Rock Identifier

Category

Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)

Browse organic gemstone (not a rock or mineral in the traditional sense, but bio mineralized material) specimens identified by the Rock Identifier community.

Garnet (Garnet Group (Silicate Minerals)) — mineral

Garnet

Garnet Group (Silicate Minerals)

mineral
Picture Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Petrified Wood

Silicified Wood (SiO2)

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

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

mineral
Raw Corundum (Sapphire/Ruby variant) (Aluminum oxide (Al2O3)) — mineral

Raw Corundum (Sapphire/Ruby variant)

Aluminum oxide (Al2O3)

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

Quartz pebble

Silicon Dioxide (SiO2)

mineral
Chert (Jasper-like Silicate) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper-like Silicate)

Microcrystalline quartz (SiO2)

sedimentary
Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

mineral
Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

mineral
Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

mineral
Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Fossilized Crinoid Stem Segment (Crinoid (Phylum Echinodermata, Class Crinoidea)) — sedimentary

Fossilized Crinoid Stem Segment

Crinoid (Phylum Echinodermata, Class Crinoidea)

sedimentary
Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

sedimentary
Stromatolite (Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)) — sedimentary

Stromatolite

Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)

sedimentary
Tufa (Calcareous Tufa (CaCO3)) — sedimentary

Tufa

Calcareous Tufa (CaCO3)

sedimentary
Emerald (Beryl (Be3Al2(SiO3)6) with chromium/vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with chromium/vanadium impurities

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Aragonite Star Cluster (Aragonite (CaCO3)) — mineral

Aragonite Star Cluster

Aragonite (CaCO3)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral
Yellow Aventurine (Quartz (Silicon Dioxide) with Mica inclusions (SiO2)) — mineral

Yellow Aventurine

Quartz (Silicon Dioxide) with Mica inclusions (SiO2)

mineral
Chert Nodules (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert Nodules

Chert (Silicon Dioxide, SiO2)

sedimentary
Limestone with Iron Inclusions (Calcium Carbonate (CaCO3) with Hematite/Limonite) — sedimentary

Limestone with Iron Inclusions

Calcium Carbonate (CaCO3) with Hematite/Limonite

sedimentary
Milky Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Geode Fragment

Silicon Dioxide (SiO2)

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

Fossilized Shark Tooth (Fragment)

Elasmobranchii fossil (likely Cretalamna or Squalicorax genus)

sedimentary
Chert (Chalcedony/Agate) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

sedimentary
Diamond (in a gold setting) (Carbon (C)) — mineral

Diamond (in a gold setting)

Carbon (C)

mineral
Schist (Mica Schist) — metamorphic

Schist

Mica Schist

metamorphic
Banded Flint (Chert) (Silicon Dioxide (SiO2)) — sedimentary

Banded Flint (Chert)

Silicon Dioxide (SiO2)

sedimentary
Septarian Nodule (Septarian Concretion) — sedimentary

Septarian Nodule

Septarian Concretion

sedimentary
Bornite (Bornite (Cu5FeS4)) — mineral

Bornite

Bornite (Cu5FeS4)

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

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

mineral
Diamond (Natural Diamond (Carbon, C)) — mineral

Diamond

Natural Diamond (Carbon, C)

mineral
Carborundum (Silicon Carbide (SiC)) — mineral

Carborundum

Silicon Carbide (SiC)

mineral
Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

mineral
Citrine (Crystalline Quartz (SiO2) with iron impurities) — mineral

Citrine

Crystalline Quartz (SiO2) with iron impurities

mineral
Asphalt Concrete (Bituminous Concrete) (Bituminous aggregate) — sedimentary

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Quartz with Iron Staining (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite inclusions

mineral
Tiger's Eye (Silicon Dioxide (SiO2) with fibrous inclusions) — mineral

Tiger's Eye

Silicon Dioxide (SiO2) with fibrous inclusions

mineral
Rose Quartz (Silicon dioxide (SiO2) with trace elements of Titanium, Iron, or Manganese) — mineral

Rose Quartz

Silicon dioxide (SiO2) with trace elements of Titanium, Iron, or Manganese

mineral
Aragonite Star Cluster (Aragonite (Calcium Carbonate, CaCO3)) — mineral

Aragonite Star Cluster

Aragonite (Calcium Carbonate, CaCO3)

mineral
Banded Chert (Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Cryptocrystalline Quartz (SiO2)

sedimentary