Rock Identifier

Category

Mineral And Organic Gemstone

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

Amber (Succinurite (C10H16O)) — mineraloid

Amber

Succinurite (C10H16O)

Petrified Wood (Silicified Wood (SiO2 permineralization)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 permineralization)

Fossilized Shark Tooth (Basal Bone) (Otodus sp. (Mineralized Hydroxyapatite)) — sedimentary

Fossilized Shark Tooth (Basal Bone)

Otodus sp. (Mineralized Hydroxyapatite)

Dinosaur Fossil (Skull) (Dinosauria fossilis (Petrified Hydroxyapatite / Calcium Carbonate)) — sedimentary

Dinosaur Fossil (Skull)

Dinosauria fossilis (Petrified Hydroxyapatite / Calcium Carbonate)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Geode with Quartz Crystal Cavity (Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix) — sedimentary

Geode with Quartz Crystal Cavity

Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix

Petrified Wood (Silicified wood (primarily Quartz/Chalcedony, SiO2)) — metamorphic

Petrified Wood

Silicified wood (primarily Quartz/Chalcedony, SiO2)

Geode (Unopened) (Silica-rich concretion (SiO2)) — sedimentary

Geode (Unopened)

Silica-rich concretion (SiO2)

Fossilized Shark Tooth (Fragment) (Elasmobranchii fossil (likely Cretalamna or Squalicorax genus)) — sedimentary

Fossilized Shark Tooth (Fragment)

Elasmobranchii fossil (likely Cretalamna or Squalicorax genus)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Human Skin (Epidermis/Dermis) (Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)) — Mineral-like biological tissue

Human Skin (Epidermis/Dermis)

Integumentary tissue (High content of hydroxyapatite in bones, though the surface is biological)

Mineral-like biological tissue

Agatized Petrified Wood (Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood) — metamorphic

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Chert (Jasper variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variety)

Microcrystalline Quartz (SiO2)

Amber (Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O) — Organic mineraloid

Amber

Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O

Organic mineraloid

Amazonite (K(AlSi3O8) - Potassium Aluminum Silicate) — mineral

Amazonite

K(AlSi3O8) - Potassium Aluminum Silicate

Amazonite (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate)

Sunstone (Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions) — mineral

Sunstone

Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions

Emerald with Matrix (Emerald in Mica Schist) (Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities) — mineral

Emerald with Matrix (Emerald in Mica Schist)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Sunstone (Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)) — mineral

Sunstone

Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Amazonite (Amazonite (KAlSi3O8)) — mineral

Amazonite

Amazonite (KAlSi3O8)

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

Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

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

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Amazonite (Potassium Feldspar (Microcline), K(AlSi3O8)) — mineral

Amazonite

Potassium Feldspar (Microcline), K(AlSi3O8)

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)

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

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Amethyst (Silicon dioxide / Quartz (SiO2+Fe4+)) — mineral

Amethyst

Silicon dioxide / Quartz (SiO2+Fe4+)

Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Jasper with Quartz Vein (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper with Quartz Vein

Silicon Dioxide (SiO2) with impurities

Sandstone Concretion (Clastic sedimentary rock (primarily Quartz SiO2)) — sedimentary

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Sandstone (with carbonaceous plant fragments) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (with carbonaceous plant fragments)

Arenite (composed primarily of SiO2)

Chert (vuggy variety) (Microcrystalline silica (SiO2)) — sedimentary

Chert (vuggy variety)

Microcrystalline silica (SiO2)

Ammolite (Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)) — mineral

Ammolite

Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)

Petrified Wood (Silicified Wood (SiO2 - Silicon Dioxide)) — sedimentary

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Chert (specifically Yellow/Honey Jasper variety) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Yellow/Honey Jasper variety)

Cryptocrystalline Quartz (SiO2)

Chert (Septarian or Nodular variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Septarian or Nodular variety)

Microcrystalline Quartz (SiO2)

Amazonite (K(AlSi3O8), Microcline (potassium feldspar)) — mineral

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

Amazonite (Microcline (KAlSi3O8) with Pb impurities) — mineral

Amazonite

Microcline (KAlSi3O8) with Pb impurities

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

Amethyst

Quartz (Silicon Dioxide with Iron impurities), SiO2