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

Amethyst (SiO2 (Silicon Dioxide with iron impurities)) — mineral

Amethyst

SiO2 (Silicon Dioxide with iron impurities)

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

Turquoise

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

Limonite with Opal infusion (FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)) — mineral

Limonite with Opal infusion

FeO(OH)·nH2O (Limonite) / SiO2·nH2O (Opal)

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

Peridot

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

Pink Tourmaline (Rubellite) (Elbaite (Complex Borosilicate)) — gemstone

Pink Tourmaline (Rubellite)

Elbaite (Complex Borosilicate)

Opalite (Synthetic Opalite Glass / Opalized Glass) — gemstone

Opalite

Synthetic Opalite Glass / Opalized Glass

Blue Chalcedony (Moonstone-like / Agate) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — gemstone

Blue Chalcedony (Moonstone-like / Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Moldavite (SiO2 (+ Al2O3, FeO, K2O) - Natural Tektite Glass) — gemstone

Moldavite

SiO2 (+ Al2O3, FeO, K2O) - Natural Tektite Glass

Mother of Pearl (Nacre) (Calcium Carbonate (Aragonite) with organic conchiolin) — gemstone

Mother of Pearl (Nacre)

Calcium Carbonate (Aragonite) with organic conchiolin

Diamond (or Simulant) (Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)) — gemstone

Diamond (or Simulant)

Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)

Turquoise (CuAl6(PO4)4(OH)8·4H2O) — gemstone

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Carnelian (Silicon Dioxide (SiO2)) — gemstone

Carnelian

Silicon Dioxide (SiO2)

Tiger's Eye (Silicified Crocidolite Pseudomorph (SiO2 with iron oxides)) — gemstone

Tiger's Eye

Silicified Crocidolite Pseudomorph (SiO2 with iron oxides)

Raw Amber / Resin Mineral (Succinite (Fossilized Tree Resin)) — gemstone

Raw Amber / Resin Mineral

Succinite (Fossilized Tree Resin)

Opalite (Synthetic Glass (Simulated Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Opal)

Dyed Agate / Ruby Quartz (SiO2 (Silicon Dioxide)) — gemstone

Dyed Agate / Ruby Quartz

SiO2 (Silicon Dioxide)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — gemstone

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Raw Sapphire (Corundum) (Aluminum oxide (Al2O3)) — gemstone

Raw Sapphire (Corundum)

Aluminum oxide (Al2O3)

Turquoise (possibly reconstituted or dyed howlite) (CuAl6(PO4)4(OH)8·4H2O (Hydrated Copper Aluminum Phosphate)) — gemstone

Turquoise (possibly reconstituted or dyed howlite)

CuAl6(PO4)4(OH)8·4H2O (Hydrated Copper Aluminum Phosphate)

Emerald (Rough) (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — gemstone

Emerald (Rough)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Rough Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — gemstone

Rough Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Citrine (Silicon Dioxide (SiO2) with ferric iron impurities) — gemstone

Citrine

Silicon Dioxide (SiO2) with ferric iron impurities

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — gemstone

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Diamond (C (Carbon)) — gemstone

Diamond

C (Carbon)

Diamond (C) — gemstone

Diamond

C

Rough Diamond (Uncut Diamond) (Native Carbon (C)) — gemstone

Rough Diamond (Uncut Diamond)

Native Carbon (C)

Amber (Fossilized Tree Resin (C10H16O)) — gemstone

Amber

Fossilized Tree Resin (C10H16O)

Rough Diamond (C (Native Carbon)) — gemstone

Rough Diamond

C (Native Carbon)

Fire Agate (Silicon Dioxide (SiO2 with iron oxide inclusions)) — gemstone

Fire Agate

Silicon Dioxide (SiO2 with iron oxide inclusions)

Clear Quartz (Rock Crystal) Bracelet (Silicon Dioxide (SiO2)) — gemstone

Clear Quartz (Rock Crystal) Bracelet

Silicon Dioxide (SiO2)

Moonstone (Orthoclase (KAlSi3O8) or Oligoclase with adularescence) — gemstone

Moonstone

Orthoclase (KAlSi3O8) or Oligoclase with adularescence

Red Agate (Carnelian) (Silicon Dioxide (SiO2)) — gemstone

Red Agate (Carnelian)

Silicon Dioxide (SiO2)

Rutilated Quartz Bracelet (Quartz (Silicon Dioxide, SiO2) with inclusions of Rutile (Titanium Dioxide, TiO2)) — gemstone

Rutilated Quartz Bracelet

Quartz (Silicon Dioxide, SiO2) with inclusions of Rutile (Titanium Dioxide, TiO2)

Amber (Succinite (C10H16O)) — gemstone

Amber

Succinite (C10H16O)

Moonstone (Rainbow Moonstone with Tourmaline) (White Labradorite (Feldspar variety) - (Na,Ca)(Al,Si)4O8) — gemstone

Moonstone (Rainbow Moonstone with Tourmaline)

White Labradorite (Feldspar variety) - (Na,Ca)(Al,Si)4O8

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Moonstone (Orthoclase feldspar (KAlSi3O8) with albite lamellae) — gemstone

Moonstone

Orthoclase feldspar (KAlSi3O8) with albite lamellae

Sapphire (Blue/Violet Rough) (Corundum (Al2O3)) — gemstone

Sapphire (Blue/Violet Rough)

Corundum (Al2O3)

Amethyst (Quartz (Silicon Dioxide with Iron impurities), SiO2) — gemstone

Amethyst

Quartz (Silicon Dioxide with Iron impurities), SiO2