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 1201–1320 of 2721 rocks (page 11 of 23).
Kamarizaiteraremineral · Mohs 2-3yellow, yellowish-green
Kambaldaiteraremineral · Mohs 3.5yellow, pale yellow- No imageKamchatkiteraremineral · Mohs 3yellow, yellowish-orange
- No imageKameneviteraremineral · Mohs 3-4colorless, white, yellowish
- No imageKamitugaiteraremineral · Mohs 2.5-3yellow, brownish-yellow
Kammereriteraremineral · Mohs 2-2.5violet, purple, magenta
Kamotoite-(Y)raremineral · Mohs 2-3yellow, bright yellow
Kampfiteraremineral · Mohs 3colorless, white, pale yellow
Kamphaugite-(Y)raremineral · Mohs 3white, colorless, pale yellow
Kaolincommonmineral · Mohs 2-2.5white, grayish, yellowish
Kaolinitecommonmineral · Mohs 2-2.5white, grayish, yellowish
Kapellasiteraremineral · Mohs 3bright green, pale green
Kapundaiteraremineral · Mohs 3yellow, yellow-orange- No imageKapustiniteraremineral · Mohs 3.5yellow, yellowish-orange, brown
- No imageKarasugiteraremineral · Mohs 3-4colorless, white
Karnasurtite-(Ce)raremineral · Mohs 3yellowish-brown, brown, light brown- No imageKarpenkoiteraremineral · Mohs 2-3dark green, blackish green
- No imageKarpinskiteraremineral · Mohs 3.5-4white, colorless, pale yellow
- No imageKasatkiniteraremineral · Mohs 3.5-4colorless, white, yellowish
Kashiniteraremineral · Mohs 3.5-4white, pale gray
Kastningiteraremineral · Mohs 3.5pink, violet, reddish-pink
Katerinopoulositeraremineral · Mohs 2-3white, colorless- No imageKatiarsiteraremineral · Mohs 2.5white, colorless
- No imageKayrobertsoniteraremineral · Mohs 3.5yellow, pale yellow
- No imageKazanskyiteraremineral · Mohs 3yellow, brown
Keckiteraremineral · Mohs 3-4yellowish-brown, brown
Kegeliteraremineral · Mohs 2.5white, gray, colorless- No imageKeiliteraremineral · Mohs 3.5-4black, brown
- No imageKeithconniteraremineral · Mohs 3.5-4bronze, white
Kellyiteraremineral · Mohs 2.5yellow, yellow-green
Kelyaniteraremineral · Mohs 3.5yellow, yellow-orange
Kempiteraremineral · Mohs 3.5emerald-green, olive-green- No imageKenngottiteraremineral · Mohs 2-3iron-black, dark gray
Kenoargentotetrahedrite-(Fe)raremineral · Mohs 3-4iron-black, steel-gray- No imageKenotobermoriteraremineral · Mohs 2.5-3white, colorless
Kenyaiteraremineral · Mohs 2-3white, colorless
Kerniteuncommonmineral · Mohs 2.5-3colorless, white, gray
Kësteriteraremineral · Mohs 3.5brown, brownish-black, black
Kettneriteraremineral · Mohs 3yellow, yellowish-white, colorless
Keutschiteraremineral · Mohs 3-4gray, black
Keyiteraremineral · Mohs 3-4green, yellow-green- No imageKeystoneiteraremineral · Mohs 2-3blue, greenish blue
Khademiteraremineral · Mohs 2.5-3yellow, yellowish-white, colorless
Khanneshiteraremineral · Mohs 3-4white, colorless, pale yellow- No imageKharaelakhiteraremineral · Mohs 3.5-4gray, brownish-gray
Khiniteraremineral · Mohs 3yellow, greenish-yellow
Kiddcreekiteraremineral · Mohs 3.5pinkish-bronze, copper-red
Kidwelliteraremineral · Mohs 3.5yellow, yellow-green, brownish-yellow- No imageKieftiteraremineral · Mohs 3.5silver-white, gray
Kieseritecommonmineral · Mohs 3.5white, colorless, yellowish- No imageKihlmanite-(Ce)raremineral · Mohs 3.5-4yellowish-brown, brown, yellow
Kimberliteuncommonigneous · Mohs 3-5dark gray, bluish gray, greenish gray
Kimrobinsoniteraremineral · Mohs 2.5colorless, white
Kimuraite-(Y)raremineral · Mohs 3.5pink, white, colorless- No imageKingsmountiteraremineral · Mohs 3-4white, colorless, pale yellow
- No imageKingstoniteraremineral · Mohs 3.5white, cream
- No imageKinichiliteraremineral · Mohs 3yellow, yellowish-orange
Kinoshitaliteraremineral · Mohs 2.5-3yellow, brown, orange
Kintoreiteraremineral · Mohs 3.5-4yellow, brownish yellow, olive green
