mohs 6silvery-white, gray
Urvantseviteraremineral · Mohs 2.5-3white, gray
Valentiniteuncommonmineral · Mohs 2.5-3white, 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 Fossilcommonfossil · Mohs 3-6brown, tan, black
Vinogradoviteraremineral · Mohs 2-3white, colorless, gray
Vishneviteraremineral · Mohs 5-6white, gray, yellow
Volcanic Ashcommonigneousgray, brown, black
Volkovskiteraremineral · Mohs 2-2.5colorless, 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
Werneritecommonmineral · Mohs 5.5-6white, gray, yellow
Westervelditeraremineral · Mohs 5-6white, silver-white, gray
Whetstonecommonsedimentary · Mohs 5-7gray, white, brown
Whitlockiteraremineral · Mohs 5colorless, white, gray
Willyamiteraremineral · Mohs 5-5.5white, gray
Witheriteuncommonmineral · Mohs 3-3.5white, gray, yellow
Witticheniteraremineral · Mohs 2.5gray, steel-gray, tin-white
Wollastonitecommonmineral · Mohs 4.5-5white, gray, cream
Wood Opalcommonfossil · Mohs 5.5-6.5brown, tan, gray
Xenotimeuncommonmineral · Mohs 4-5yellowish-brown, reddish-brown, yellow- No imageXifengiteraremineral · Mohs 5white, gray
Xonotliteuncommonmineral · Mohs 6-6.5white, gray, colorless- No imageYaroslaviteraremineral · Mohs 4colorless, white, gray
Ye'elimiteraremineral · Mohs 5-6colorless, white, gray
Yooperlitecommonmineral · Mohs 6gray, gray-brown- No imageYttriaite-(Y)raremineral · Mohs 4-5brown, yellow, gray
Zavaritskiteraremineral · Mohs 2-3yellow, white, gray
Zincraremineral · Mohs 2.5silver-white, gray, blue-gray
Zincobriartiteraremineral · Mohs 4gray, pinkish-gray
Zincospiroffiteraremineral · Mohs 3.5-4gray- No imageZinkositeraremineral · Mohs 3.5white, colorless, gray
Zoisitecommonmineral · Mohs 6-7gray, green, pink
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