Rock Identifier

Category

Mineral (Organic Gemstone)

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

Learn about Mineral (Organic Gemstone) in the encyclopedia

Black Shale

Jet

Malachite

White seed-bead gemstone strand, likely freshwater pearl or shell pearl (Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image) — gemstone

White seed-bead gemstone strand, likely freshwater pearl or shell pearl

Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Moss Agate (Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides) — mineral

Moss Agate

Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides

Amber (Succinite (fossilized resin, C10H16O)) — mineral

Amber

Succinite (fossilized resin, C10H16O)

Amber (Succinite (approximate formula C10H16O)) — mineral

Amber

Succinite (approximate formula C10H16O)

Dyed Agate (Tumbled) (Silicon Dioxide (Chalcedony variety, artificially dyed)) — gemstone

Dyed Agate (Tumbled)

Silicon Dioxide (Chalcedony variety, artificially dyed)

Amber (Succinite (Formula: C10H16O)) — Mineraloid

Amber

Succinite (Formula: C10H16O)

Blue Apatite (Apatite - Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite - Ca5(PO4)3(F,Cl,OH)

Turquoise, Pearl, and Coral Necklace (CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)) — mineral

Turquoise, Pearl, and Coral Necklace

CuAl6(PO4)4(OH)8·4H2O (Turquoise) / CaCO3 (Pearl and Coral)

Pink Opal (Hydrated silica (SiO2 "n H2O)) — mineral

Pink Opal

Hydrated silica (SiO2 "n H2O)

Plume Agate (Cryptocrystalline Quartz (SiO2)) — Mineral/Gemstone

Plume Agate

Cryptocrystalline Quartz (SiO2)

Mineral/Gemstone

Pearl (Nacre (primarily aragonite, CaCO₃, in an organic conchiolin matrix)) — gemstone

Pearl

Nacre (primarily aragonite, CaCO₃, in an organic conchiolin matrix)

Moss Agate and Hematite (Silica (SiO2) with fibrous inclusions of Manganese or Iron; Hematite (Fe2O3)) — mineral

Moss Agate and Hematite

Silica (SiO2) with fibrous inclusions of Manganese or Iron; Hematite (Fe2O3)

Mookaite Jasper (Silicon Dioxide with Iron Oxide impurities (SiO2)) — mineral

Mookaite Jasper

Silicon Dioxide with Iron Oxide impurities (SiO2)

Yellow-brown translucent mineral fragment, likely citrine or amber (Quartz (SiO₂), if citrine; succinite (fossil resin), if amber) — mineral

Yellow-brown translucent mineral fragment, likely citrine or amber

Quartz (SiO₂), if citrine; succinite (fossil resin), if amber

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

Pearl (Calcium carbonate (CaCO3) in the form of aragonite) — gemstone

Pearl

Calcium carbonate (CaCO3) in the form of aragonite

Amber (likely Baltic amber) (Fossilized tree resin; chiefly polymerized diterpenoid resin (succinite)) — gemstone

Amber (likely Baltic amber)

Fossilized tree resin; chiefly polymerized diterpenoid resin (succinite)

Raw amber (Amber (fossilized plant resin; commonly succinite, C10H16O)) — gemstone

Raw amber

Amber (fossilized plant resin; commonly succinite, C10H16O)

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin

Fossil mammalian skull (Fossilized vertebrate bone; exact taxon cannot be determined from the image) — fossil

Fossil mammalian skull

Fossilized vertebrate bone; exact taxon cannot be determined from the image

Amber (Succinite (Resinous fossilized tree sap)) — Mineraloid

Amber

Succinite (Resinous fossilized tree sap)

Picture Jasper (SiO2) — mineral

Picture Jasper

SiO2

Amber (Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O) — mineral

Amber

Succinite (specifically for Baltic amber); Chemical formula approximately C10H16O

Amber (Fossilized Tree Resin (C10H16O)) — gemstone

Amber

Fossilized Tree Resin (C10H16O)

Pearl (Calcium Carbonate (CaCO3) - Aragonite/Calcite) — mineral

Pearl

Calcium Carbonate (CaCO3) - Aragonite/Calcite

Pearl (Calcium carbonate (principally Aragonite, CaCO3) with Conchiolin) — gemstone

Pearl

Calcium carbonate (principally Aragonite, CaCO3) with Conchiolin

Amber (Succiniferous fossil resin (C10H16O)) — mineral

Amber

Succiniferous fossil resin (C10H16O)

Amber (Succinates (fossilized tree resin), approximately C10H16O) — organic gemstone

Amber

Succinates (fossilized tree resin), approximately C10H16O

organic gemstone

Pearl and Garnet Glass (Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass) — mineral and glass

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

mineral and glass

Amber (Tumbled/Polished) (Succinite (Fossilized Tree Resin)) — mineraloid

Amber (Tumbled/Polished)

Succinite (Fossilized Tree Resin)

Pearl (Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)) — mineral

Pearl

Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)

Tumbled brown agate (likely moss or plume agate) (Microcrystalline quartz, chiefly chalcedony (SiO₂), with iron-oxide and possibly mineral inclusions) — gemstone

Tumbled brown agate (likely moss or plume agate)

Microcrystalline quartz, chiefly chalcedony (SiO₂), with iron-oxide and possibly mineral inclusions

Tufa Rock and Tumbled Gemstones (Calcareous Tufa (Calcium Carbonate, CaCO3)) — sedimentary

Tufa Rock and Tumbled Gemstones

Calcareous Tufa (Calcium Carbonate, CaCO3)

Precious Red Coral (Corallium rubrum (Calcium Carbonate, CaCO3)) — gemstone

Precious Red Coral

Corallium rubrum (Calcium Carbonate, CaCO3)

Yellow amber beads (Amber (fossilized tree resin; organic mineraloid, not a true mineral)) — gemstone

Yellow amber beads

Amber (fossilized tree resin; organic mineraloid, not a true mineral)

Amber (polished piece) (Fossilized tree resin; amber is an organic mineraloid, not a true mineral) — gemstone

Amber (polished piece)

Fossilized tree resin; amber is an organic mineraloid, not a true mineral

Amber (Fossilized plant resin; primarily organic terpenoid compounds (not a mineral)) — gemstone

Amber

Fossilized plant resin; primarily organic terpenoid compounds (not a mineral)

Amber (Rough) (Succinite (Resinite)) — gemstone

Amber (Rough)

Succinite (Resinite)

Tumbled moss agate (likely) (Chalcedony, microcrystalline quartz (SiO₂), with iron/manganese inclusions) — gemstone

Tumbled moss agate (likely)

Chalcedony, microcrystalline quartz (SiO₂), with iron/manganese inclusions

Red Coral (Corallium rubrum) — mineral

Red Coral

Corallium rubrum

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)