Kirkiiteraremineral · Mohs 3lead-gray, black- No imageKitagohaiteraremineral · Mohs 3.5-4white, silver-white
Kitkaiteraremineral · Mohs 3.5white, gray- No imageKittatinnyiteraremineral · Mohs 3yellow, yellow-brown
- No imageKlajiteraremineral · Mohs 2-3yellow, yellow-green
- No imageKlaprothiteraremineral · Mohs 2.5steel-gray, blackish-gray
Klebelsbergiteraremineral · Mohs 2-2.5yellow, yellowish-green, colorless
Kleemaniteraremineral · Mohs 3.5white, colorless, pale yellow
Kleiniteraremineral · Mohs 3.5yellow, pale yellow, orange-yellow
Klockmanniteraremineral · Mohs 2-3slate-gray, bluish-gray
Klyuchevskiteraremineral · Mohs 2-2.5green, yellow-green- No imageKnasibfiteraremineral · Mohs 3colorless, white
Kobelliteraremineral · Mohs 2.5-3lead-gray, black
Kobokoboiteraremineral · Mohs 3white, colorless
Kobyasheviteraremineral · Mohs 2-3blue, pale blue- No imageKochiteraremineral · Mohs 3.5-4colorless, white
Koechliniteraremineral · Mohs 3yellow, greenish-yellow, pale yellow
Kogarkoiteraremineral · Mohs 3.5colorless, white, pale yellow- No imageKojoneniteraremineral · Mohs 3.5-4pinkish-white
- No imageKokchetaviteraremineral · Mohs 2.5-3colorless, white, pale yellow
- No imageKokinositeraremineral · Mohs 2-3orange, yellow
Kolbeckiteraremineral · Mohs 3.5-4apple-green, blue-green, yellowish-green
Kolitschiteraremineral · Mohs 2-3yellow, yellowish-orange
Kolleriteraremineral · Mohs 2-3yellow, pale yellow
Kolovratiteraremineral · Mohs 2-3yellow, yellowish-green- No imageKolskyiteraremineral · Mohs 3-4brown, yellowish-brown
Kolweziteraremineral · Mohs 3.5-4green, brownish-green, pinkish
Kolymiteraremineral · Mohs 3.5silvery white, gray
Koninckiteraremineral · Mohs 3.5yellow, yellowish-white, colorless- No imageKononoviteraremineral · Mohs 3.5yellow, brownish-yellow
Koritnigiteraremineral · Mohs 2-3pink, pale red, colorless- No imageKorneliteraremineral · Mohs 2.5violet, lavender, pinkish-white
- No imageKoryakiteraremineral · Mohs 3-4white, colorless
Korzhinskiteraremineral · Mohs 3.5white, colorless
Kosnariteraremineral · Mohs 3.5colorless, white, yellow
Kotulskiteraremineral · Mohs 2.5white, gray, pinkish-white
Koutekiteraremineral · Mohs 3.5white, silver-white, pinkish-white
Kovdorskiteraremineral · Mohs 3.5pale blue, colorless, white
Kraissliteraremineral · Mohs 3-4yellow, brown, orange-brown- No imageKrasheninnikoviteraremineral · Mohs 2.5colorless, white
Krasnoviteraremineral · Mohs 3-4white, colorless- No imageKrausiteraremineral · Mohs 2.5yellow, brownish-yellow
- No imageKrauskopfiteraremineral · Mohs 3.5colorless, white
Krenneriteraremineral · Mohs 2.5silver-white, pale brass-yellow- No imageKrettnichiteraremineral · Mohs 3.5yellow, brownish-yellow
Kribergiteraremineral · Mohs 3.5white, colorless
Krieseliteraremineral · Mohs 3.5yellow, yellowish-white
Kristianseniteraremineral · Mohs 3.5colorless, white
Kröhnkiteuncommonmineral · Mohs 2.5-3blue, blue-green- No imageKrotiteraremineral · Mohs 3.5colorless
- No imageKroupaiteraremineral · Mohs 3yellow, orange-yellow
Krupkaiteraremineral · Mohs 3.5lead-gray, steel-gray
Kruťaiteraremineral · Mohs 3.5gray, silver-white
Kryzhanovskiteraremineral · Mohs 3.5brownish-red, orange-brown, reddish-brown- No imageKuannersuite-(Ce)raremineral · Mohs 3.5-4yellow, brown, red-brown
- No imageKudryavtsevaiteraremineral · Mohs 3.5yellow, brownish-yellow
Kukisvumiteraremineral · Mohs 3-4white, colorless, pale yellow
Kuksiteraremineral · Mohs 3-4yellow, yellowish-green, colorless- No imageKuliginiteraremineral · Mohs 3.5yellow, brownish-yellow
Kumtyubeiteraremineral · Mohs 3.5white, colorless- No imageKupčíkiteraremineral · Mohs 3-3.5black
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