|
Gem Variety |
Density |
Chemical Composition |
![Cinnabar Cinnabar](https://www.just-color.com/sites/default/files/cinnabar-40.jpg) |
Cinnabar |
8.0-8.2 |
Mercury sulfide
|
![Cassiterite Cassiterite](https://www.just-color.com/sites/default/files/cassiterite-40.jpg) |
Cassiterite |
6.7-7.1 |
Tin oxide |
![Cerussite Cerussite](https://www.just-color.com/sites/default/files/cerussite-40.jpg) |
Cerussite |
6.46-6.57 |
Lead carbonate |
![Scheelite](https://www.just-color.com/sites/default/files/scheelite-40.jpg) |
Scheelite |
5.9-6.3 |
Calcium tungstate
|
![Cuprite Cuprite](https://www.just-color.com/sites/default/files/cuprite-40.jpg) |
Cuprite |
5.85-6.15 |
Copper oxide
|
![Hematite Hematite](https://www.just-color.com/sites/default/files/hematite-40.jpg) |
Hematite |
5.12-5.28 |
Iron oxide |
![Barite Barite](https://www.just-color.com/sites/default/files1/barite-40.jpg) |
Barite |
4.43-4.46 |
Barium sulfate |
![Spessartite Garnet Spessartite Garnet](https://www.just-color.com/sites/default/files/spessartite-garnet-40.jpg) |
Spessartite Garnet |
4.12-4.18 |
Manganese aluminum silicate
|
![Painite Painite](https://www.just-color.com/sites/default/files/painite1-40.jpg) |
Painite |
4.01 |
Calcium aluminum zirconium borate
|
![Smithsonite Smithsonite](https://www.just-color.com/sites/default/files/smithsonite-40.jpg) |
Smithsonite |
4.00-4.65 |
Zinc carbonate
|
![Natural Ruby Natural Ruby](https://www.just-color.com/sites/default/files/ruby-40.jpg) |
Ruby |
3.97-4.05 |
Aluminum oxide
|
![Star Ruby Star Ruby](https://www.just-color.com/sites/default/files/star-ruby2-40.jpg) |
Star Ruby |
3.97-4.05 |
Aluminum oxide
|
![Celestine](https://www.just-color.com/sites/default/files/celestine-40.jpg) |
Celestine |
3.97-4.00 |
Strontium sulfate
|
![Sapphire Sapphire](https://www.just-color.com/sites/default/files/blue-sapphire-40.jpg) |
Sapphire |
3.95-4.03 |
Aluminum oxide
|
![Star Sapphire Star Sapphire](https://www.just-color.com/sites/default/files/star-sapphire-40.jpg) |
Star Sapphire |
3.95-4.03 |
Aluminum oxide
|
![Zircon Zircon](https://www.just-color.com/sites/default/files/zircon-40.jpg) |
Zircon |
3.93-4.73 |
Zirconium silicate
|
![Almandine Garnet Almandine Garnet](https://www.just-color.com/sites/default/files/almandine-garnet-40.jpg) |
Almandine Garnet |
3.93-4.30 |
Iron aluminum silicate
|
![Sphalerite Sphalerite](https://www.just-color.com/sites/default/files/sphalerite-40.jpg) |
Sphalerite |
3.90-4.10 |
Zinc sulphide
|
![Rhodolite Garnet Rhodolite Garnet](https://www.just-color.com/sites/default/files/rhodolite-garnet-40.jpg) |
Rhodolite Garnet |
3.84 |
Magnesium aluminum silicate
|
![Color Change Garnet Color Change Garnet](https://www.just-color.com/sites/default/files/color-change-garnet-40.jpg) |
Color-Change Garnet |
3.78-3.85 |
Complex aluminum silicate
|
![Malaia Garnet Malaia Garnet](https://www.just-color.com/sites/default/files/malaia-garnet-40.jpg) |
Malaia Garnet |
3.78-3.85 |
Complex aluminum silicate
|
![Gaspeite Gaspeite](https://www.just-color.com/sites/default/files/gaspeite-40.jpg) |
Gaspeite |
3.71 |
Nickel magnesium iron carbonate
|
