Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Mineral Hardness - Mohs Scale

The Mohs qualitative ordinal scale characterizes the scratch resistance of various minerals.

The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals or materials through the ability of a harder materials to scratch softer materials.

Mohs Scale - Typical Materials
Mohs HardnessTypical Material
1 Talc
2 Gypsum, Rock salt
2.5 Fingernail, pure gold, silver, aluminum
3 Calcspar (calcite), copper coin (penny)
4 Fluorspar (fluorite)
4.5 Platinum, iron
5 Apatite
6 Felspar, orthoclase, titanium, spectrolite
6.5 Steelfile, iron pyrite, glass, vitreous pure silica, streak plate
7 Quarts, amethyst, citrine, agate
7.5 Garnet
8 Topaz, hardened steel, beryl, emerald, aquamarine
8.94 Rock crystal quartz
9 African crystal corundum, ruby, sapphire
9.03 Fused alumina
9.06 Fused alumina (3.14% TiO2)
9.09 Tungsten carbid (13% cobalt)
9.15 Black silicon carbide
9.32 Boron carbide
9.5 Carborundum
9.95 Diamond, Congo clear white
9.96 Diamond, Congo yellow
9.99 Diamond, South American brown ballas
10 Diamond, South American brown bort

Minerals and Mohs Hardnes

Minerals - Mohs Hardnes
MineralMohs Hardnes
Acanthite 2
Acmite 6 - 6.5
Actinolite 5.5
Alabandite 3.4 - 4.4
Alamandine 7 - 8
Albite 7
Allanite 5.5
Allemontite 3 - 4
Allophane 3
Altaite 2.5
Alunite 3.5 - 4
Amblygonite 5.5 - 6
Analcime 5
Anatese 5.5 - 6
Andalusite 6.5 - 7
Andesine 7
Andradite 6.5 - 7
Anglesite 2.5 - 3
Ankerite 3.5 - 4
Annebergite 2
Anorthite 6
Anorthoclase 6
Anthophyllite 5 - 6
Anthydrite
Antimony 3 - 3.5
Antlerite 3
Apatite 5
Apophyllite 4 - 4.5
Aragonite 3.5 - 4
Arfvedsonite 5.5 - 6
Argenite 2 - 2.5
Arsenic 3.5
Arsenopyrite 5
Atacamite 3 - 3.5
Augite 5 - 6.5
Aurichalcite 2
Autonite 2  - 2.5
Awaruite 5
Axinite 6.5 - 7
Azurite 3.5 - 4
Barite 3 - 3.5
Bastnaesite 4 - 5
Beidellite 1 - 2
Beryl 7.5 -8
Biotite 2.5 - 3
Bismite 4 - 5
Bismuth 2 - 2.5
Boehmite 3
Boracite 7
Borax 2 - 2.5
Boulangerite 2.5
Brannerite 4 - 5
Braunite 6 - 6.5
Bravoite 6.5
Brochantite 3.5 - 4
Bromargyrite 1.5 - 2
Bronzite 5.5 - 6
Brookite 5.5 - 6
Brucite 2.5 - 3
Bytownite 7
Calcite 3
Calomel 1.5 - 2
Calvarite 2.5
Cancrinite 2.5
Carnallite 2.5
Carnotite 2
Cassiterite 6 - 7
Celestite 3 - 3.5
Celsian 6 - 6.5
Cerargyrite 1 - 1.5
Cerussite 3 - 3.5
Cervanite 4 - 5
Chabazite 4
Chalcanthite 2.5
Chalcocite 2.5 - 3
Chalcopyrite 3.5
Chlorite 1 - 2
Chloritoid 6.5
Chondrodite 6 - 6.5
Chromite 5.5
Chrysoberyl 8.5
Chrysocolla 2.5 - 3.5
Cinnibar 2 - 2.5
Clinochlore 2 - 2.5
Clinoclase 2.5 - 3
