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 2041–2160 of 2721 rocks (page 18 of 23).
Ransomiteraremineral · Mohs 2.5blue, pale blue
Ranunculiteraremineral · Mohs 2-3yellow, bright yellow
Raspiteraremineral · Mohs 2.5-3yellow, yellowish-brown, brown
Rasvumiteraremineral · Mohs 3black, dark brown
Rathiteraremineral · Mohs 3lead-gray, black
Rathite-IVraremineral · Mohs 3lead-gray, black
Rauchiteraremineral · Mohs 2-3yellow, yellow-green- No imageRaygrantiteraremineral · Mohs 3white, colorless
Rayiteraremineral · Mohs 3dark gray, lead-gray, black
Rectoriteuncommonmineral · Mohs 2-3white, gray, yellowish
Red Marblecommonmetamorphic · Mohs 3-4red, white, pink- No imageRed Ochercommonmineral · Mohs 1-5red, reddish-brown
- No imageRed Pearlrarefossil · Mohs 2.5-4red, pink, brownish-red
Reddingiteraremineral · Mohs 3-3.5pink, brownish-pink, yellowish-white- No imageRedgilliteraremineral · Mohs 3green, yellow-green
Redonditeraremineral · Mohs 3.5-4.5yellow, green, white- No imageReederite-(Y)raremineral · Mohs 3.5yellow, yellow-brown, brown
Rémondite-(La)raremineral · Mohs 3.5-4yellow, brown, colorless- No imageRenarditeraremineral · Mohs 2-3yellow, lemon-yellow
Reppiaiteraremineral · Mohs 3dark red, brownish-red
Reyeriteraremineral · Mohs 3-4white, colorless, pale yellow
Reynoldsiteraremineral · Mohs 3yellow, yellow-orange, brown
Rhabdophane-(Ce)uncommonmineral · Mohs 3.5white, yellow, pink
Rhabdophane-(La)raremineral · Mohs 3.5white, gray, yellowish- No imageRhabdophane-(Nd)raremineral · Mohs 3.5pink, white, yellow
Rhabdophane-(Y)raremineral · Mohs 3.5white, gray, yellow- No imageRhodarsenideraremineral · Mohs 3white, silver-white
Rhodesiteraremineral · Mohs 3-4white, colorless
Rhodochrositeuncommonmineral · Mohs 3.5-4pink, red, rose-red
Rhodplumsiteraremineral · Mohs 3-3.5red, pink, brownish-red- No imageRichelliteraremineral · Mohs 3.5yellow, brownish-yellow, yellow-brown
- No imageRichetiteraremineral · Mohs 3black, brownish-black
- No imageRicolitecommonmineral · Mohs 3-5green, yellow, black
Rilanditeraremineral · Mohs 3-4dark red, reddish-brown
Rimkorolgiteraremineral · Mohs 3-4colorless, white, pale pink- No imageRinneiteraremineral · Mohs 3colorless, white, pale pink
Rivadaviteraremineral · Mohs 3.5yellow, white, colorless
Riversideiteraremineral · Mohs 3white, colorless
Robertsiteraremineral · Mohs 3.5pink, pale pink, white- No imageRobinsoniteraremineral · Mohs 2.5lead-gray
- No imageRoeblingiteraremineral · Mohs 3white, colorless, pale pink
- No imageRogermitchelliteraremineral · Mohs 3.5colorless, white, pale yellow
- No imageRohaiteraremineral · Mohs 3-4white, gray
Römeriteuncommonmineral · Mohs 3yellow, brown, reddish-brown
Rongibbsiteraremineral · Mohs 3.5yellow, yellow-orange
Ronneburgiteraremineral · Mohs 3yellow, yellowish-orange
Rooseveltiteraremineral · Mohs 3.5white, colorless, pale yellow- No imageRoquesiteraremineral · Mohs 3.5-4grayish-black, dark gray
- No imageRorisiteraremineral · Mohs 3white, colorless
Roscoeliteuncommonmineral · Mohs 2.5-3green, dark green, brownish green
Rose Muscoviteuncommonmineral · Mohs 2.5-3pink, rose-red- No imageRose Rockscommonmineral · Mohs 3-3.5reddish-brown, red, tan
Roseliteraremineral · Mohs 3.5rose-red, pink, magenta
Rosenbergiteraremineral · Mohs 3white, colorless
Roshchiniteraremineral · Mohs 2.5black, dark gray
Rosiaiteraremineral · Mohs 3-4yellow, yellow-brown
Rosièresiteraremineral · Mohs 2-3yellow, yellowish-brown, white
Rossiteraremineral · Mohs 2-3yellow, orange-yellow
Rössleriteraremineral · Mohs 2-3white, colorless, pale yellow
Rouaiteraremineral · Mohs 3blue, greenish-blue
