Grafik ilustrasi ini menunjukan peringkat kekerasa untuk 149 varietas batu Permata alam. ini adalah skala kekerasan yang paling lengkap dan akurat untuk batu permata yang tersedia secara online, dan mencakup banyak varietas batu langka.
Dalam gemology, kekerasa batu permata diukur pada skala yang dikenal sebagai skala mohs, yang memberikan mineral nilai antara 1 (sftest) dan 10 (hardest). Skala inidirancang oleh ahli mineral Jerman, Fredrik mohs, pada tahun 1822. yang mendefinisikan kekerasa dalam hal tahan gores, di mana meneral hardest akan menggores softest, namun tidak sebaliknya.
Gems dengan rating kekerasa 1-2 dianggap softest sedangkan di kisaran 3-5 adalah medium hardest/keras. Gems lebih dari 6 dianggap hardest/keras dan dengan dmikian cocok untuk perhiasan.
| Diamond | 10 | |
| Ruby | 9 | |
| Star Ruby | 9 | |
| Sapphire | 9 | |
| Star Sapphire | 9 | |
| Alexandrite | 8.5 | |
| Alexandrite Cat's Eye | 8.5 | |
| Chrysoberyl | 8.5 | |
| Chrysoberyl Cat's Eye | 8.5 | |
| Vanadium Chrysoberyl | 8.5 | |
| Taaffeite | 8-8.5 | |
| Spinel | 8 | |
| Topaz | 8 | |
| Imperial Topaz | 8 | |
| Pezzotaite | 8 | |
| Emerald | 7.5-8 | |
| Enstatite | 7.5-8 | |
| Aquamarine | 7.5-8 | |
| Morganite | 7.5-8 | |
| Goshenite Beryl | 7.5-8 | |
| Golden Beryl | 7.5-8 | |
| Painite | 7.5-8 | |
| Phenakite | 7.5-8 | |
| Red Beryl (Bixbite) | 7.5-8 | |
| Andalusite | 7.5 | |
| Euclase | 7.5 | |
| Hambergite | 7.5 | |
| Dumortierite | 7-8.5 | |
| Almandine Garnet | 7-7.5 | |
| Danburite | 7-7.5 | |
| Iolite | 7-7.5 | |
| Pyrope Garnet | 7-7.5 | |
| Spessartite Garnet | 7-7.5 | |
| Rhodolite Garnet | 7-7.5 | |
| Color-Change Garnet | 7-7.5 | |
| Chrome Tourmaline | 7-7.5 | |
| Malaia Garnet | 7-7.5 | |
| Paraiba Tourmaline | 7-7.5 | |
| Rubellite Tourmaline | 7-7.5 | |
| Tourmaline | 7-7.5 | |
| Uvarovite Garnet | 7-7.5 | |
| Amethyst | 7 | |
| Aventurine | 7 | |
| Ametrine | 7 | |
| Citrine | 7 | |
| Gem Silica | 7 | |
| Kornerupine | 7 | |
| Rock Crystal | 7 | |
| Rose Quartz | 7 | |
| Smoky Quartz | 7 | |
| Jeremejevite | 6.5-7.5 | |
| Sillimanite | 6.5-7.5 | |
| Zircon | 6.5-7.5 | |
| Agate | 6.5-7 | |
| Axinite | 6.5-7 | |
| Bloodstone | 6.5-7 | |
| Carnelian | 6.5-7 | |
| Chalcedony | 6.5-7 | |
| Chrome Chalcedony | 6.5-7 | |
| Chrysopase | 6.5-7 | |
| Demantoid Garnet | 6.5-7 | |
| Diaspore | 6.5-7 | |
| Grossular Garnet | 6.5-7 | |
| Hessonite Garnet | 6.5-7 | |
| Hiddenite | 6.5-7 | |
| Jadeite Jade | 6.5-7 | |
| Jasper | 6.5-7 | |
| Mali Garnet | 6.5-7 | |
| Kunzite | 6.5-7 | |
| Leuco Garnet | 6.5-7 | |
| Onyx | 6.5-7 | |
| Peridot | 6.5-7 | |
| Serendibite | 6.5-7 | |
| Sinhalite | 6.5-7 | |
| Spodumene | 6.5-7 | |
| Tanzanite | 6.5-7 | |
| Tsavorite Garnet | 6.5-7 | |
| Idocrase (Vesuvianite) | 6.5 | |
| Cassiterite | 6-7 | |
| Epidote | 6-7 | |
| Maw-Sit-Sit | 6-7 | |
| Unakite | 6-7 | |
| Amazonite | 6-6.5 | |
| Andesine | 6-6.5 | |
| Benitoite | 6-6.5 | |
| Labradorite | 6-6.5 | |
| Moonstone | 6-6.5 | |
| Nephrite Jade | 6-6.5 | |
| Orthoclase | 6-6.5 | |
| Petalite | 6-6.5 | |
| Prehnite | 6-6.5 | |
| Scheelite | 6-6.5 | |
| Sugilite | 6-6.5 | |
| Sunstone | 6-6.5 | |
| Zoisite | 6-6.5 | |
| Amblygonite | 6 | |
| Clinohumite | 6 | |
| Hematite | 5.5-6.5 | |
| Mexican Fire Opal | 5.5-6.5 | |
| Opal | 5.5-6.5 | |
| Rhodonite | 5.5-6.5 | |
| Actinolite | 5.5-6 | |
| Azurite | 5.5-6 | |
| Hackmanite | 5.5-6 | |
| Hauyne | 5.5-6 | |
| Scapolite | 5.5-6 | |
| Sodalite | 5.5-6 | |
| Moldavite | 5.5 | |
| Diopside | 5-6 | |
| Chrome Diopside | 5-6 | |
| Lapis Lazuli | 5-6 | |
| Poudretteite | 5-6 | |
| Turquoise | 5-6 | |
| Brazilianite | 5.5 | |
| Datolite | 5-5.5 | |
| Eudialyte | 5-5.5 | |
| Obsidian | 5-5.5 | |
| Sphene (Titanite) | 5-5.5 | |
| Apatite | 5 | |
| Cat's Eye Apatite | 5 | |
| Dioptase | 5 | |
| Hemimorphite | 5 | |
| Smithsonite | 5 | |
| Charoite | 4.5-5 | |
| Gaspeite | 4.5-5 | |
| Larimar | 4.5-5 | |
| Kyanite | 4-7 | |
| Bastnasite | 4-5 | |
| Carletonite | 4-4.5 | |
| Ammolite (Korite) | 4 | |
| Fluorite | 4 | |
| Rhodochrosite | 4 | |
| Aragonite | 3.5-4 | |
| Azurite | 3.5-4 | |
| Cuprite | 3.5-4 | |
| Malachite | 3.5-4 | |
| Sphalerite | 3.5-4 | |
| Coral | 3-4 | |
| Celestine | 3-3.5 | |
| Cerussite | 3-3.5 | |
| Howlite | 3-3.5 | |
| Calcite | 3 | |
| Pearl | 2.5-4.5 | |
| Jet | 2.5-4 | |
| Lepidolite | 2.5-3 | |
| Chrysocolla | 2-4 | |
| Amber | 2-2.5 | |
| Cinnabar | 2-2.5 | |
| Ulexite | 2-2.5 |