Clinoenstatite 5 - 6
Clinoferrosilite 5 - 6
Clinohumite 6
Clinzoite 7
Cobaltite 5.5
Colemanite 4.5
Columbite 6
Copper 2.5 - 3
Cordierite 7
Corundum 9
Coveillite 1.5 - 2
Cristobalite 6.5
Crocoite 2.5 - 3
Cryolite 2.5 - 3
Cubanite 3.5
Cummingtonite 5 - 6
Cuprite 3.5 - 4
Danburite 7
Datolite 5.5
Diamond 10
Diaspore 6.5 - 7
Dickite 1.5 - 2
Digenite 2.5 - 3
Diopside 6
Dioptase 5
Dolmite 3.5 - 4
Dumortierite 8.5
Edenite 6
Embolite 1 - 1.5
Enargite 3
Enstatite 5.5
Erythrite 1.5 - 2
Espomite 2 - 2.5
Euclase 7.5
Euxenite 6.5
Fayalite 6.5
Feberite 4.5
Fergusonite 5.5 - 6.5
Ferrimolybdite 2.5 - 3
Ferrosilite 5 - 6
Fluorite 4
Forsterite 6 - 7
Franklinite 5.5 - 6
Gadolinite 6.5 - 7
Gahnite 8
Galaxite 7.5
Galena 2.5
Garnierite 3 - 4
Gaylussite 2.5
Geocronite 2.5 - 3
Gersdorffite 5.5
Gibbsite 2.5 - 3
Glauberite 2.5 - 3
Glauconite 2
Glaucophane 6 - 6.5
Gmelinite 4.5
Goethite 5 - 5.5
Gold 2.5 - 3
Goslarite 2 - 2.5
Graphite 1.5 - 2
Greenocktite 3.5 - 4
Grossularite 6.5 - 7.5
Gypsum 2
Halite 2.5
Halloysite 2
Harmotome 4 - 5
Hastingsite 6
Hausmanite 5.5
Hauynite 5 - 6
Hectorite 1 - 2
Hedenbergite 5 - 6
Helvite 6 - 6.5
Hemimorphite 5
Hercynite 7.5
Hessite 1.5 - 2
Heulandite 3 - 3.5
Hornblende 5 - 6
Huebnerite 4.5
Humite 6 - 6.5
Hyalophane 6 - 6.5
Hydrozincite 2 - 2.5
Hypersthene 5.5 - 6
Ice 2.5
Iddingsite 3
Idocrase 6.5
Illemenite 5 - 5.5
Illite 1 - 2
Ilvaite 5.5 - 6
Iodobromite 1 - 1.5
Iodyrite 1.5 - 2
Irdosmine 6 - 7
Iridium 6 - 7
Jacobsite 5.5 - 6
Jadeite 6.5
Jamesonite 2.5
Jarosite 2.5 - 3.5
Kaliophilite 5.5 - 6
Kaolinite 1.5 - 2
Kernite 2.5 - 3
Krennerite 2.5
Kyanite 4 - 7
Langbeinite 3.5 - 4
Larsenite 3
Laumonite 3.5 - 4
Lawsonite 7.5
Lazulite 5 - 6
Lazurite 5.5
Lechatelierite 6.5
Lepidolite 2.5 - 3
Leucite 6
Liebthenite 4
Limonite 5 - 5.5
Linarite 2.5
Linneaeite 4.5 - 5.5
Lithiophilite 4 - 5
Loellingite 5
Magnesite 4
Magnetite 5.5 - 6
Malachite 3.5 - 4
Manganite 4
Manganosite 5 - 6
Marcasite 6 - 6.5
Margarite 4
Marialite 5.5 - 6
Meionite 5 - 6
Melanterite 2
Melilite 5 - 5.5
Menaghinite 2.5
Miargyrite 2 - 2.5
Microcline 6
Microlite 5 - 5.5
Millerite 3 - 3.5
Mimetite 3.5 - 4
Minium 2.5 - 3
Molybdenite 1
Monazite 5 - 5.5
Monticellite 5
Montmotillonite 1.5 - 2
Mullite 6 - 7
Musscovite 2 - 2.5
Nacrite 1
Nagyagite 1.5 - 2
Natrolite 5.5 - 6
Nephheline 6
Niccolite 5.5
Nitre 2
Nontronite 1.5 - 2
Norbergite 6 - 6.5
Noselite 5.5 - 6
Oligoclase 7
Opal 5.5 - 6
Orpiment 1.5 - 2
Orthoclase 6
Ottrelite 6 - 7
Palladium 4.5 - 5
Paragonite 2.5
Pargasite 6
Pearceite 2.5 - 3
Pectolite 5
Pentlandite 3.5 - 4
