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 1–120 of 1910 rocks around Mohs 4.
Abenakiite-(Ce)raremineral · Mohs 4yellow, brown, yellow-brown
Abuiteraremineral · Mohs 3.5colorless, white
Achávaliteraremineral · Mohs 3.5-4bronze, reddish-brown
Acuminiteraremineral · Mohs 3.5colorless, white
Adamiteuncommonmineral · Mohs 3.5yellow, green, colorless
Adamsite-(Y)raremineral · Mohs 3-4white, colorless, pale yellow
Aerugiteraremineral · Mohs 3.5green, blue-green
Agardite-(Ce)raremineral · Mohs 3-4yellow, yellowish-green, green
Agardite-(La)raremineral · Mohs 3-4yellow, yellow-green, light green
Agardite-(Nd)raremineral · Mohs 3-4yellow, yellow-green, green
Agardite-(Y)raremineral · Mohs 3-4yellow, greenish-yellow, pale green
Aiolositeraremineral · Mohs 3.5yellow, brownish-yellow
Ajoiteraremineral · Mohs 3.5blue, greenish-blue
Akaganeiteuncommonmineral · Mohs 3-4reddish-brown, brown, yellowish-brown
Akdalaiteraremineral · Mohs 4white, colorless
Akrochorditeraremineral · Mohs 3.5reddish-brown, brown, yellowish-brown
Aktashiteraremineral · Mohs 3-3.5gray, black
Alabanditeuncommonmineral · Mohs 3.5-4black, iron-black, brownish-black
Alamositeraremineral · Mohs 4.5-5white, colorless
Alarsiteraremineral · Mohs 3-4white, colorless- No imageAlbanditeraremineral · Mohs 3.5-4black, brownish-black
- No imageAleksandroviteraremineral · Mohs 4-5colorless, white
- No imageAlexkhomyakoviteraremineral · Mohs 3-4yellow, yellowish-orange
- No imageAlfredstelzneriteraremineral · Mohs 3.5colorless, white
Algodoniteraremineral · Mohs 3.5-4silver-white, steel-gray
Allactiteraremineral · Mohs 3-4dark red, reddish brown, brown
Allanpringiteraremineral · Mohs 3.5yellowish-brown, brown- No imageAlloclasiteraremineral · Mohs 3.5white, steel-gray
Alluauditeuncommonmineral · Mohs 3.5yellow, brown, green
Alstoniteraremineral · Mohs 4-4.5colorless, white, gray
Alteriteraremineral · Mohs 3.5yellow, yellowish-brown, brown
Althausiteraremineral · Mohs 3.5colorless, white, gray
Althupiteraremineral · Mohs 3-4yellow, yellow-green- No imageAluminomagnesiohulsiteraremineral · Mohs 3.5-4black, brown
Alumohydrocalciteraremineral · Mohs 4white, colorless, pale yellow- No imageAlumoklyuchevskiteraremineral · Mohs 3-4dark green, black
Alunitecommonmineral · Mohs 3.5-4white, gray, pink- No imageAmamooriteraremineral · Mohs 3.5-4white, yellowish-white, colorless
Ameghiniteraremineral · Mohs 3.5colorless, white
Amiciteraremineral · Mohs 4.5white, colorless, gray
Aminoffiteraremineral · Mohs 4colorless, white, gray
Ammoliterarefossil · Mohs 3.5-4.5iridescent red, green, gold
Ammonioaluniteraremineral · Mohs 3.5-4white, colorless
Ammoniojarositeuncommonmineral · Mohs 2.5-3.5yellow, yellow-brown, brown
Ammonitescommonfossil · Mohs 3-4brown, gray, black
Amstalliteraremineral · Mohs 4white, colorless
Anapaiteuncommonmineral · Mohs 3.5pale green, yellowish-green, white
Ancylite-(Ce)uncommonmineral · Mohs 4-4.5yellow, brown, reddish-brown- No imageAncylite-(La)raremineral · Mohs 4-4.5yellow, brown, colorless
- No imageAndymcdonalditeraremineral · Mohs 4-4.5yellow, brown
Andyrobertsiteraremineral · Mohs 3-4white, pale yellow- No imageAngelelliteraremineral · Mohs 3.5red, brownish-red
Angelitecommonmineral · Mohs 3.5blue, grayish-blue, white
Anhydritecommonmineral · Mohs 3.5colorless, white, gray
Aniliteraremineral · Mohs 3.5gray, dark gray, black
Ankeritecommonmineral · Mohs 3.5-4white, yellow, brown- No imageAnorthoroseliteraremineral · Mohs 3.5rose-red, pink, magenta
Antigoritecommonmineral · Mohs 2.5-3.5green, yellow-green, brown
Antimonyraremineral · Mohs 3-3.5tin-white, silver-gray
Antleriteuncommonmineral · Mohs 3.5emerald green, dark green, blackish green- No imageAnyuiiteraremineral · Mohs 3.5white, silver-white
Aphthitaliteuncommonmineral · Mohs 3-3.5white, colorless, gray
