Mohs hardness 6 rocks & minerals
Mohs hardness 6 is orthoclase feldspar — the boundary where a steel knife stops working as a scratch tool. Glass usually gives way.
Showing 1201–1320 of 1497 rocks (page 11 of 13).
Rinmaniteraremineral · Mohs 6yellow, brown- No imageRoalditeraremineral · Mohs 5.5white, gray
Rockcastle Conglomeratecommonsedimentary · Mohs 6-7gray, white, tan
Romanèchitecommonmineral · Mohs 5-6black, gray- No imageRondorfiteraremineral · Mohs 6colorless, white
- No imageRose Agatecommonmineral · Mohs 6.5-7pink, rose, white
Rosenbuschiteraremineral · Mohs 5-6orange, yellow, brownish-yellow- No imageRossovskyiteraremineral · Mohs 6-6.5black, brownish black
- No imageRoumaiteraremineral · Mohs 5-6black, brown
Royston Turquoiseuncommonmineral · Mohs 5-6blue, green, brown- No imageRuarsiteraremineral · Mohs 5-6silver-white, gray
Rubiclineraremineral · Mohs 6red, pink- No imageRuthenarseniteraremineral · Mohs 5-6white, silver-white
Rutheniridosmineraremineral · Mohs 6-7silver-white, light steel-gray
Rutilecommonmineral · Mohs 6-6.5reddish-brown, red, black- No imageSacrofaniteraremineral · Mohs 5-6white, yellow, colorless
Sadanagaiteraremineral · Mohs 5-6black, dark brown, dark green
Sagenite Agatecommonmineral · Mohs 6.5-7clear, white, yellow
Samarskite-(Y)raremineral · Mohs 5-6black, brownish-black
Samarskite-(Yb)raremineral · Mohs 5-6black, brownish-black
Sandstonecommonsedimentary · Mohs 6-7tan, brown, yellow- No imageSandstone With Calcite Veinscommonsedimentary · Mohs 3-7tan, brown, red
Sanidinecommonmineral · Mohs 6colorless, white, gray
Santaclaraiteraremineral · Mohs 5-6orange, reddish-orange
Sarcoliteraremineral · Mohs 6pink, red, white
Sardcommonmineral · Mohs 6.5-7brownish-red, reddish-brown, orange-brown- No imageSavannah River Agatecommonfossil · Mohs 6.5-7red, orange, yellow
- No imageScandiobabingtoniteraremineral · Mohs 5.5-6black, greenish black
Scapolitecommonmineral · Mohs 5.5-6colorless, white, gray
Schistcommonmetamorphic · Mohs 3-6silver, gray, black
Schneebergiteraremineral · Mohs 5-5.5yellow, yellowish-brown, brown
Schreibersiteraremineral · Mohs 6.5-7brass-yellow, silver-white, tin-white
Schreyeriteraremineral · Mohs 6-7black, brownish-black
Schülleriteraremineral · Mohs 6.5-7.5yellow, brown, reddish-brown
Scolecitecommonmineral · Mohs 5-5.5white, colorless, pink
Scoriacommonigneous · Mohs 5-6black, dark gray, reddish brown
Scorzaliteraremineral · Mohs 5.5-6blue, dark blue, azure
Seinäjokiteraremineral · Mohs 5-6tin-white, silver-white
Senaiteraremineral · Mohs 6black
Serendibiteraremineral · Mohs 6.5-7blue, blue-green, black
Serpentinecommonmineral · Mohs 2.5-5.5green, yellow, brown
Serpentinitecommonmetamorphic · Mohs 2.5-5.5green, yellow-green, black
Sharyginiteraremineral · Mohs 5-6black, brown
Shcherbakoviteraremineral · Mohs 5-6reddish-brown, brown, yellow-brown
Sheen Obsidiancommonmineral · Mohs 5-6black, gold, silver- No imageShibkoviteraremineral · Mohs 5-6colorless, white
- No imageShuangfengiteraremineral · Mohs 5.5silver-white, gray
Shuiskite-(Cr)raremineral · Mohs 6dark green, blackish green- No imageShuiskite-(Mg)raremineral · Mohs 6dark green, olive green, blackish green
- No imageShulamititeraremineral · Mohs 5-6black, brown
Siegeniteuncommonmineral · Mohs 4.5-5.5steel gray, silver white, light gray
Silesiaiteraremineral · Mohs 6.5-7yellow, brown, greenish- No imageSiliceous Oolitecommonsedimentary · Mohs 6.5-7white, gray, tan
- No imageSilicified Agatecommonfossil · Mohs 6.5-7multicolored, white, gray
Silicified Algaecommonfossil · Mohs 6.5-7tan, brown, gray
Silicified Coralcommonfossil · Mohs 6.5-7white, gray, brown- No imageSilicified Cycad Wooduncommonfossil · Mohs 6.5-7brown, tan, white
- No imageSilicified Dinosaur Boneuncommonfossil · Mohs 6.5-7red, brown, black
- No imageSilicified Fernscommonfossil · Mohs 6.5-7brown, black, gray