Perovskite 5.5
Petalite 6 - 6.5
Petzite 2.5
Phenaktite 7.5 - 8
Phillipsite 4.5 - 5
Phlogopite 2 - 2.5
Phosgenite 2.5 - 3
Phosphuranylite 2.5
Pigeonite 6
Plagionite 2.5
Platinum 4 - 4.5
Polucite 6.5
Polybasite 2.5 - 3
Polycrase 5 - 6
Polyhalite 2.5 - 3.5
Potash alum 2 - 2.5
Powellite 3.5
Prehnite 6 - 6.5
Proustite 2 - 2.5
Pyrargyrite 2.5
Pyrite 6.6
Pyrochlore 5 - 5.5
Pyrolusite 6 - 6.5
Pyromorphite 3.5 - 4
Pyrope 7.5
Pyrophyllite 1.5 - 2
Pyrrhotite 3.5 - 4
Quartz 7
Rammelsbergite 5.5
Realgar 1.5 - 2
Rhodochrosite 3
Rhodonite 6
Riebeckite 4
Roscoelite 2.5
Rutile 6 - 6.5
Samarskite 5 - 6
Sanadine 6
Saponite 1 - 1.5
Scapolite 6
Scheelite 4 - 5
Scolecite 5 - 5.5
Scorodite 3.5 - 4
Scorzalite 5.5 - 6
Semseyite 2.5
Sepiolite 2
Serpentine 2.5 - 3
Siderite 3.5
Siegenite 5 - 5.5
Sillimanite 7
Silver 2.5 - 3
Sklodowskite 2 - 3
Skutterudite 5.5 - 6
Smithsonite 4.5
Soda nitre 1.5 - 2
Sodalite 6
Sperrylite 6 - 7
Spessartine 6.5 - 7.5
Sphalerite 3.5 - 4
Sphene 5 - 5.5
Spinel group 8
Spodumene 6.5 - 7
Stannite 3.5 - 4
Staurolite 7 - 7.5
Stephanite 2 - 2.5
Sternbergite 1 - 1.5
Stibnite 2
Stilbite 3.5 - 4
Stolzite 2.5 - 3
Stromeyerite 2.5 - 3
Strontianite 3.5
Sulphur 1.5 - 2.5
Sylvanite 1.5 - 2
Sylvite 2.5
Talc 1
Tantalite 6 - 6.5
Tennantite 3.5 - 4
Tenorite 3.5 - 4
Tephroite 6.5
Tetrahedrite 3.4 - 4
Thenardite 2.5
Thomsonite 5 - 5.5
Thorianite 6
Thorite 5
Tin 2
Topaz 8
Torbernite 2 - 2.5
Tourmaline 7
Tremolite 5 - 6
Tridymite 6.5 - 7
Triphylite 4 - 5
Troilite 3.5 - 4
Trona 2.5
Tungstite 2.5
Turquoise 5 - 6
Tyuyamunite 1.5 - 2
Ulexite 2.5
Uraninite 5 - 6
Uranophane 2.5
Uvarovite 6.5 - 7
Vanadinite 3.5 - 4
Variscite 4 - 5
Vermiculite 1.5 - 2
Violarite 4.5 - 5.5
Vivianite 1.5 - 2
Wavellite 3.5 - 4
Willemite 5.5
Witherite 3 - 3.5
Wolframite 4.5
Wollastonite 5
Wulfenite 3
Wurtzite 3.5 - 4
Xenotime 4 - 5
Zincite 4 - 5
Zinkenite 3 - 3.5
Zircon 7.5
Zoisite 6.5

Related Topics

  • Material Properties

    Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.

Related Documents

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

We use a third-party to provide monetization technologies for our site. You can review their privacy and cookie policy here.

You can change your privacy settings by clicking the following button: .

Citation

This page can be cited as

  • The Engineering ToolBox (2015). Mineral Hardness - Mohs Scale. [online] Available at: https://www.engineeringtoolbox.com/moh-mineral-hardness-d_1912.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































4.10.13

.