Rock Identifier

Category

Organic Gemstone (Sedimentary Associations)

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

Learn about Organic Gemstone (Sedimentary Associations) in the encyclopedia

Sapropel

Bituminous Shale

Bituminous Shale

Black Shale

Red Garnet

Conglomerate

Quartzite Sandstone

Quartzite Sandstone

Breccia

Ironstone

Oil Shale

Jet

Petrified Wood

Amber

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

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Fossiliferous Limestone (Biogenic Sedimentary Rock) — sedimentary

Fossiliferous Limestone

Biogenic Sedimentary Rock

Chert (Green and Black Jasper variant) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Green and Black Jasper variant)

Cryptocrystalline Quartz (SiO2)

Amber (Succinite (Organic Mineraloid)) — mineral

Amber

Succinite (Organic Mineraloid)

Shale (Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)) — sedimentary

Shale

Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)

Mother of Pearl (Nacre) / Shell Fragment (Biogenic Calcium Carbonate (Aragonite and Conchiolin)) — fossil

Mother of Pearl (Nacre) / Shell Fragment

Biogenic Calcium Carbonate (Aragonite and Conchiolin)

Limestone Pebble with Crinoid Fossil (Calcium Carbonate (CaCO3) - Fossiliferous Limestone) — sedimentary

Limestone Pebble with Crinoid Fossil

Calcium Carbonate (CaCO3) - Fossiliferous Limestone

Dyed Pink Quartzite (Jadeite Simulant) (Silicon Dioxide (SiO2) with organic dye) — metamorphic

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Amber (Fossilized Tree Resin (C10H16O)) — gemstone

Amber

Fossilized Tree Resin (C10H16O)

Fossilized Shark Tooth (Selachimorpha fossil) — fossil

Fossilized Shark Tooth

Selachimorpha fossil

Unakite (Unakite (Epidote-Feldspar rock)) — Metamorphic rock

Unakite

Unakite (Epidote-Feldspar rock)

Metamorphic rock

Fossiliferous Sedimentary Rock (Sedimentary Rock with Invertebrate Fossil Imprint) — fossil

Fossiliferous Sedimentary Rock

Sedimentary Rock with Invertebrate Fossil Imprint

Chert (Jasper variation) (Chert (SiO2)) — sedimentary

Chert (Jasper variation)

Chert (SiO2)

Fluorite (Fluorite (CaF2)) — mineral

Fluorite

Fluorite (CaF2)

Amber (Succinite (Fossilized Tree Resin)) — gemstone

Amber

Succinite (Fossilized Tree Resin)

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

Tumbled amber

Amber (fossilized plant resin; commonly succinite, C10H16O)

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

Tumbled amber

Amber (fossilized plant resin; commonly succinite, C10H16O)

Freshwater Pearl (Calcium Carbonate (CaCO3) in the form of Aragonite and Calcite) — gemstone

Freshwater Pearl

Calcium Carbonate (CaCO3) in the form of Aragonite and Calcite

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

Chert (Yellow Jasper)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Limestone and Quartz Gravel with Petrified Wood (Sedimentary gravel aggregate and fossilized wood) — sedimentary

Limestone and Quartz Gravel with Petrified Wood

Sedimentary gravel aggregate and fossilized wood

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Chert (Flint nodule) (Chert (SiO2)) — sedimentary

Chert (Flint nodule)

Chert (SiO2)

Polished plume agate (Chalcedony (microcrystalline SiO₂) with iron-oxide inclusions) — mineral

Polished plume agate

Chalcedony (microcrystalline SiO₂) with iron-oxide inclusions

Coal (Coal (Sedimentary Rock / Organic Rock)) — sedimentary

Coal

Coal (Sedimentary Rock / Organic Rock)

Fossiliferous Limestone (Bioclastic Limestone (CaCO3)) — sedimentary

Fossiliferous Limestone

Bioclastic Limestone (CaCO3)

Fossil Crab (Decapoda (likely Avitelmessus or Raninidae family)) — sedimentary

Fossil Crab

Decapoda (likely Avitelmessus or Raninidae family)

Coal (Bituminous / Anthracite) (Organic Sedimentary Rock (Carbonaceous Rock)) — sedimentary

Coal (Bituminous / Anthracite)

Organic Sedimentary Rock (Carbonaceous Rock)

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

Bituminous Coal

Organic sedimentary rock (humic coal)

Fossilized Tooth Fragment (Vertebrate Fossil (Mammalia indet.)) — fossil

Fossilized Tooth Fragment

Vertebrate Fossil (Mammalia indet.)

Red coral beads (Precious coral, commonly Corallium rubrum (calcium-carbonate skeleton)) — gemstone

Red coral beads

Precious coral, commonly Corallium rubrum (calcium-carbonate skeleton)

Amber (Succinite (Fossilized Tree Resin)) — gemstone

Amber

Succinite (Fossilized Tree Resin)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Moss Agate (Chalcedony (Silicon Dioxide - SiO2) with inclusions) — Mineral

Moss Agate

Chalcedony (Silicon Dioxide - SiO2) with inclusions

Angel Skin Coral (Corallium rubrum / Corallium spp. (Calcium Carbonate, CaCO3)) — gemstone

Angel Skin Coral

Corallium rubrum / Corallium spp. (Calcium Carbonate, CaCO3)

Red coral cabochon (likely dyed or reconstructed coral) (Corallium rubrum or other calcareous coral; chiefly aragonite (CaCO₃)) — gemstone

Red coral cabochon (likely dyed or reconstructed coral)

Corallium rubrum or other calcareous coral; chiefly aragonite (CaCO₃)

Bituminous Coal (Organic Sedimentary Rock (Carbon-based)) — sedimentary

Bituminous Coal

Organic Sedimentary Rock (Carbon-based)

Baroque cultured pearl necklace (Pearl: nacre composed mainly of aragonite (CaCO₃) and conchiolin) — gemstone

Baroque cultured pearl necklace

Pearl: nacre composed mainly of aragonite (CaCO₃) and conchiolin

Quartz-rich iron-stained nodule (Microcrystalline quartz (SiO₂), possibly chalcedony with limonite/goethite staining) — mineral

Quartz-rich iron-stained nodule

Microcrystalline quartz (SiO₂), possibly chalcedony with limonite/goethite staining

Amber (Succinite (C10H16O)) — mineral

Amber

Succinite (C10H16O)

Chert (Chert Nodule with Chalky Cortex) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Chert Nodule with Chalky Cortex)

Silicon Dioxide (SiO2) - Microcrystalline Quartz