![Demantoid Garnet Demantoid Garnet](https://www.just-color.com/sites/default/files/demantoid-garnet-40.jpg) |
Demantoid Garnet |
3.7-4.1 |
Calcium iron silicate
|
![Azurite Azurite](https://www.just-color.com/sites/default/files/azurite-40.jpg) |
Azurite |
3.77-3.89 |
Basic copper carbonate
|
![Color Change Alexandrite Color Change Alexandrite](https://www.just-color.com/sites/default/files/alexandrite-40.jpg) |
Alexandrite |
3.70-3.78 |
Beryllium aluminum oxide
|
![Alexandite Cat's Eye Alexandite Cat's Eye](https://www.just-color.com/sites/default/files/alexandrite-cats-eye-40.jpg) |
Alexandrite Cat's Eye |
3.70-3.78 |
Beryllium aluminum oxide
|
![Chrysoberyl Chrysoberyl](https://www.just-color.com/sites/default/files/chrysoberyl-40.jpg) |
Chrysoberyl |
3.70-3.78 |
Beryllium aluminum oxide
|
![Chrysoberyl Cat's Eye Chrysoberyl Cat's Eye](https://www.just-color.com/sites/default/files/chrysoberyl-cats-eye-40.jpg) |
Chrysoberyl Cat's Eye |
3.70-3.78 |
Beryllium aluminum oxide
|
![Vanadium Chrysoberyl Vanadium Chrysoberyl](https://www.just-color.com/sites/default/files/vanadium-chrysoberyl-40.jpg) |
Vanadium Chrysoberyl |
3.70-3.78 |
Beryllium aluminum oxide
|
![Mali Garnet Mali Garnet](https://www.just-color.com/sites/default/files/mali-garnet-40.jpg) |
Mali Garnet |
3.65 |
Calcium aluminum silicate |
![Benitoite Benitoite](https://www.just-color.com/sites/default/files/benitoite-40.jpg) |
Benitoite |
3.64-3.68 |
Barium titanium silicate |
![Pyrope Garnet Pyrope Garnet](https://www.just-color.com/sites/default/files/pyrope-garnet-40.jpg) |
Pyrope Garnet |
3.62-3.87 |
Magnesium aluminum silicate
|
![Taaffeite Taaffeite](https://www.just-color.com/sites/default/files/taaffeite-40.jpg) |
Taaffeite |
3.60-3.62 |
Magnesium beryllium aluminum oxide
|
![Grossular Garnet Grossular Garnet](https://www.just-color.com/sites/default/files/grossular-garnet-40.jpg) |
Grossular Garnet |
3.56-3.73 |
Calcium aluminum silicate
|
![Hessonite Garnet Hessonite Garnet](https://www.just-color.com/sites/default/files/hessonite-garnet-40.jpg) |
Hessonite Garnet |
3.56-3.73 |
Calcium aluminum silicate
|
![Leuco Garnet Leuco Garnet](https://www.just-color.com/sites/default/files/leuco-garnet-40.jpg) |
Leuco Garnet |
3.56-3.73 |
Calcium aluminum silicate
|
![Tsavorite Garnet Tsavorite Garnet](https://www.just-color.com/sites/default/files/tsavorite-garnet-40.jpg) |
Tsavorite Garnet |
3.56-3.73 |
Calcium aluminum silicate
|
![Spinel Spinel](https://www.just-color.com/sites/default/files/spinel-40.jpg) |
Spinel |
3.54-3.63 |
Magnesium aluminum oxide
|
![Kyanite Kyanite](https://www.just-color.com/sites/default/files/kyanite-40.jpg) |
Kyanite |
3.53-3.70 |
Aluminum silicate
|
![Sphene (Titanite) Sphene (Titanite)](https://www.just-color.com/sites/default/files/sphene-40.jpg) |
Sphene (Titanite) |
3.52-3.54 |
Calcium titanium silicate
|
![Natural Diamond Natural Diamond](https://www.just-color.com/sites/default/files/diamond-40.jpg) |
Diamond |
3.50-3.53 |
Carbon |
![Imperial Topaz Imperial Topaz](https://www.just-color.com/sites/default/files/imperial-topaz-40.jpg) |
Imperial Topaz |
3.49-3.57 |
Aluminum fluosilicate
|
