Rock Identifier

Category

Mineral And Organic Gemstone

Browse mineral and organic gemstone specimens identified by the Rock Identifier community.

Banded Agate (specifically Sardonyx or Carnelian Agate) (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Banded Agate (specifically Sardonyx or Carnelian Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

Carnelian Agate Nodule (Silicon Dioxide (SiO2) - Carnelian Chalcedony) — mineral

Carnelian Agate Nodule

Silicon Dioxide (SiO2) - Carnelian Chalcedony

Blue Celestite (with Galena) (Strontium sulfate (SrSO4) and Lead sulfide (PbS)) — mineral

Blue Celestite (with Galena)

Strontium sulfate (SrSO4) and Lead sulfide (PbS)

Agate (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz) (Silicon Dioxide (SiO2) with iron inclusions) — mineral

Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz)

Silicon Dioxide (SiO2) with iron inclusions

Mixed Gemstone Collection (SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)) — mineral

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Carnelian (Chalcedony (Silicon Dioxide, SiO2 with Iron Oxide impurities)) — mineral

Carnelian

Chalcedony (Silicon Dioxide, SiO2 with Iron Oxide impurities)

Rough Green Sapphire (Corundum) (Corundum (Al2O3 - Aluminum Oxide with trace elements)) — mineral

Rough Green Sapphire (Corundum)

Corundum (Al2O3 - Aluminum Oxide with trace elements)

Specular Hematite (Hematite (Iron Oxide, Fe2O3)) — mineral

Specular Hematite

Hematite (Iron Oxide, Fe2O3)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Mica)) — mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Mica)

Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine appearance) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine appearance)

Silicon Dioxide (SiO2)

Orthoclase Feldspar (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Orthoclase Feldspar

Potassium Aluminum Silicate (KAlSi3O8)

Carnelian (SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony) — mineral

Carnelian

SiO2 (Silicon Dioxide) - Translucent reddish-brown variety of Chalcedony

Banded Agate (Onyx type) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Almandine Garnet (Almandite (Fe3Al2(SiO4)3)) — Mineral

Almandine Garnet

Almandite (Fe3Al2(SiO4)3)

Citrine (Yellow Quartz) (Silicon Dioxide (SiO2)) — Mineral

Citrine (Yellow Quartz)

Silicon Dioxide (SiO2)

Amethyst Quartz (SiO2 (Silicon Dioxide)) — Mineral

Amethyst Quartz

SiO2 (Silicon Dioxide)

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]

Banded Agate / Lace Agate (Agate (Silica/Quartz) - SiO2) — mineral

Banded Agate / Lace Agate

Agate (Silica/Quartz) - SiO2

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Labradorite (Labradorite (Ca,Na)(Al,Si)4O8) — mineral

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Rough Aquamarine (Beryl (Be₃Al₂Si₆O‑₁•H₂O)) — Mineral

Rough Aquamarine

Beryl (Be₃Al₂Si₆O‑₁•H₂O)

Limonite (Iron Ore) (Hydrous ferric oxides (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Hydrous ferric oxides (FeO(OH)·nH2O)

Smoky Quartz (Smoky Quartz (SiO2: Silicon Dioxide)) — mineral

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Carnelian (Carnelian (a variety of Chalcedony, SiO2)) — Mineral

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Yellow Quartz (Iron-stained Quartz) (Quartz (Silicon Dioxide, SiO2) with Hematite/Limonite impurities) — mineral

Yellow Quartz (Iron-stained Quartz)

Quartz (Silicon Dioxide, SiO2) with Hematite/Limonite impurities

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz / Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

Opal (Hydrated amorphous silica (SiO2·nH2O)) — mineral

Opal

Hydrated amorphous silica (SiO2·nH2O)

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

Amethyst

Amethyst (Silicon Dioxide with iron impurities), SiO2

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Opal (Hydrated Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Silica (SiO2·nH2O)

Quartz (Silicon dioxide (SiO2)) — Mineral

Quartz

Silicon dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Garnet (likely Almandine) (Almandine (Fe3Al2(SiO4)3)) — mineral

Garnet (likely Almandine)

Almandine (Fe3Al2(SiO4)3)

Dragon Stone (Dragon Blood Jasper) (Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Dragon Stone (Dragon Blood Jasper)

Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))