Mohs hardness 3 rocks & minerals
Mohs hardness 3 is the calcite mark — easily scratched by a copper coin. Many carbonates and softer sulfides cluster here.
Showing 1681–1800 of 2721 rocks (page 15 of 23).
Nastrophiteraremineral · Mohs 3white, colorless
Nataliakulikiteraremineral · Mohs 3.5colorless
Native Antimonyraremineral · Mohs 3-3.5tin-white, silver-white, light gray
Native Arsenicuncommonmineral · Mohs 3.5tin-white, light gray, black
Native Bismuthuncommonmineral · Mohs 2-2.5silver-white, pinkish-white, iridescent
Native Cadmiumraremineral · Mohs 2-2.5white, gray
Native Coppercommonmineral · Mohs 2.5-3copper-red, reddish-brown, tarnished-brown
Native Goldcommonmineral · Mohs 2.5-3gold, brass-yellow
Native Silveruncommonmineral · Mohs 2.5-3silver-white, tarnish to gray or black
Native Sulfurcommonmineral · Mohs 1.5-2.5yellow, yellow-orange, yellow-green- No imageNative Sulphurcommonmineral · Mohs 1.5-2.5yellow, yellow-orange, yellow-brown
Native Telluriumraremineral · Mohs 2-2.5tin-white, silver-white- No imageNative Tungstenraremineral · Mohs 3.5gray, white
- No imageNative Vanadiumraremineral · Mohs 3silver-gray, white
Natroaluniteuncommonmineral · Mohs 3.5-4white, yellowish, colorless- No imageNatroaphthitaliteraremineral · Mohs 3white, colorless, yellowish
- No imageNatroboltwooditeraremineral · Mohs 3-4yellow, pale yellow
Natrojarositecommonmineral · Mohs 2.5-3.5yellow, yellow-brown, golden-yellow
Natrolemoyniteraremineral · Mohs 3-4white, colorless, pale yellow- No imageNatromarkeyiteraremineral · Mohs 2.5-3colorless, white, yellowish
Natropharmacoalumiteraremineral · Mohs 2.5white, colorless, pale yellow
Natropharmacosideriteraremineral · Mohs 2.5green, yellow-green, olive-green
Natrophosphateraremineral · Mohs 3.5colorless, white, pale yellow
Natrosiliteraremineral · Mohs 3colorless, white, pale yellow- No imageNatrouranospiniteraremineral · Mohs 2-3yellow, yellowish-green
- No imageNatrowalentaiteraremineral · Mohs 2-3yellow, yellowish-orange
- No imageNatrozippeiteraremineral · Mohs 2-3yellow, orange-yellow
Naujakasiteraremineral · Mohs 2.5white, silvery white, colorless- No imageNaumanniteraremineral · Mohs 2.5lead-gray, iron-black
Nealiteraremineral · Mohs 2.5orange, yellow
Nefedoviteraremineral · Mohs 3.5colorless, white, pale yellow- No imageNegevitecommonmineral · Mohs 2.5-3.5green, brown, yellow
Neighboriteraremineral · Mohs 3.5colorless, white, tan
Nekrasoviteraremineral · Mohs 3.5pinkish-brown, gray
Neotociteuncommonmineral · Mohs 3-4black, dark brown, reddish-brown
Népouiteuncommonmineral · Mohs 2.5green, yellowish-green, apple-green
Nesquehoniteuncommonmineral · Mohs 2.5white, colorless, grayish-white
Neustädteliteraremineral · Mohs 3-4yellow, yellow-brown, brown
Nevadaiteraremineral · Mohs 2-3green, blue-green, yellow-green
Newberyiteraremineral · Mohs 2.5white, colorless, grayish-white
Neyiteraremineral · Mohs 2.5-3lead-gray, black
Nickelalumiteraremineral · Mohs 2.5-3blue, blue-green- No imageNickelbischofiteraremineral · Mohs 2.5green
Nickelblöditeraremineral · Mohs 2.5-3yellow, pale yellow
Nickelboussingaultiteraremineral · Mohs 2.5blue-green, greenish-blue, pale green
Nickelpicromeriteraremineral · Mohs 2.5green, yellow-green
Nickeltalmessiteraremineral · Mohs 3.5green, yellowish-green
Nickenichiteraremineral · Mohs 3yellow, yellowish-orange- No imageNicksoboleviteraremineral · Mohs 3-4deep violet, dark blue
Nielsbohriteraremineral · Mohs 3-4yellow, pale yellow- No imageNielseniteraremineral · Mohs 3.5white, silver-white
Nifontoviteraremineral · Mohs 3.5colorless, white- No imageNiksergieviteraremineral · Mohs 3.5yellow, brown, white
Nimiteraremineral · Mohs 2.5-3dark green, yellowish green
Ningyoiteraremineral · Mohs 3brown, yellowish-brown- No imageNiningeriteraremineral · Mohs 3.5-4dark brown, black, gray