Apophyllitecommonmineral · Mohs 4.5-5white, colorless, green
Aragonitecommonmineral · Mohs 3.5-4white, colorless, yellow- No imageArakiiteraremineral · Mohs 4orange, brownish-orange
- No imageArangasiteraremineral · Mohs 3.5yellow, brown, white
- No imageAravaiteraremineral · Mohs 3.5colorless, white
Argentojarositeuncommonmineral · Mohs 2.5-3.5yellow, yellowish-brown
Argentopentlanditeraremineral · Mohs 3.5bronze-yellow, yellowish-white
Argentopyriteraremineral · Mohs 3.5silver-white, grayish-black- No imageArgentotennantite-(Zn)raremineral · Mohs 3-4steel-gray, iron-black
Argentotetrahedrite-(Fe)raremineral · Mohs 3-4steel-gray, iron-black
Arhbariteraremineral · Mohs 3-4bright green, emerald green
Arisite-(Ce)raremineral · Mohs 4yellow, brown- No imageArisite-(La)raremineral · Mohs 3-4yellow, pale yellow
Aristarainiteraremineral · Mohs 3.5white, colorless
Armangiteraremineral · Mohs 3.5-4black, brownish-black- No imageArmbrusteriteraremineral · Mohs 3-4yellow, brown, greenish-brown
- No imageArmellinoite-(Ce)raremineral · Mohs 3-4yellow, pale yellow
Armstrongiteraremineral · Mohs 3.5colorless, white, pale pink
Arrojadite-(BaNa)raremineral · Mohs 4-5dark green, brownish-green, olive-green
Arrojadite-(KFe)raremineral · Mohs 4-5dark green, brownish green, olive green- No imageArrojadite-(KNa)raremineral · Mohs 4-5green, brown, yellowish-green
- No imageArrojadite-(PbFe)raremineral · Mohs 4-5green, brown, yellow-brown
- No imageArrojadite-(SrFe)raremineral · Mohs 4-5dark green, brownish green, brown
- No imageArsenbrackebuschiteraremineral · Mohs 4.5yellow, brownish-yellow, brown
Arsendescloiziteraremineral · Mohs 4.5yellow, greenish yellow, brownish yellow
Arsenicuncommonmineral · Mohs 3.5tin-white, gray, black
Arseniopleiteraremineral · Mohs 3.5dark brown, reddish-brown, black
Arseniosideriteuncommonmineral · Mohs 4-4.5yellow, brown, reddish-brown
Arsenogoyaziteraremineral · Mohs 4-5white, colorless, pale yellow
Arsenohauchecorniteraremineral · Mohs 4brass-yellow, bronze- No imageArsenohopeiteraremineral · Mohs 3.5colorless, white
Arsenopalladiniteraremineral · Mohs 3.5white, light yellow, gray- No imageArsenquatrandoriteraremineral · Mohs 3.5lead-gray, steel-gray
Arsentsumebiteraremineral · Mohs 3.5green, yellow-green, emerald-green
Arsenudinaiteraremineral · Mohs 3.5-4silver-white, pale gray
Arsiccioiteraremineral · Mohs 3.5-4black
Arthuriteraremineral · Mohs 3-4apple-green, yellow-green, emerald-green
Ashburtoniteraremineral · Mohs 3-4colorless, white, pale blue
Ashcroftine-(Y)raremineral · Mohs 3.5pink, rose-red, colorless
Atacamiteuncommonmineral · Mohs 3-3.5dark green, bright green, emerald green
Atelestiteraremineral · Mohs 4.5-5yellow, yellow-green, sulfur-yellow
Atencioiteraremineral · Mohs 4yellow, brown, greenish-yellow
Atheneiteraremineral · Mohs 3.5white, pale yellow- No imageAtlasoviteraremineral · Mohs 3-4black, dark brown
Atokiteraremineral · Mohs 3.5-4silver-white, gray
Attakoliteraremineral · Mohs 3.5-4yellow, brown, reddish-brown
Augeliteraremineral · Mohs 4.5-5colorless, white, yellowish
Auriacusiteraremineral · Mohs 3.5yellow, brownish-yellow
Auricuprideraremineral · Mohs 3-3.5yellow, gold
Aurihydrargyrumiteraremineral · Mohs 3.5gold, yellow
Austiniteuncommonmineral · Mohs 4colorless, white, yellow- No imageAxeliteraremineral · Mohs 4.5-5white, colorless, pink
Azuritecommonmineral · Mohs 3.5-4azure blue, deep blue- No imageBabefphiteraremineral · Mohs 3.5colorless, white, pale yellow
Baculitecommonfossil · Mohs 3-4brown, gray, beige- No imageBairditeraremineral · Mohs 3.5yellow, pale yellow
Bakhchisaraitseviteraremineral · Mohs 3.5colorless, white, pale yellow
Balangeroiteraremineral · Mohs 3.5brown, reddish-brown
Identify your specimen
Open RockHoundR to compare hardness, streak, and locality against your find.