![Topaz Topaz](https://www.just-color.com/sites/default/files/topaz-40.jpg) |
Topaz |
3.49-3.57 |
Aluminum fluosilicate
|
![Sinhalite Sinhalite](https://www.just-color.com/sites/default/files/sinhalite-40.jpg) |
Sinhalite |
3.46-3.50 |
Magnesium aluminum borate
|
![Rhodochrosite Rhodochrosite](https://www.just-color.com/sites/default/files/rhodochrosite-40.jpg) |
Rhodochrosite |
3.45-3.70 |
Manganese carbonate
|
![Serendibite Serendibite](https://www.just-color.com/sites/default/files/serendibite-40.jpg) |
Serendibite |
3.42-3.52 |
Complex borosilicate
|
![Uvarovite Garnet Uvarovite Garnet](https://www.just-color.com/sites/default/files/uvarovite-garnet-40.jpg) |
Uvarovite Garnet |
3.41-3.52 |
Calcium chromium silicate |
![Rhodonite Rhodonite](https://www.just-color.com/sites/default/files/rhodonite-40.jpg) |
Rhodonite |
3.40-3.74 |
Manganese silicate
|
![Tanzanite Tanzanite](https://www.just-color.com/sites/default/files/tanzanite-40.jpg) |
Tanzanite |
3.35 |
Calcium aluminum silicate
|
![Idocrase (Vesuvianite) Idocrase (Vesuvianite)](https://www.just-color.com/sites/default/files/idocrase-40.jpg) |
Idocrase (Vesuvianite) |
3.32-3.47 |
Aluminum calcium silicate
|
![Epidote Epidote](https://www.just-color.com/sites/default/files/epidote1-40.jpg) |
Epidote |
3.3-3.5 |
Calcium aluminium iron sorosilicate
|
![Hemimorphite Hemimorphite](https://www.just-color.com/sites/default/files/hemimorphite-40.jpg) |
Hemimorphite |
3.30-3.50 |
Hydrous basic zinc siilcate
|
![Diaspore Diaspore](https://www.just-color.com/sites/default/files/diaspore-40.jpg) |
Diaspore |
3.30-3.39 |
Hydrated aluminum oxide
|
![Jadeite Jade Jadeite Jade](https://www.just-color.com/sites/default/files/jadeite-40.jpg) |
Jadeite Jade |
3.30-3.38 |
Sodium aluminum silicate
|
![Peridot Peridot](https://www.just-color.com/sites/default/files/peridot-40.jpg) |
Peridot |
3.28-3.48 |
Magnesium iron silicate
|
![Dioptase](https://www.just-color.com/sites/default/files/dioptase-40.jpg) |
Dioptase |
3.28-3.38 |
Copper cyclosilicate |
![Jeremejevite Jeremejevite](https://www.just-color.com/sites/default/files/jeremejevite-40.jpg) |
Jeremejevite |
3.28-3.31 |
Aluminum borate |
![Kornerupine Kornerupine](https://www.just-color.com/sites/default/files/kornerupine-40.jpg) |
Kornerupine |
3.27-3.45 |
Magnesium aluminum borosilicate |
![Dumortierite Dumortierite](https://www.just-color.com/sites/default/files/dumortierite-40.jpg) |
Dumortierite |
3.28-3.41 |
Aluminum borate silicate |
![Axinite Axinite](https://www.just-color.com/sites/default/files/axinite-40.jpg) |
Axinite |
3.26-3.36 |
Calcium aluminium borosilicate |
![Malachite Malachite](https://www.just-color.com/sites/default/files/malachite-40.jpg) |
Malachite |
3.25-4.10 |
Basic copper carbonate
|
![Sillimanite Sillimanite](https://www.just-color.com/sites/default/files/sillimanite-40.jpg) |
Sillimanite |
3.27-3.27 |
Aluminum silicate
|
![Chrome Diopside Chrome Diopside](https://www.just-color.com/sites/default/files/chrome-diopside-40.jpg) |
Chrome Diopside |
3.22-3.38 |
Calcium magnesium silicate
|
![Diopside Diopside](https://www.just-color.com/sites/default/files/diopside-40.jpg) |
