Rock Identifier

Category

Organic Gemstone (Sedimentary Associations)

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

Clear Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Crystal

Silicon Dioxide (SiO2)

mineral
Carnelian (Carnelian (Silica, SiO2)) — mineral

Carnelian

Carnelian (Silica, SiO2)

mineral
Red Jasper (River Polished) (Jasper (Silicon Dioxide, SiO2)) — sedimentary/mineral

Red Jasper (River Polished)

Jasper (Silicon Dioxide, SiO2)

sedimentary/mineral
Jasper pebble (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary (secondary classification: cryptocrystalline quartz)

Jasper pebble

Silicon dioxide (SiO2) with iron oxide inclusions

sedimentary (secondary classification: cryptocrystalline quartz)
Baroque Pearl (Biogenic Calcium Carbonate (Aragonite/Conchiolin)) — mineral

Baroque Pearl

Biogenic Calcium Carbonate (Aragonite/Conchiolin)

mineral
Amber (with potentially inclusions) (Succinite (Fossilized Tree Resin)) — Mineraloid

Amber (with potentially inclusions)

Succinite (Fossilized Tree Resin)

Mineraloid
Chert (Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Kyanite (Purple variety) (Kyanite (Al₂SiO₅)) — metamorphic

Kyanite (Purple variety)

Kyanite (Al₂SiO₅)

metamorphic
Quartz (Smoky/Milky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

mineral
Carnelian (Red Chalcedony) (Silicon Dioxide (SiO2) with iron oxide impurities) — mineral

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

mineral
Honey Calcite (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite

Calcium Carbonate (CaCO3)

mineral
Potassium Feldspar (Orthoclase (KAlSi3O8)) — mineral

Potassium Feldspar

Orthoclase (KAlSi3O8)

mineral
Quartz River Pebble with Algae (Silicon Dioxide (SiO2) with organic biofilm) — metamorphic or igneous

Quartz River Pebble with Algae

Silicon Dioxide (SiO2) with organic biofilm

metamorphic or igneous
Opal (Hydrated silica (SiO2·nH2O)) — mineraloid

Opal

Hydrated silica (SiO2·nH2O)

mineraloid
Clear Quartz Crystal (Quartz (Silicon Dioxide - SiO2)) — mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide - SiO2)

mineral
Fuchsite (Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral

Fuchsite

Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)

mineral
Pink Rhodonite (Manganese Silicate (MnSiO3)) — mineral

Pink Rhodonite

Manganese Silicate (MnSiO3)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary
Pyrite in Quartz (Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)) — mineral

Pyrite in Quartz

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

mineral
Almandine Garnet (Almandine [Fe3Al2(SiO4)3]) — mineral

Almandine Garnet

Almandine [Fe3Al2(SiO4)3]

mineral
Quartz (Chert/Chalcedony variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

mineral
Wood Jasper (Siliceous sedimentary rock (variety of Chert/Chalcedony)) — Sedimentary

Wood Jasper

Siliceous sedimentary rock (variety of Chert/Chalcedony)

Sedimentary
Clear Quartz (Silicon Dioxide (SiO2)) — Mineral

Clear Quartz

Silicon Dioxide (SiO2)

Mineral
Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Clear Quartz

Silicon Dioxide (SiO2)

mineral
Red Jasper (Silicon dioxide with hematite impurities (SiO2 + Fe2O3)) — mineral

Red Jasper

Silicon dioxide with hematite impurities (SiO2 + Fe2O3)

mineral
Banded Agate (specifically Sardonyx or Carnelian Agate) (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Banded Agate (specifically Sardonyx or Carnelian Agate)

Silicon Dioxide (SiO2) - Chalcedony variety

mineral
Blue Celestite (with Galena) (Strontium sulfate (SrSO4) and Lead sulfide (PbS)) — mineral

Blue Celestite (with Galena)

Strontium sulfate (SrSO4) and Lead sulfide (PbS)

mineral
Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — Mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Mineral
Yellow Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral
Nacre (Mother of Pearl) (Nacre (Biogenic Aragonite/Calcite composite, CaCO3)) — mineral

Nacre (Mother of Pearl)

Nacre (Biogenic Aragonite/Calcite composite, CaCO3)

mineral
Pyrite (on host rock) (Iron Sulfide (FeS2)) — mineral

Pyrite (on host rock)

Iron Sulfide (FeS2)

mineral
Amber (Succinite (Fossilized Tree Resin)) — mineraloid

Amber

Succinite (Fossilized Tree Resin)

mineraloid
Amber (Succinite (fossilized tree resin)) — mineraloid

Amber

Succinite (fossilized tree resin)

mineraloid
Amber (Succinite (Formula: C10H16O)) — Organic Mineraloid

Amber

Succinite (Formula: C10H16O)

Organic Mineraloid
Amber (Succinite) — Organic Mineral

Amber

Succinite

Organic Mineral
Specular Hematite with Pyrite (Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)) — mineral

Specular Hematite with Pyrite

Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)

mineral
Pyrite (on Quartz matrix) (Iron Sulfide (FeS2)) — mineral

Pyrite (on Quartz matrix)

Iron Sulfide (FeS2)

mineral
Quartz Geode (Silicon Dioxide (SiO2) - Crystalline Quartz) — mineral

Quartz Geode

Silicon Dioxide (SiO2) - Crystalline Quartz

mineral
Shungite (Non-crystalline carbon (Fullerenes)) — metamorphic

Shungite

Non-crystalline carbon (Fullerenes)

metamorphic
Angelite (Anhydrous Calcium Sulfate (CaSO4)) — mineral

Angelite

Anhydrous Calcium Sulfate (CaSO4)

mineral
Garnet in Matrix (Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)) — metamorphic

Garnet in Matrix

Almandine or Spessartine Garnet in Quartz/Schist Matrix (X3Al2(SiO4)3)

metamorphic