Mohs hardness 4 rocks & minerals
Mohs hardness 4 is referenced by fluorite. Minerals at this hardness scratch with a steel knife but are too hard for a coin.
Showing 1441–1560 of 1910 rocks (page 13 of 16).
Rivadaviteraremineral · Mohs 3.5yellow, white, colorless
Robertsiteraremineral · Mohs 3.5pink, pale pink, white
Rockbridgeiteuncommonmineral · Mohs 4.5dark green, brown, black
Rodalquilariteraremineral · Mohs 4emerald green, yellow-green- No imageRogermitchelliteraremineral · Mohs 3.5colorless, white, pale yellow
- No imageRohaiteraremineral · Mohs 3-4white, gray
Rongibbsiteraremineral · Mohs 3.5yellow, yellow-orange
Röntgenite-(Ce)raremineral · Mohs 4.5yellow, brown, colorless
Rooseveltiteraremineral · Mohs 3.5white, colorless, pale yellow- No imageRoquesiteraremineral · Mohs 3.5-4grayish-black, dark gray
Rosasiteuncommonmineral · Mohs 4blue, green, blue-green
Roscheriteraremineral · Mohs 4.5green, brown, yellow- No imageRose Rockscommonmineral · Mohs 3-3.5reddish-brown, red, tan
Roseliteraremineral · Mohs 3.5rose-red, pink, magenta
Rosemaryiteraremineral · Mohs 4brown, yellow-brown, red-brown
Rosiaiteraremineral · Mohs 3-4yellow, yellow-brown
Rouvilleiteraremineral · Mohs 3-3.5colorless, white, pale yellow- No imageRoymilleriteraremineral · Mohs 3-4pink, violet-pink
Rruffiteraremineral · Mohs 3.5pink, rose red- 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
Ruifrancoiteraremineral · Mohs 4yellow, yellow-brown- No imageRumoiiteraremineral · Mohs 3.5white, gray
Russelliteraremineral · Mohs 3.5yellow, yellowish-white, pale yellow- No imageRustenburgiteraremineral · Mohs 3.5-4white, cream white
Rustumiteraremineral · Mohs 4-5colorless, white, pale yellow
Rynersoniteraremineral · Mohs 4yellow, brown
Sabinaiteraremineral · Mohs 3.5white, colorless, light gray
Saffloriteuncommonmineral · Mohs 4.5-5tin-white, silver-white, gray- No imageSahamalite-(Ce)raremineral · Mohs 4colorless, white, pale yellow
Sakhaiteraremineral · Mohs 4white, colorless, yellow- No imageSakuraiiteraremineral · Mohs 3.5-4gray, black
Salesiteraremineral · Mohs 3-3.5colorless, white, yellowish- 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- No imageSandstone With Calcite Veinscommonsedimentary · Mohs 3-7tan, brown, red
Saneroiteraremineral · Mohs 4orange, reddish-orange
Sanjuaniteraremineral · Mohs 3.5white
Sanmartiniteraremineral · Mohs 4yellow, yellowish-brown
Sanromániteraremineral · Mohs 3.5white, colorless, pale yellow
Santarosaiteraremineral · Mohs 3.5yellow, yellow-green- No imageSarcopsideraremineral · Mohs 4brown, reddish-brown, violet
- No imageSardignaiteraremineral · Mohs 3.5-4yellow, brownish-yellow
Sarkiniteraremineral · Mohs 4-5yellow, orange, red
Sarmientiteraremineral · Mohs 3.5yellow, orange-yellow
Saryarkite-(Y)raremineral · Mohs 4white, colorless, yellowish
Satterlyiteraremineral · Mohs 3.5blue, greenish-blue
Sazhinite-(La)raremineral · Mohs 3.5white, colorless, pale pink
Sazykinaite-(Y)raremineral · Mohs 4-5yellow, yellowish-green, colorless- No imageSbacchiiteraremineral · Mohs 3-4colorless, white
Scawtiteraremineral · Mohs 4.5-5white, colorless, light gray
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
Schalleriteraremineral · Mohs 4-5brown, yellowish-brown, reddish-brown
Scheelitecommonmineral · Mohs 4.5-5white, yellow, brown
Scheuchzeriteraremineral · Mohs 3.5-4red, brown
Schistcommonmetamorphic · Mohs 3-6silver, gray, black- No imageSchlegeliteraremineral · Mohs 3.5white, colorless, yellowish-white