Diopside |
3.22-3.38 |
Calcium magnesium silicate
|
![Enstatite Enstatite](https://www.just-color.com/sites/default/files/enstatite-40.jpg) |
Enstatite |
3.20-3.30 |
Magnesium silicate |
![Apatite Apatite](https://www.just-color.com/sites/default/files/apatite-40.jpg) |
Apatite |
3.16-3.23 |
Fluoro or chloro calcium phosphate |
![Cat's Eye Apatite Cat's Eye Apatite](https://www.just-color.com/sites/default/files/cats-eye-apatite-40.jpg) |
Cat's Eye Apatite |
3.16-3.23 |
Fluoro or chloro calcium phosphate
|
![Zoisite Zoisite](https://www.just-color.com/sites/default/files/zoisite-40.jpg) |
Zoisite |
3.15-3.38 |
Calcium aluminum silicate
|
![Hiddenite Hiddenite](https://www.just-color.com/sites/default/files/hiddenite-40.jpg) |
Hiddenite |
3.15-3.21 |
Lithium aluminum silicate
|
![Kunzite Kunzite](https://www.just-color.com/sites/default/files/kunzite-40.jpg) |
Kunzite |
3.15-3.21 |
Lithium aluminum silicate
|
![Spodumene Spodumene](https://www.just-color.com/sites/default/files/spodumene-40.jpg) |
Spodumene |
3.15-3.21 |
Lithium aluminum silicate
|
![Clinohumite Clinohumite](https://www.just-color.com/sites/default/files/clinohumite-40.jpg) |
Clinohumite |
3.13-3.75 |
Magnesium silicate
|
![Euclase Euclase](https://www.just-color.com/sites/default/files/euclase-40.jpg) |
Euclase |
3.10 |
Beryllium alum. hydroxide silicate |
![Andalusite Andalusite](https://www.just-color.com/sites/default/files/andalusite-40.jpg) |
Andalusite |
3.05-3.20 |
Aluminum silicate
|
![Actinolite Actinolite](https://www.just-color.com/sites/default/files/actinolite-40.jpg) |
Actinolite |
3.03-3.07 |
Basic calcium magnesium iron silicate |
![Amblygonite Amblygonite](https://www.just-color.com/sites/default/files/amblygonite-40.jpg) |
Amblygonite |
3.01-3.11 |
Lithium sodium aluminum flurophosphate |
![Fluorite Fluorite](https://www.just-color.com/sites/default/files/fluorite-40.jpg) |
Fluorite |
3.00-3.28 |
Calcium fluoride
|
![Brazilianite Brazilianite](https://www.just-color.com/sites/default/files/brazilianite-40.jpg) |
Brazilianite |
2.98-2.99 |
Sodium aluminum phosphate |
![Danburite Danburite](https://www.just-color.com/sites/default/files/danburite-40.jpg) |
Danburite |
2.97-3.03 |
Calcium boric silicate
|
![Grandidierite Grandidierite](https://www.just-color.com/sites/default/files1/grandidierite-40.jpg) |
Grandidierite |
2.97-3.03 |
Magnesium aluminum borosilicate |
![Phenakite Phenakite](https://www.just-color.com/sites/default/files/phenakite-40.jpg) |
Phenakite |
2.95-2.97 |
Beryllium silicate |
![Aragonite Aragonite](https://www.just-color.com/sites/default/files/aragonite-40.jpg) |
Aragonite |
2.94 |
Calcium carbonate |
![Pezzotaite Pezzotaite](https://www.just-color.com/sites/default/files/pezzotaite-40.jpg) |
Pezzotaite |
2.90-3.10 |
Caesium beryllium lithium alum. silicate
|
![Nephrite Jade Nephrite Jade](https://www.just-color.com/sites/default/files/nephrite-jade-40.jpg) |
Nephrite Jade |
2.90-3.03 |
Calcium aluminum iron silicate
|
![Datolite Datolite](https://www.just-color.com/sites/default/files/datolite-40.jpg) |
Datolite |
2.90-3.00 |
Calcium boron hydroxide nesosilicate |
