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Rocks & Minerals with a Mohs Hardness of 7

On the Mohs scale, hardness 7 is defined by quartz. The 73 rocks and minerals below fall at or within the 7 to 8 band, so they scratch anything softer on this page and are scratched by anything harder.

Field test: It scratches glass and a steel knife and cannot be scratched by a steel file.

Hardness is a range for many species, so an entry listed here may also appear at the neighboring level.

Also browse:Mohs 1Mohs 2Mohs 3Mohs 4Mohs 5Mohs 6Mohs 8Mohs 9Mohs 10

All hardness 7 minerals (73)

Amethyst specimen: purple and violet crystalAmethystMohs 7 · White streakEmerald specimen: green and bluish green gemstoneEmeraldMohs 7.5 · White streakRose Quartz specimen: pink and rose mineralRose QuartzMohs 7 · White streakClear Quartz specimen: colorless and white mineralClear QuartzMohs 7 · White streakTiger's Eye specimen: golden brown and yellow mineralTiger's EyeMohs 7 · White streakAquamarine specimen: light blue and blue-green gemstoneAquamarineMohs 7.5 · White streakGarnet specimen: red and orange gemstoneGarnetMohs 7 · White streakCitrine specimen: yellow and orange crystalCitrineMohs 7 · White streakAgate specimen: blue and brown mineralAgateMohs 7 · White streakJasper specimen: red and yellow mineralJasperMohs 7 · White streakCarnelian specimen: orange and red-orange mineralCarnelianMohs 7 · White streakKunzite specimen: pink and lilac gemstoneKunziteMohs 7 · White streakSmoky Quartz specimen: brown and gray crystalSmoky QuartzMohs 7 · White streakFire Agate specimen: brown and orange mineralFire AgateMohs 7 · White streakZircon specimen: colorless and blue gemstoneZirconMohs 7.5 · White streakBlue Lace Agate specimen: pale blue and white mineralBlue Lace AgateMohs 7 · White streakIolite specimen: violet-blue and blue gemstoneIoliteMohs 7 · White streakBloodstone specimen: dark green with red spots mineralBloodstoneMohs 7 · White streakDendritic Agate specimen: white and gray mineralDendritic AgateMohs 7 · White streakAura Quartz specimen: iridescent and blue materialAura QuartzMohs 7 · White to colorless streakDalmatian Jasper specimen: cream and white mineralDalmatian JasperMohs 7 · White streakAlmandine specimen: deep red and reddish brown mineralAlmandineMohs 7–7.5 · White streakAmetrine specimen: purple and yellow bicolor zoning mineralAmetrineMohs 7 · White streakAmmolite specimen: gemstoneAmmoliteMohs 7 · White to light-colored streakAndalusite specimen: reddish brown and olive green mineralAndalusiteMohs 6.5–7.5 · White streakAndradite specimen: yellow-green (demantoid) and brown mineralAndraditeMohs 6.5–7 · White streakAventurine specimen: green and blue mineralAventurineMohs 6.5–7 · White streakAxinite specimen: clove-brown and violet-brown mineralAxiniteMohs 6.5–7 · White streakBanded Iron Formation specimen: red and reddish brown sedimentary rockBanded Iron FormationMohs 5–7 · Reddish brown (from hematite-rich layers) streakBeryl specimen: green (emerald) and blue (aquamarine) mineralBerylMohs 7.5–8 · White streakCassiterite specimen: brown and black mineralCassiteriteMohs 6–7 · White to grayish brown streakChalcedony specimen: blue-gray and white mineralChalcedonyMohs 6.5–7 · White streakChert specimen: gray and white sedimentary rockChertMohs 6.5–7 · Waxy to dullChiastolite specimen: gray and brown mineralChiastoliteMohs 6.5–7.5 · White streakChrysoprase specimen: apple-green and green (sometimes with darker spots) mineralChrysopraseMohs 6.5–7 · White streakConglomerate specimen: variegated and gray sedimentary rockConglomerateMohs 3–7 · Variable; dull matrix to vitreous clastsCordierite specimen: blue and violet-blue mineralCordieriteMohs 