| A LIST OF GEMSTONES FOUND IN TANZANIA | ||||||||
| NAME | HARDNESS | NAME | HARDNESS | NAME | HARDNESS | |||
| Diamond | 10 | Sillimanite | 7 | Thomsonite | 5 - 6 | |||
| Ruby | 9 | Cassitenite | 6 - 7 | Apatite | 5 | |||
| Sapphire | 9 | Epidote | 6 - 7 | Algelite | 5 | |||
| Alexandrite | 8 | Hiddenite | 6 - 7 | Dioptase | 5 | |||
| Chrysoberly | 8 | Kunzite | 6 - 7 | Glass | 5 | |||
| Rhodozite | 8 | Amazonite | 6 - 7 | Hemimorphite | 8 | |||
| Spinel | 8 | Aventurine | 6 - 7 | Smithsonite | 5 | |||
| Taaffette | 8 | Feldspar | 6 - 7 | Wardite | 5 | |||
| Topaz | 8 | Benitoite | 6 - 7 | Kyanite | 5 | |||
| Yag | 8 | Labradorte | 6 - 7 | Apophylite | 4 - 5 | |||
| Aquamarine | 7 - 8 | Moonstone | 6 - 7 | Scheelite | 4 - 5 | |||
| Berly | 7 - 8 | Nephrite | 6 - 7 | Zincite | 4 - 5 | |||
| Emerald | 7 - 8 | Orthodase | 6 - 7 | Colemanite | 4 - 5 | |||
| Gabnite | 7 - 8 | Petalite | 6 - 7 | Kumakovite | 4 - 5 | |||
| Painite | 7 - 8 | Pyrity | 6 - 7 | Purpurite | 4 - 5 | |||
| Phenacite | 7 - 8 | Rutile | 6 - 7 | Variscite | 4 - 5 | |||
| Almandine | 7 | Strontium | 6 - 7 | Fluorite | 4 | |||
| Andalusite | 7 | Titanate | 6 - 7 | Barytocalcite | 4 | |||
| Euclase | 7 | Amblygonite | 6 - 7 | Magnesite | 4 | |||
| Hambergite | 7 | Bytownite | 6 | Rhodochrosite | 4 | |||
| Uvarovite | 7 | Sanidine | 6 | Dolomite | 3 - 4 | |||
| Andradite | 7 | Thulite | 6 | Chalybite | 3 - 4 | |||
| Cardierite | 7 | Tugtapite | 6 | Aragonite | 3 - 4 | |||
| Danburite | 7 | Herratite | 6.0 | Azurite | 3 - 4 | |||
| Garnet | 7 | Opal | 6.0 | Cuprite | 3 - 4 | |||
| Lolito | 7 | Rhosonite | 6.0 | Chalcopyrite | 3 - 4 | |||
| Rhodolite | 7 | Tremolite | 6.0 | Malachite | 3 - 4 | |||
| Staurolite | 7 | Actinolite | 6.0 | Sphalerite | 3 - 4 | |||
| Tourmaline | 7 | Anatase | 6.0 | Cerussite | 3 | |||
| Amethyst | 7 | Beryllonite | 6.0 | Howlite | 3 | |||
| Citrine | 7 | Elaeolite | 6.0 | Witherite | 3 | |||
| Dumortierite | 7 | Hauyrite | 6.0 | Coral | 3 - 4 | |||
| Prasiolite | 7 | Peridase | 6.0 | Pearl | 3 - 4 | |||
| Rock Crystal | 7 | Psilonelane | 6.0 | Anhydrite | 3 | |||
| Smoky Quartz | 7 | Rodalite | 6.0 | Celestine | 3 | |||
| Rose Quartz | 7 | Brazilianite | 5 | Barite | 3 | |||
| Tiger's Eye | 7 | Chromite | 5 | Calcite | 3 | |||
| Zircon | 6 - 7 | Enstatite | 5.0 | Wulfenite | 2 - 3 | |||
| Agate | 6 - 7 | Leucite | 5.0 | Jet | 2 - 4 | |||
| Axinite | 6 - 7 | Moldavite | 5.0 | Crocoite | 2 - 3 | |||
| Chalcedony | 6 - 7 | Natrolite | 5.0 | Gamierite | 2 - 3 | |||
| Chloromelanite | 6 - 7 | Willemite | 5.0 | Phosgenite | 2 - 3 | |||
| Chrysoprase | 6 - 7 | Scapolite | 5 - 6 | Gaylussite | 2 | |||
| Demantoid | 6 - 7 | Cancrinite | 5 - 6 | Proustite | 2 | |||
| Fossilized Wood | 6 - 7 | Diopside | 5 - 6 | Pseudophite | 2 | |||
| Heliotrope | 6 - 7 | Hypersthene | 5 - 6 | Seropentine | 2 | |||
| Jadeite | 6 - 7 | Iimenite | 5 - 6 | Chrysocolla | 2 - 5 | |||
| Jasper | 6 - 7 | Lapis Lazuli | 5 - 6 | Ivory | 2 - 4 | |||
| Komerupine | 6 - 7 | Lazullite | 5 - 6 | Amber | 2 - 3 | |||
| Peridot | 6 - 7 | Tantalite | 5 - 6 | Meerschaum | 2 | |||
| Sard | 6 - 7 | Turquose | 5 - 6 | Alabaster | 2 | |||
| Tanzanite | 6 - 7 | Datolite | 5 - 6 | Ulexite | 2 | |||
| Zoisite | 6 - 7 | Datolite | 5 - 6 | Vivianite | 1 - 3 | |||
| Idocrase | 6 | Obsidian | 5 | Stichtite | 1 - 2 | |||
| Saussurite | 6 | Ophene | 5 | Sulphur | 1 - 2 | |||
| Seab Gems Ltd - 1996 copyrights | ||||||||