Silicified Fossilscommonfossil · Mohs 6.5-7brown, red, yellow- No imageSilicified Lignitecommonfossil · Mohs 6.5-7brown, black, gray
- No imageSilicified Mastodon Tusksrarefossil · Mohs 6.5-7white, cream, tan
- No imageSilicified Oolitecommonfossil · Mohs 6.5-7white, gray, brown
- No imageSilicified Palm Woodcommonfossil · Mohs 6.5-7brown, tan, black
- No imageSilicified Pine Conesuncommonfossil · Mohs 6.5-7brown, tan, gray
- No imageSilicified Woodcommonfossil · Mohs 6.5-7brown, red, yellow
Sillimanitecommonmineral · Mohs 6.5-7.5white, colorless, gray- No imageSilvialiteraremineral · Mohs 5-6white, colorless, gray
Simpsoniteraremineral · Mohs 6-7yellow, brown, colorless
Sinhaliteraremineral · Mohs 6.5-7yellow, brown, greenish-brown
Sinoiteraremineral · Mohs 5.5white, colorless, gray
Siudaiteraremineral · Mohs 5-6yellow, yellowish-brown
Skarncommonmetamorphic · Mohs 5-7green, brown, black
Skutteruditeuncommonmineral · Mohs 5.5-6tin-white, silver-white, gray
Slawsoniteraremineral · Mohs 6colorless, white, gray
Sleeping Beauty Turquoiseraregemstone · Mohs 5-6sky blue, robins egg blue
Smaragditeuncommonmineral · Mohs 5-6emerald green, grass green- No imageSnakeskin Agatecommonmineral · Mohs 6.5-7white, gray, tan
Snowflake Obsidiancommonmineral · Mohs 5-5.5black, white
Sodalitecommonmineral · Mohs 5.5-6blue, white, gray
Sogdianiteraremineral · Mohs 6violet, purple, blue- No imageSonoliteraremineral · Mohs 6yellow, orange, brownish-red
Sørenseniteraremineral · Mohs 5.5colorless, white, pink
Souzaliteraremineral · Mohs 6green, blue-green
Specularitecommonmineral · Mohs 5.5-6.5steel-gray, iron-black, silvery-gray
Sperryliteraremineral · Mohs 6-7tin-white, silver-white, lead-gray
Spessartineuncommonmineral · Mohs 6.5-7.5orange, red-orange, red
Spessartine Garnetuncommongemstone · Mohs 6.5-7.5orange, red-orange, yellow-orange
Sphaerobertranditeraremineral · Mohs 6yellow, colorless, white
Spheneuncommongemstone · Mohs 5-5.5yellow, green, brown- No imageSpherulitic Chertcommonmineral · Mohs 6.5-7white, gray, tan
Spodumeneuncommonmineral · Mohs 6.5-7colorless, white, gray
Sponge Fossilcommonfossil · Mohs 2.5-7gray, white, tan- No imageSrebrodolskiteraremineral · Mohs 5-6dark red, brown, black
- No imageStangersiteraremineral · Mohs 6colorless, white
Staurolite Schistcommonmetamorphic · Mohs 3.5-7dark brown, gray, brownish-black
Stibiconitecommonmineral · Mohs 5-5.5yellow, white, colorless
Stibiocolumbiteraremineral · Mohs 5-5.5yellow, brown, greenish-yellow
Stibiotantaliteraremineral · Mohs 5-5.5yellow, brown, tan
Stishoviteraremineral · Mohs 6.5-7colorless, white, gray- No imageStöffleriteraremineral · Mohs 6colorless, white
Stokesiteraremineral · Mohs 6colorless, white- No imageStony Meteoriterarefossil · Mohs 5-7gray, brown, black
- No imageStony-Iron Meteoriterarefossil · Mohs 5-6brown, metallic, yellow
- No imageStripped Agatecommonmineral · Mohs 6.5-7white, gray, blue
Stronalsiteraremineral · Mohs 6white, colorless
Strontiochevkiniteraremineral · Mohs 5-6black, brownish black- No imageStrontiohurlbutiteraremineral · Mohs 6colorless, white, gray
Suaniteraremineral · Mohs 5.5white, colorless, gray
Suessiteraremineral · Mohs 5-6silver-white, pale yellow
Sueviteuncommonigneous · Mohs 5-6gray, brown, greenish
Sugiliteraremineral · Mohs 6-6.5purple, violet, pinkish-purple- No imageSulfhydrylbystriteraremineral · Mohs 5.5-6yellow, golden-yellow
Sunstoneuncommongemstone · Mohs 6-6.5orange, red, gold
Sursassiteraremineral · Mohs 6.5-7reddish-brown, brown- No imageSweetwater Agatecommonmineral · Mohs 6.5-7clear, white, gray
Syenitecommonigneous · Mohs 6gray, pink, white
Tabulate Coralcommonfossil · Mohs 5-7tan, brown, gray
Tadzhikite-(Ce)raremineral · Mohs 5-6yellow, brown, greenish-brown
Taeniteraremineral · Mohs 5-5.5silver-white, gray
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