![Chrome Tourmaline Chrome Tourmaline](https://www.just-color.com/sites/default/files/chrome-tourmaline-40.jpg) |
Chrome Tourmaline |
2.82-3.32 |
Soldium lithium boron silicate with chromium
|
![Paraiba Tourmaline Paraiba Tourmaline](https://www.just-color.com/sites/default/files/paraiba-tourmaline-40.jpg) |
Paraiba Tourmaline |
2.82-3.32 |
Soldium lithium boron silicate with copper
|
![Rubellite Tourmaline Rubellite Tourmaline](https://www.just-color.com/sites/default/files/rubellite-tourmaline-40.jpg) |
Rubellite Tourmaline |
2.82-3.32 |
Soldium lithium boron silicate
|
![Tourmaline Tourmaline](https://www.just-color.com/sites/default/files/tourmaline-40.jpg) |
Tourmaline |
2.82-3.32 |
Soldium lithium boron silicate
|
![Prehnite Prehnite](https://www.just-color.com/sites/default/files/prehnite-40.jpg) |
Prehnite |
2.82-2.94 |
Basic calcium aluminum silicate |
![Lepidolite Lepidolite](https://www.just-color.com/sites/default/files/lepidolite-40.jpg) |
Lepidolite |
2.80-2.90 |
Potassium aluminum lithium silicate |
![Sugilite Sugilite](https://www.just-color.com/sites/default/files/sugilite-40.jpg) |
Sugilite |
2.76-2.80 |
Pot. sodium lith. iron manganese alum. silicate |
![Ammolite Ammolite](https://www.just-color.com/sites/default/files/ammolite-40.jpg) |
Ammolite (Korite) |
2.75-2.80 |
Calcium carbonate |
![Eudialyte Eudialyte](https://www.just-color.com/sites/default/files/eudialyte-40.jpg) |
Eudialyte |
2.74-2.98 |
Zirconium silicate |
![Larimar Larimar](https://www.just-color.com/sites/default/files/larimar-40.jpg) |
Larimar (Pectolite) |
2.74-2.88 |
Sodium calcium inosilicate hydroxide |
![Calcite Calcite](https://www.just-color.com/sites/default/files/calcite-40.jpg) |
Calcite |
2.69-2.71 |
Calcium carbonate
|
![Cobaltoalcite Cobaltoalcite](https://www.just-color.com/sites/default/files1/cobaltocalcite-40.jpg) |
Cobaltocalcite |
2.69-2.71 |
Calcium carbonate & cobalt |
![Aquamarine Aquamarine](https://www.just-color.com/sites/default/files/aquamarine-40.jpg) |
Aquamarine |
2.68-2.74 |
Aluminum beryllium silicate
|
![Emerald Emerald](https://www.just-color.com/sites/default/files/emerald-40.jpg) |
Emerald |
2.67-2.78 |
Aluminum beryllium silicate
|
![Golden Beryl Golden Beryl](https://www.just-color.com/sites/default/files/golden-beryl-40.jpg) |
Golden Beryl |
2.66-2.87 |
Aluminum beryllium silicate
|
![Goshenite Beryl Goshenite Beryl](https://www.just-color.com/sites/default/files/goshenite-40.jpg) |
Goshenite Beryl |
2.66-2.87 |
Aluminum beryllium silicate
|
![Morganite Morganite](https://www.just-color.com/sites/default/files/morganite-40.jpg) |
Morganite |
2.66-2.87 |
Aluminum beryllium silicate
|
![Red Beryl Red Beryl](https://www.just-color.com/sites/default/files/red-beryl-40.jpg) |
Red Beryl (Bixbite) |
2.66-2.87 |
Aluminum beryllium silicate
|
![Labradorite Labradorite](https://www.just-color.com/sites/default/files/labradorite-40.jpg) |
Labradorite |
2.65-2.75 |
Sodium calcium aluminum silicate |
![Andesine Andesine](https://www.just-color.com/sites/default/files/andesine-40.jpg) |
Andesine |
2.65-2.69 |
Sodium calcium aluminum silicate
|