Schlossmacheriteraremineral · Mohs 3.5-4yellow, yellow-green, brownish-yellow- No imageSchlüterite-(Y)raremineral · Mohs 4-5yellow, brown
Schmiederiteraremineral · Mohs 3.5red, orange-red, dark red
Schneiderhöhniteraremineral · Mohs 3.5dark brown, black
Schoenfliesiteraremineral · Mohs 3.5yellow, brownish-yellow, pale yellow
Schooneriteraremineral · Mohs 3-4yellow, brown
Schuilingite-(Nd)raremineral · Mohs 3.5blue, turquoise-blue, azure- No imageSclariteraremineral · Mohs 3.5colorless, white
Scoroditeuncommonmineral · Mohs 3.5-4light green, pale blue, yellowish brown- No imageScorticoiteraremineral · Mohs 3.5white
Scottyiteraremineral · Mohs 3-4dark brown, black
Scrutinyiteraremineral · Mohs 4-5black, dark brown
Sea Urchin Fossilcommonfossil · Mohs 3-5white, gray, tan
Seamaniteraremineral · Mohs 4yellow, yellow-brown, brown
Searlesiteuncommonmineral · Mohs 3.5white, colorless, gray
Sederholmiteraremineral · Mohs 3-3.5bronze, pale brass-yellow
Segeleriteraremineral · Mohs 4green, yellowish-green, olive-green
Segnititeraremineral · Mohs 4yellow, yellowish-brown, brownish-orange
Seidozeriteraremineral · Mohs 4-5yellow, brown, red-brown- No imageSelivanovaiteraremineral · Mohs 3-4yellow, brown
Semenovite-(Ce)raremineral · Mohs 3-4yellow, yellow-brown, brown- No imageSenandoriteraremineral · Mohs 3-4gray, dark gray, black
Senegaliteraremineral · Mohs 3.5yellow, yellowish-green
Septarian Nodulescommonsedimentary · Mohs 3-5brown, yellow, gray
Seranditeraremineral · Mohs 4.5-5pink, orange, red
Serpentinecommonmineral · Mohs 2.5-5.5green, yellow, brown
Serpentinitecommonmetamorphic · Mohs 2.5-5.5green, yellow-green, black
Serrabrancaiteraremineral · Mohs 3.5white, colorless, pale yellow- No imageSewarditeraremineral · Mohs 3-4dark green, yellow-green
Shadluniteraremineral · Mohs 3.5-4brass-yellow, bronze
Shanditeraremineral · Mohs 3.5bronze, pale brass-yellow
Shark Teethcommonfossil · Mohs 3-5black, brown, gray
Shattuckiteuncommonmineral · Mohs 3.5blue, greenish-blue- No imageShchurovskyiteraremineral · Mohs 3.5yellow, greenish-yellow
Shenzhuangiteraremineral · Mohs 3.5-4white, pale yellow- No imageShimazakiiteraremineral · Mohs 3.5colorless, white, pale yellow
Shkatulkaliteraremineral · Mohs 4-5yellow, brown, yellowish-brown- No imageShlykoviteraremineral · Mohs 3-4white, colorless
- No imageShosanbetsuiteraremineral · Mohs 3.5-4white, colorless, yellow
Sibirskiteraremineral · Mohs 3-4white, colorless, gray
Siderazotraremineral · Mohs 3-4black, gray
Sideritecommonmineral · Mohs 3.5-4yellow, brown, gray
Sidorenkiteraremineral · Mohs 4pink, yellowish-white, colorless
Siegeniteuncommonmineral · Mohs 4.5-5.5steel gray, silver white, light gray
Sigismunditeraremineral · Mohs 4yellow-brown, brown, dark brown
Sigloiteraremineral · Mohs 3.5yellow, brownish-yellow, colorless
Silicocarnotiteraremineral · Mohs 4.5colorless, white, pale yellow
Silléniteraremineral · Mohs 3.5-4yellow, yellowish-orange, brown
Siltstonecommonsedimentary · Mohs 3-4gray, red, brown- No imageSimferiteraremineral · Mohs 4-5dark brown, brownish-red, yellow-brown
- No imageSimmonsiteraremineral · Mohs 3.5colorless, white, pale yellow
Sinkankasiteraremineral · Mohs 3.5colorless, white, pale yellow
Sinneriteraremineral · Mohs 3.5gray, black
Sitinakiteraremineral · Mohs 3-4colorless, white- No imageSkaergaarditeraremineral · Mohs 3.5white
Slatecommonmetamorphic · Mohs 2.5-4gray, black, green
Identify your specimen
Open RockHoundR to compare hardness, streak, and locality against your find.
