Rock Identifier

Category

Gemstone

Browse gemstone specimens identified by the Rock Identifier community.

Learn about Gemstone in the encyclopedia

Achroite

Alexandrite

Almandine Garnet

Almandine Garnet

Amber

Andamooka Opal

Andesine

Andesine-Labradorite

Andesine-Labradorite

Andradite Garnet

Andradite Garnet

Ant Hill Garnet

Ant Hill Garnet

Aquamarine

Australian Opal

Australian Opal

Aventurine Feldspar

Aventurine Feldspar

Carnelian / Agate (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Carnelian / Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Lake Superior Agate (Banded Chalcedony (Silicon Dioxide, SiO2)) — mineral

Lake Superior Agate

Banded Chalcedony (Silicon Dioxide, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Rhodochrosite Pebble (MnCO3 (Manganese Carbonate)) — mineral

Rhodochrosite Pebble

MnCO3 (Manganese Carbonate)

Lake Superior Agate (Silicon Dioxide (SiO2) - variety: banded chalcedony quartzite) — sedimentary

Lake Superior Agate

Silicon Dioxide (SiO2) - variety: banded chalcedony quartzite

Red Jasper (Silicon Dioxide (SiO2) with Iron inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Rhodonite (Manganese Silicate (MnSiO₃)) — mineral

Rhodonite

Manganese Silicate (MnSiO₃)

Zoisite with Ruby (Anyolite (Ca2Al3(SiO4)3(OH) with Al2O3:Cr)) — metamorphic

Zoisite with Ruby

Anyolite (Ca2Al3(SiO4)3(OH) with Al2O3:Cr)

Red Jasper (possibly banded Jaspilite) (Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)) — sedimentary

Red Jasper (possibly banded Jaspilite)

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

Sunstone (Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)) — mineral

Sunstone

Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)

Diamond (faceted) (Diamond (Pure Carbon, C)) — mineral

Diamond (faceted)

Diamond (Pure Carbon, C)

Jasper (Jasper (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Jasper

Jasper (Cryptocrystalline variety of Quartz, SiO2)

Moonstone (Orthoclase Feldspar ((K,Na)AlSi3O8)) — mineral

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Sunstone (Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8) — mineral

Sunstone

Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8

Moonstone (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Tiger's Eye (Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2) — Mineral

Tiger's Eye

Tiger's Eye (Pseudomorph of Quartz after Crocidolite), SiO2

Jasper (Silicon Dioxide (SiO2)) — sedimentary

Jasper

Silicon Dioxide (SiO2)

Garnet in Matrix (Schist or Quartz) (Almandine Garnet, Fe3Al2(SiO4)3) — metamorphic

Garnet in Matrix (Schist or Quartz)

Almandine Garnet, Fe3Al2(SiO4)3

Red Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — mineral

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Purple Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Purple Banded Agate

Cryptocrystalline Quartz (SiO2)

Rhodonite (Rhodonite (Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Red Jasper (Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Rough Tanzanite (Zoisite (Ca2Al3(SiO4)3(OH))) — mineral

Rough Tanzanite

Zoisite (Ca2Al3(SiO4)3(OH))

Sunstone (Oligoclase (Plagioclase Feldspar) - (Ca, Na)(Al, Si)4O8) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar) - (Ca, Na)(Al, Si)4O8

Turquoise (Rough) (Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise (Rough)

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Mystic Topaz (Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)) — mineral

Mystic Topaz

Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)

Citrine (Quartz (SiO₂) variety) — Mineral

Citrine

Quartz (SiO₂) variety

Quartz (Common Quartz/Citrine-toned) (Silicon Dioxide (SiO2)) — mineral

Quartz (Common Quartz/Citrine-toned)

Silicon Dioxide (SiO2)

Red Garnet (Pyrope or Almandine (X3Y2(SiO4)3)) — mineral

Red Garnet

Pyrope or Almandine (X3Y2(SiO4)3)

Moldavite (Moldavite (Siliceous vitreous substance)) — tektite (natural glass)

Moldavite

Moldavite (Siliceous vitreous substance)

tektite (natural glass)

Peridot (Olivine) (Olivine (Magnesium Iron Silicate), (Mg,Fe)2SiO4) — mineral

Peridot (Olivine)

Olivine (Magnesium Iron Silicate), (Mg,Fe)2SiO4

Moonstone (Orthoclase Feldspar) ((K,Na)AlSi3O8) — mineral

Moonstone (Orthoclase Feldspar)

(K,Na)AlSi3O8

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Turquoise (Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O

Turquoise (Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Turquoise (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Sunstone (Feldspar) (Plagioclase Feldspar (Na,Ca)(Al,Si)4O8) — mineral

Sunstone (Feldspar)

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Blue Tiger's Eye (Hawk's Eye) (Pseudomorph of Quartz after Crocidolite (SiO2)) — gemstone

Blue Tiger's Eye (Hawk's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Pearl (Calcium carbonate (Aragonite/Calcite) - CaCO3) — gemstone

Pearl

Calcium carbonate (Aragonite/Calcite) - CaCO3

Hessonite Garnet (Grossular) (Ca3Al2(SiO4)3 (Grossular Garnet)) — gemstone

Hessonite Garnet (Grossular)

Ca3Al2(SiO4)3 (Grossular Garnet)