Routhieriteraremineral · Mohs 3deep red, black
Rouvilleiteraremineral · Mohs 3-3.5colorless, white, pale yellow
Roxbyiteraremineral · Mohs 2.5-3dark gray, black- No imageRoymilleriteraremineral · Mohs 3-4pink, violet-pink
Rozenitecommonmineral · Mohs 2.5white, snow-white, colorless
Rruffiteraremineral · Mohs 3.5pink, rose red
Rucklidgeiteraremineral · Mohs 2.5lead-gray, white- No imageRudashevskyiteraremineral · Mohs 3.5-4gray
- No imageRudenkoiteraremineral · Mohs 3-3.5colorless, white, pale yellow
- No imageRüdlingeriteraremineral · Mohs 3-4orange, yellowish-orange
Rugose Coralcommonfossil · Mohs 3-4white, gray, brown- No imageRuitenbergiteraremineral · Mohs 3colorless, white
- No imageRumoiiteraremineral · Mohs 3.5white, gray
Russelliteraremineral · Mohs 3.5yellow, yellowish-white, pale yellow- No imageRustenburgiteraremineral · Mohs 3.5-4white, cream white
Rutherfordineraremineral · Mohs 2.5yellow, yellowish-orange
Sabatieriteraremineral · Mohs 2-3silver-white, gray- No imageSabelliiteraremineral · Mohs 3deep green, blue-green
Sabinaiteraremineral · Mohs 3.5white, colorless, light gray
Sabugaliteraremineral · Mohs 2.5yellow, lemon-yellow- No imageSaddlebackiteraremineral · Mohs 2.5lead-gray
Sahliniteraremineral · Mohs 2.5yellow, yellowish-orange, white
Sailaufiteraremineral · Mohs 3yellow, yellow-orange- No imageSakuraiiteraremineral · Mohs 3.5-4gray, black
Saléeiteuncommonmineral · Mohs 2.5yellow, lemon-yellow, greenish-yellow
Salesiteraremineral · Mohs 3-3.5colorless, white, yellowish- No imageSalzburgiteraremineral · Mohs 2-3lead-gray, tin-white
- No imageSamaniiteraremineral · Mohs 3.5bronze, yellow
- No imageSamfowleriteraremineral · Mohs 3.5pink, colorless, white
Sampleiteraremineral · Mohs 3.5blue, greenish-blue, pale blue
Samsoniteraremineral · Mohs 3.5dark gray, black
Sand Dollar Fossilcommonfossil · Mohs 3white, tan, gray- No imageSandstone With Calcite Veinscommonsedimentary · Mohs 3-7tan, brown, red
- No imageSanguiteraremineral · Mohs 2.5red, dark red
Sanjuaniteraremineral · Mohs 3.5white
Sanromániteraremineral · Mohs 3.5white, colorless, pale yellow
Santabarbaraiteraremineral · Mohs 2.5brown, yellowish-brown, dark brown
Santafeiteraremineral · Mohs 3black, brownish-black
Santanaiteraremineral · Mohs 2.5red, reddish-orange
Santarosaiteraremineral · Mohs 3.5yellow, yellow-green- No imageSardignaiteraremineral · Mohs 3.5-4yellow, brownish-yellow
Sarmientiteraremineral · Mohs 3.5yellow, orange-yellow- No imageSarrabusiteraremineral · Mohs 3yellow, brownish yellow, colorless
Sartoriteraremineral · Mohs 3lead-gray, steel-gray
Satimoliteraremineral · Mohs 3white, colorless, pale yellow
Satterlyiteraremineral · Mohs 3.5blue, greenish-blue
Sayriteraremineral · Mohs 2-3orange, yellow-orange
Sazhinite-(Ce)raremineral · Mohs 3white, colorless, pale pink
Sazhinite-(La)raremineral · Mohs 3.5white, colorless, pale pink- No imageSbacchiiteraremineral · Mohs 3-4colorless, white
Schachneriteraremineral · Mohs 3.5-4silver-white, pale yellow
Schafarzikiteraremineral · Mohs 3-4red, brownish-red, orange-red
Schäferiteraremineral · Mohs 3.5yellow, brownish-yellow, reddish-brown- No imageSchaireriteraremineral · Mohs 3.5colorless, white, pale yellow
- No imageSchapbachiteraremineral · Mohs 2.5-3lead-gray, iron-black
Schaurteiteraremineral · Mohs 3white, colorless
Scheuchzeriteraremineral · Mohs 3.5-4red, brown
Schieffeliniteraremineral · Mohs 2.5yellow, yellowish-orange
Schistcommonmetamorphic · Mohs 3-6silver, gray, black- No imageSchlegeliteraremineral · Mohs 3.5white, colorless, yellowish-white
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