Niobokupletskiteraremineral · Mohs 3-4brown, dark brown, reddish-brown
Niobophylliteraremineral · Mohs 3bronze-brown, golden-brown, dark brown- No imageNipalarsiteraremineral · Mohs 3-4white, colorless
Nissoniteraremineral · Mohs 2.5blue-green, pale green
Nitrobariteraremineral · Mohs 3colorless, white
Niveolaniteraremineral · Mohs 3white, colorless
Nobleiteraremineral · Mohs 3colorless, white- No imageNollmotziteraremineral · Mohs 2.5yellow, yellow-green
Nordgauiteraremineral · Mohs 3-4colorless, white
Nordstranditeraremineral · Mohs 3white, colorless
Nordströmiteraremineral · Mohs 2.5lead-gray, steel-gray- No imageNorilskiteraremineral · Mohs 3-4silver-white, pale yellow
Norrishiteraremineral · Mohs 2.5-3red, brown
Norsethiteraremineral · Mohs 3.5white, colorless, gray
Northupiteuncommonmineral · Mohs 3.5-4white, gray, yellow
Nováčekiteraremineral · Mohs 2.5yellow, greenish-yellow, lemon-yellow
Novákiteraremineral · Mohs 3-3.5silver-white, gray- No imageNovodnepriteraremineral · Mohs 3.5white, yellowish-white
Nowackiiteraremineral · Mohs 3-3.5black
Nuffielditeraremineral · Mohs 3.5lead-gray, tin-white
Nukundamiteraremineral · Mohs 3.5dark brown, bronze
Nullaginiteraremineral · Mohs 3bright green, apple green- No imageNuwaiteraremineral · Mohs 3.5white, gray
Nyerereiteraremineral · Mohs 3.5colorless, white, pale yellow- No imageNyholmiteraremineral · Mohs 3-4white, colorless
- No imageO'Danieliteraremineral · Mohs 3light blue, bluish white
- No imageOberthüriteraremineral · Mohs 3.5-4black, brown
Obradovicite-KCuraremineral · Mohs 2-3yellow, greenish-yellow- No imageObradovicite-NaCuraremineral · Mohs 2-3yellow, greenish-yellow
- No imageObradovicite-NaNararemineral · Mohs 2-3yellow, orange-yellow
- No imageOdiniteraremineral · Mohs 2-3green, greenish-blue
- No imageOeniteraremineral · Mohs 3.5white, pale yellow
Ogdensburgiteraremineral · Mohs 3-4yellow, yellowish-orange, brownish-yellow- No imageOgnititeraremineral · Mohs 3.5-4bronze, brownish-yellow
Ohmiliteraremineral · Mohs 3.5colorless, white, pale yellow
Ojuelaiteraremineral · Mohs 3yellow, orange-yellow- No imageOlekminskiteraremineral · Mohs 3.5white, colorless
Oliveniteuncommonmineral · Mohs 3olive-green, yellow-green, brown- No imageOlkhonskiteraremineral · Mohs 2-3yellow, brownish-yellow
Olmsteaditeraremineral · Mohs 3-4dark brown, black
Olsacheriteraremineral · Mohs 3-4colorless, white, pale yellow
Olshanskyiteraremineral · Mohs 3white, colorless- No imageOmariniiteraremineral · Mohs 3.5black, dark gray
- No imageOneilliteraremineral · Mohs 3-4brown, yellow-brown
Oolitecommonsedimentary · Mohs 3white, gray, tan
Oolitic Limestonecommonsedimentary · Mohs 3white, tan, gray
Oosterboschiteraremineral · Mohs 3-3.5white, pale yellow- No imageOppenheimeriteraremineral · Mohs 2-3yellow, pale yellow
Optical Calcitecommonmineral · Mohs 3colorless, white
Orceliteraremineral · Mohs 3.5-4pale bronze, yellowish-white- No imageOrickiteraremineral · Mohs 2.5dark brown, black, gray
Orientiteraremineral · Mohs 3.5-4brown, dark brown- No imageOrloviteraremineral · Mohs 2.5-3colorless, pale yellow, white
Orthocerascommonfossil · Mohs 3-4black, brown, gray- No imageOrthominasragriteraremineral · Mohs 2.5blue, light blue
- No imageOrthowalpurgiteraremineral · Mohs 3-4yellow, orange-yellow
Osarizawaiteraremineral · Mohs 3.5yellow, greenish-yellow- No imageOscarkempffiteraremineral · Mohs 2.5-3lead-gray, black
Otaviteraremineral · Mohs 3.5white, gray, yellowish
Otjisumeiteraremineral · Mohs 3yellow, pale yellow- No imageOttoiteraremineral · Mohs 2-3yellow, pale yellow
Otwayiteraremineral · Mohs 2.5bright green, pale green
Oulankaiteraremineral · Mohs 3.5-4brass-yellow, grayish-yellow
Ourayiteraremineral · Mohs 2.5lead-gray, steel-gray
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