Rock Identifier

Category

Organic Gemstone (Mineraloid)

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

Learn about Organic Gemstone (Mineraloid) in the encyclopedia

Jet

Chert (Jasper variety) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Jasper variety)

Chert (Silicon Dioxide, SiO2)

Petrified Wood (Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO2 - Silicon Dioxide / Chalcedony)

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

Chert (Jasper/Flint variety)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Jasper or Flint type) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Jasper or Flint type)

Microcrystalline Quartz (SiO2)

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

Chert (Flint nodule)

Chert (SiO2)

Chert Pebble (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Pebble

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

Banded Chert / Flint (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert / Flint

Microcrystalline Quartz (SiO2)

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

Chert (Field Flint)

Microcrystalline Quartz (SiO2)

Pearl (Calcium Carbonate (CaCO3) in the form of orthorhombic Aragonite and Conchiolin) — mineral

Pearl

Calcium Carbonate (CaCO3) in the form of orthorhombic Aragonite and Conchiolin

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

Pearl

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

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert (Black Flint)

Silicon Dioxide (SiO2)

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

Chert (Chert Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Chalcedony/Agate)

Microcrystalline Quartz (SiO2)

Natural or Cultured Pearl (Calcium Carbonate (Aragonite and Conchiolin), CaCO3) — Mineral (Organic)

Natural or Cultured Pearl

Calcium Carbonate (Aragonite and Conchiolin), CaCO3

Mineral (Organic)

Jasper (Red-Brown) (Silicon Dioxide (SiO2) with Iron Oxide impurities) — sedimentary

Jasper (Red-Brown)

Silicon Dioxide (SiO2) with Iron Oxide impurities

Chert (Jasper/Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Nodule)

Silicon Dioxide (SiO2)

Pearl (Pearl (Calcium Carbonate with organic conchiolin, CaCO3)) — mineral

Pearl

Pearl (Calcium Carbonate with organic conchiolin, CaCO3)

Chert (Chalky/Gray Variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chalky/Gray Variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and Chert-based Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — Sedimentary

Chert (and Chert-based Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (and Quartzite) (Microcrystalline silica (SiO2)) — sedimentary

Chert (and Quartzite)

Microcrystalline silica (SiO2)

Chert (Iron-stained) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Pink variety)

Microcrystalline Quartz (SiO2)

Chert / Flint (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or cryptocrystalline quartz (SiO2)

Green Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with impurities

Chert (specifically Red Chert/Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Red Chert/Jasper variety)

Silicon Dioxide (SiO2)

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

Chert (Chalcedony)

Silicon Dioxide (SiO2)

Chert (varietal Flint or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (varietal Flint or Jasper)

Microcrystalline Quartz (SiO2)

Chert (Brown Variety) (Silicon dioxide (SiO2)) — sedimentary

Chert (Brown Variety)

Silicon dioxide (SiO2)

Chert (Flint Nodules) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (Flint Nodules)

Chert (Microcrystalline Quartz, SiO2)

Amber (Succinite (specifically for Baltic Amber), Formula: C10H16O) — Organic Gemstone (often associated with Sedimentary sequences)

Amber

Succinite (specifically for Baltic Amber), Formula: C10H16O

Organic Gemstone (often associated with Sedimentary sequences)

Chert (White-Tan variety) (Silicon dioxide (SiO2) / Microcrystalline Quartz) — sedimentary

Chert (White-Tan variety)

Silicon dioxide (SiO2) / Microcrystalline Quartz

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

Chert (Jasper variety)

Chert (SiO2)

Chert (specifically Tan/Yellow Chert) (Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)) — sedimentary

Chert (specifically Tan/Yellow Chert)

Chert (Microcrystalline or Cryptocrystalline Silica, SiO2)

Chert (Nodular) (Chert (SiO2 - Microcrystalline Quartz)) — sedimentary

Chert (Nodular)

Chert (SiO2 - Microcrystalline Quartz)

Chert (Flint) (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline or cryptocrystalline quartz (SiO2)

Chert (Iron-rich variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-rich variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Yellow Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Yellow Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (Commonly known as Flint or Jasper when pigmented) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Commonly known as Flint or Jasper when pigmented)

Microcrystalline or Cryptocrystalline Quartz (SiO2)