Rock Identifier

Category

Organic Gemstone (Not A Rock)

Browse organic gemstone (not a rock) specimens identified by the Rock Identifier community.

Learn about Organic Gemstone (Not A Rock) in the encyclopedia

Bituminous Shale

Bituminous Shale

Black Shale

Oil Shale

Lapis Lazuli

Jet

Pegmatite

Rock Salt

Rock Gypsum

Coral Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Chert (often called Flint in various colors) (Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint in various colors)

Silicon Dioxide (SiO2)

Fossiliferous Limestone (Coquina) (Calcite (CaCO3) with Bioclastic inclusions) — sedimentary

Fossiliferous Limestone (Coquina)

Calcite (CaCO3) with Bioclastic inclusions

Pearl (Calcium carbonate (CaCO3) in the form of Aragonite or Calcite) — mineral

Pearl

Calcium carbonate (CaCO3) in the form of Aragonite or Calcite

Chert (Nodule) (Microcrystalline or Cryptocrystalline Silica (SiO2)) — sedimentary

Chert (Nodule)

Microcrystalline or Cryptocrystalline Silica (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert (specifically Brown Chert or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Brown Chert or Jasper)

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Black Mountain Stone (Seiryu Stone) (Limestone with Calcite veins (CaCO3)) — sedimentary

Black Mountain Stone (Seiryu Stone)

Limestone with Calcite veins (CaCO3)

Green Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Green Chert

Microcrystalline Quartz (SiO2)

River-worn Chert (Microcrystalline Quartz (SiO2)) — sedimentary

River-worn Chert

Microcrystalline Quartz (SiO2)

Quartz-veined Limestone (Sedimentary limestone with quartz/calcite veinlets) — sedimentary

Quartz-veined Limestone

Sedimentary limestone with quartz/calcite veinlets

Fossiliferous Limestone (Biogenic Sedimentary Rock) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock

Amber (Succinite (approximate formula C10H16O)) — mineral

Amber

Succinite (approximate formula C10H16O)

Unknown Organic Object (likely a berry or fruit) (Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.) — Organic Material (likely a fruit or berry)

Unknown Organic Object (likely a berry or fruit)

Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.

Organic Material (likely a fruit or berry)

Amber (Succinite (amorphous organic polymer)) — mineral

Amber

Succinite (amorphous organic polymer)

Amber (Succinite) — Mineraloid

Amber

Succinite

Fossiliferous Limestone (Calcium Carbonate (CaCO3) with Organic Inclusions) — fossil

Fossiliferous Limestone

Calcium Carbonate (CaCO3) with Organic Inclusions

Pearl (Calcium Carbonate (primarily Aragonite and Calcite), CaCO3) — mineral

Pearl

Calcium Carbonate (primarily Aragonite and Calcite), CaCO3

Chert (Yellow Jasper variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Silicon Dioxide (SiO2)

Jasper (Silicon Dioxide (SiO2) microcrystalline quartz) — sedimentary

Jasper

Silicon Dioxide (SiO2) microcrystalline quartz

Fossilized Bone Fragment (Vertebrate Fossil) — fossil

Fossilized Bone Fragment

Vertebrate Fossil

Amber (Succinite (C10H16O)) — gemstone

Amber

Succinite (C10H16O)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Chert / Flint (Silicon Dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2)

Dalmatian Stone (Peralkaline Quartz-Feldspar Rock with Arfvedsonite) — igneous

Dalmatian Stone

Peralkaline Quartz-Feldspar Rock with Arfvedsonite

Lapis Lazuli (Complex mixture of minerals, primarily Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2) — metamorphic

Lapis Lazuli

Complex mixture of minerals, primarily Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Pearl (with Peridot) (Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4) — mineral

Pearl (with Peridot)

Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4

Chert / Flint (Silicon dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon dioxide (SiO2)

Bituminous Coal (Organic sedimentary rock (humic coal)) — sedimentary

Bituminous Coal

Organic sedimentary rock (humic coal)

Chert Pebble (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert Pebble

Chert (Microcrystalline Quartz, SiO2)

Dendritic Agate (Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions

Fossiliferous Shale (Laminated Mudrock with plant fossils) — sedimentary

Fossiliferous Shale

Laminated Mudrock with plant fossils

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Chert Concretion (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Concretion

Sedimentary Cryptocrystalline Quartz (SiO2)

Quartz pebble or seed/crumb (SiO2 (if quartz)) — mineral

Quartz pebble or seed/crumb

SiO2 (if quartz)

Amber (Fossilized Tree Resin) — gemstone

Amber

Fossilized Tree Resin

Amber (Succinite (organic hydrocarbon)) — mineraloid

Amber

Succinite (organic hydrocarbon)

Amber (Succinite (fossilized tree resin)) — fossil

Amber

Succinite (fossilized tree resin)

Amber (Succinicum (Formula: C10H16O)) — Mineraloid

Amber

Succinicum (Formula: C10H16O)

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

Amber

Succinite (fossilized resin, C10H16O)

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

Chert / Jasper

Microcrystalline Quartz (SiO2)

Chert (Brecciated Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Brecciated Chert)

Silicon Dioxide (SiO2)