![Amethyst Amethyst](https://www.just-color.com/sites/default/files/amethyst-40.jpg) |
Amethyst |
2.65 |
Silicon dioxide
|
![Ametrine Ametrine](https://www.just-color.com/sites/default/files/ametrine-40.jpg) |
Ametrine |
2.65 |
Silicon dioxide
|
![Citrine Citrine](https://www.just-color.com/sites/default/files/citrine-40.jpg) |
Citrine |
2.65 |
Silicon dioxide
|
![Rock Crystal Rock Crystal](https://www.just-color.com/sites/default/files/rock-crystal-40.jpg) |
Rock Crystal |
2.65 |
Silicon dioxide
|
![Rose Quartz Rose Quartz](https://www.just-color.com/sites/default/files/rose-quartz-40.jpg) |
Rose Quartz |
2.65 |
Silicon dioxide
|
![Smoky Quartz Smoky Quartz](https://www.just-color.com/sites/default/files/smoky-quartz-40.jpg) |
Smoky Quartz |
2.65 |
Silicon dioxide
|
![Aventurine Aventurine](https://www.just-color.com/sites/default/files/aventurine-40.jpg) |
Aventurine |
2.64-2.69 |
Silicon dioxide
|
![Oligoclase Oligoclase](https://www.just-color.com/sites/default/files1/oligoclase-40.jpg) |
Oligoclase |
2.62-2.67 |
Sodium calcium aluminum silicate |
![Sunstone Sunstone](https://www.just-color.com/sites/default/files/sunstone-40.jpg) |
Sunstone |
2.62-2.65 |
Sodium calcium aluminum silicate |
![Pearl Pearl](https://www.just-color.com/sites/default/files/pearl-40.jpg) |
Pearl |
2.60-2.85 |
Calcium carbonate |
![Coral Coral](https://www.just-color.com/sites/default/files/coral-40.jpg) |
Coral |
2.60-2.70 |
Calcium carbonate |
![Agate Agate](https://www.just-color.com/sites/default/files/agate-40.jpg) |
Agate |
2.60-2.64 |
Silicon dioxide |
![Jasper Jasper](https://www.just-color.com/sites/default/files/jasper-40.jpg) |
Jasper |
2.58-2.91 |
Silicon dioxide |
![Iolite Iolite](https://www.just-color.com/sites/default/files/iolite-40.jpg) |
Iolite |
2.58-2.66 |
Magnesium aluminum silicate |
![Bloodstone Bloodstone](https://www.just-color.com/sites/default/files/bloodstone-40.jpg) |
Bloodstone |
2.58-2.64 |
Silicon dioxide
|
![Carnelian Carnelian](https://www.just-color.com/sites/default/files/carnelian1-40.jpg) |
Carnelian |
2.58-2.64 |
Silicon dioxide
|
![Chalcedony Chalcedony](https://www.just-color.com/sites/default/files/chalcedony-40.jpg) |
Chalcedony |
2.58-2.64 |
Silicon dioxide |
![Chrome Chalcedony Chrome Chalcedony](https://www.just-color.com/sites/default/files/chrome-chalcedony-40.jpg) |
Chrome Chalcedony |
2.58-2.64 |
Silicon dioxide
|
![Chrysoprase Chrysoprase](https://www.just-color.com/sites/default/files/chrysoprase-40.jpg) |
Chrysoprase |
2.58-2.64 |
Silicon dioxide
|
![Gem Silica Gem Silica](https://www.just-color.com/sites/default/files/gem-silica-40.jpg) |
Gem Silica |
2.58-2.64 |
Silicon dioxide
|
![Onyx Onyx](https://www.just-color.com/sites/default/files/onyx-40.jpg) |
Onyx |
2.58-2.64 |
Silicon dioxide |
![Scapolite Scapolite](https://www.just-color.com/sites/default/files/scapolite-40.jpg) |
Scapolite |
2.57-2.74 |
Sodium calcium aluminum silicate |
![Moonstone Moonstone](https://www.just-color.com/sites/default/files/moonstone-40.jpg) |
Moonstone |
2.56-2.59 |
Potassium aluminum silicate |
![Amazonite Amazonite](https://www.just-color.com/sites/default/files/amazonite-40.jpg) |