7–7.5 · White streakDacite specimen: gray and light gray igneous rockDaciteMohs 6–7 · Dull to vitreousDanburite specimen: colorless and pale yellow mineralDanburiteMohs 7–7.5 · White streakDiaspore specimen: colorless and white mineralDiasporeMohs 6.5–7 · White streakDiorite specimen: salt-and-pepper gray and dark gray igneous rockDioriteMohs 6–7 · Vitreous to dull (granular)Dumortierite specimen: blue and violet-blue mineralDumortieriteMohs 7–8.5 · White streakDunite specimen: olive green and yellowish green igneous rockDuniteMohs 6.5–7 · Vitreous (olivine grains)Eclogite specimen: green (omphacite) and red (garnet) metamorphic rockEclogiteMohs 6–7.5 · Vitreous (garnet and omphacite grains)Elbaite specimen: pink and green mineralElbaiteMohs 7–7.5 · White streakEpidote specimen: pistachio green and yellowish green mineralEpidoteMohs 6–7 · White to grayish streakFlint specimen: black and dark gray sedimentary rockFlintMohs 6.5–7 · Waxy to dull, glassy on fresh fractureForsterite specimen: pale yellow-green and olive green mineralForsteriteMohs 6.5–7 · White streakGneiss specimen: gray and pink metamorphic rockGneissMohs 6–7 · Vitreous to glimmering (mica-rich bands)Goshenite specimen: colorless and white mineralGosheniteMohs 7.5–8 · White streakGranodiorite specimen: light gray and gray igneous rockGranodioriteMohs 6–7 · Vitreous to dull (mixed mineral grains)Grossular specimen: colorless and green mineralGrossularMohs 6.5–7.5 · White streakHessonite specimen: orange-brown and cinnamon mineralHessoniteMohs 6.5–7 · White streakMigmatite specimen: pink and black and light and dark layered metamorphic rockMigmatiteMohs 5–7 · Vitreous to dull (banded)Milky Quartz specimen: milky white and white crystalMilky QuartzMohs 7 · White streakMorganite specimen: pink and peach gemstoneMorganiteMohs 7.75 · White streakOlivine specimen: olive green and yellowish green mineralOlivineMohs 6.5–7 · White streakOnyx specimen: mineralOnyxMohs 6.5–7 · White streakPegmatite specimen: pink and white igneous rockPegmatiteMohs 6–7 · Vitreous (large crystal faces)Peridotite specimen: green and dark green igneous rockPeridotiteMohs 5.5–7 · Vitreous (olivine and pyroxene grains)Porphyry specimen: purple and red igneous rockPorphyryMohs 5–7 · Dull to vitreousPrasiolite specimen: green and pale green gemstonePrasioliteMohs 7 · White streakPyrope specimen: red and deep red gemstonePyropeMohs 7.25 · White streakQuartz specimen: colorless and white crystalQuartzMohs 7 · White streakQuartzite specimen: white and gray metamorphic rockQuartziteMohs 7 · Vitreous to sugary/granularRhyolite specimen: pink and gray igneous rockRhyoliteMohs 5.5–7 · Dull to vitreous (glassy groundmass)Schist specimen: silver-gray and golden (mica-rich) metamorphic rockSchistMohs 2.5–7 · Vitreous to silky/glittery (mica-rich)Schorl specimen: black and bluish black mineralSchorlMohs 7 · White to grayish streakSillimanite specimen: white and gray mineralSillimaniteMohs 7 · White streakSpessartine specimen: orange and red mineralSpessartineMohs 7 · White streakStaurolite specimen: reddish brown and brown mineralStauroliteMohs 7.25 · White to grayish streakTourmaline specimen: black and green mineralTourmalineMohs 7–7.5 · White (colorless) streakTungsten specimen: dark gray and steel gray metalTungstenMohs 7.5 · Gray streak

Frequently asked questions

What common minerals have a hardness of 7?

Amethyst, Emerald, Rose Quartz, Clear Quartz, and Tiger's Eye all sit at Mohs 7.

What scratches a mineral with hardness 7?

Anything harder on the Mohs scale: topaz (hardness 8) and above. It scratches glass and a steel knife and cannot be scratched by a steel file.

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