Amazonite |
2.56-2.58 |
Potassium aluminum silicate
|
![Orthoclase Orthoclase](https://www.just-color.com/sites/default/files/orthoclase-40.jpg) |
Orthoclase |
2.56-.2.58 |
Potassium aluminum silicate
|
![Charoite Charoite](https://www.just-color.com/sites/default/files/charoite-40.jpg) |
Charoite |
2.54-2.78 |
Complex alkaline calcic silicate |
![Williamsite Williamsite](https://www.just-color.com/sites/default/files1/williamsite-40.jpg) |
Williamsite |
2.51-2.63 |
Hydrous magnesium iron phyllosilicate |
![Poudretteite Poudretteite](https://www.just-color.com/sites/default/files/poudretteite-40.jpg) |
Poudretteite |
2.51-2.53 |
Potassium sodium boron silicate |
![Lapis Lazuli Lapis Lazuli](https://www.just-color.com/sites/default/files/lapis-lazuli-40.jpg) |
Lapis Lazuli |
2.50-3.00 |
Sodim calcium aluminium silicate |
![Howlite Howlite](https://www.just-color.com/sites/default/files/howlite-40.jpg) |
Howlite |
2.45-2.58 |
Calcium borosilicate hydroxide |
![Carletonite Carletonite](https://www.just-color.com/sites/default/files/carletonite1-40.jpg) |
Carletonite |
2.45 |
Hydrated pot. sodium calcium carb. silicate |
![Hauyne Hauyne](https://www.just-color.com/sites/default/files/hauyne-40.jpg) |
Hauyne |
2.40-2.50 |
Sodium aluminum silicate |
![Petalite Petalite](https://www.just-color.com/sites/default/files/petalite-40.jpg) |
Petalite |
2.40 |
Lithium aluminium phyllosilicate |
![Obsidian Obsidian](https://www.just-color.com/sites/default/files/obsidian-40.jpg) |
Obsidian |
2.35-2.60 |
Siliceous glassy rock |
![Hambergite Hambergite](https://www.just-color.com/sites/default/files/hambergite-40.jpg) |
Hambergite |
2.35 |
Beryllium borate |
![Moldavite Moldavite](https://www.just-color.com/sites/default/files/moldavite-40.jpg) |
Moldavite |
2.32-2.38 |
Silicon dioxide compound with other minerals |
![Turquoise Turquoise](https://www.just-color.com/sites/default/files/turquoise-40.jpg) |
Turquoise |
2.31-2.84 |
Hydrated copper aluminum phosphate |
![Hackmanite Hackmanite](https://www.just-color.com/sites/default/files/hackmanite-40.jpg) |
Hackmanite |
2.14-2.40 |
Sodium aluminum chloride silicate
|
![Sodalite Sodalite](https://www.just-color.com/sites/default/files/sodalite-40.jpg) |
Sodalite |
2.14-2.40 |
Sodium aluminum chloride silicate |
![Chrysocolla Chrysocolla](https://www.just-color.com/sites/default/files/chrysocolla-40.jpg) |
Chrysocolla |
2.00-2.40 |
Hydrous copper silicate |
![Mexican Fire Opal Mexican Fire Opal](https://www.just-color.com/sites/default/files/mexican-fire-opal-40.jpg) |
Mexican Fire Opal |
1.88-2.50 |
Hydrous silicon dioxide
|
![Opal Opal](https://www.just-color.com/sites/default/files/opal-40.jpg) |
Opal |
1.88-2.50 |
Hydrous silicon dioxide |
![Ulexite Ulexite](https://www.just-color.com/sites/default/files/ulexite-40.jpg) |
Ulexite |
1.65-1.95 |
Hydrated sodium calcium borate hydroxide |
![Jet](https://www.just-color.com/sites/default/files/jet-40.jpg) |
Jet |
1.19-1.35 |
Carbon (bituminous coal) |
![Amber Amber](https://www.just-color.com/sites/default/files/amber-40.jpg) |
Amber |
1.05-1.09 |
Fossilised organic resin
|