Rock Identifier

Category

Organic (If Resin) Or Synthetic (If Glass); Simulating Sedimentary Or Metamorphic (For Natural Stones)

Browse organic (if resin) or synthetic (if glass); simulating sedimentary or metamorphic (for natural stones) specimens identified by the Rock Identifier community.

Pink Dyed Agate (Silicon Dioxide (SiO2) with synthetic pigment) — mineral

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Painted River Rock (Painted Quartzite or Smooth Siltstone) — sedimentary

Painted River Rock

Painted Quartzite or Smooth Siltstone

Blue lace agate (tumbled) (Microcrystalline quartz, SiO₂ (chalcedony variety)) — mineral

Blue lace agate (tumbled)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Amber (Succinite (Fossilized Tree Resin, C10H16O)) — gemstone

Amber

Succinite (Fossilized Tree Resin, C10H16O)

Yellow Quartz (Citrine Quartzite) (Silicon Dioxide (SiO2)) — metamorphic

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Quartz Pebble (River Agate / Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (River Agate / Chalcedony)

Silicon Dioxide (SiO2)

Mixed Quartz and River Pebbles (Stone Collection) (Mixed assortment containing mainly Silicon Dioxide (SiO2)) — igneous, sedimentary, metamorphic, and mineral

Mixed Quartz and River Pebbles (Stone Collection)

Mixed assortment containing mainly Silicon Dioxide (SiO2)

igneous, sedimentary, metamorphic, and mineral

Sandstone (Arenite (Clastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

River Stone (likely Mudstone or Siltstone) (Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)) — sedimentary

River Stone (likely Mudstone or Siltstone)

Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Turquoise (Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)

Anthracite Coal (Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)) — metamorphic

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock transitioned to metamorphic)

Chert (specifically Flint or Jasper variant) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Flint or Jasper variant)

Microcrystalline quartz (SiO2)

Adventurine (Green) (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Adventurine (Green)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Magnetic Hematite (Man-made) (Iron Oxide (Fe2O3) with Barium-Strontium Ferrite) — mineral

Magnetic Hematite (Man-made)

Iron Oxide (Fe2O3) with Barium-Strontium Ferrite

Chert (Hag Stone / Hole Stone) (Chert (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Chert (Hag Stone / Hole Stone)

Chert (Cryptocrystalline variety of Quartz, SiO2)

Mixed polished river stones (Likely quartz, quartzite, chert/jasper, and possibly limestone or marble) — mineral

Mixed polished river stones

Likely quartz, quartzite, chert/jasper, and possibly limestone or marble

Amber (Succinite (Resinite)) — fossil

Amber

Succinite (Resinite)

Green Aventurine (Aventurine Quartz (SiO2 with inclusions of Fuchsite)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Green Aventurine (Quartzite with Fuchsite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Quartzite with Fuchsite (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Faceted pale-green gemstone, likely prasiolite or green quartz (Quartz (SiO₂), likely prasiolite; identification is uncertain from the photograph) — gemstone

Faceted pale-green gemstone, likely prasiolite or green quartz

Quartz (SiO₂), likely prasiolite; identification is uncertain from the photograph

Green Aventurine (Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Black Tourmaline (Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)) — mineral

Black Tourmaline

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Slag Glass (Cullet) (Amorphous Silica (man-made), primarily SiO2 with trace metal oxides) — Mineraloid / Synthetic Glass

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Mineraloid / Synthetic Glass

Green Aventurine (Aventurine Quartz (SiO2 with inclusions of Fuchsite)) — mineral

Green Aventurine

Aventurine Quartz (SiO2 with inclusions of Fuchsite)

Ironstone Concretion (Ironstone (Siderite/Goethite/Hematite matrix)) — sedimentary

Ironstone Concretion

Ironstone (Siderite/Goethite/Hematite matrix)

Green Aventurine (Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Goldstone (blue-goldstone–style glass) beads (Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral) — mineral

Goldstone (blue-goldstone–style glass) beads

Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral

Blue Quartzite (likely dyed) (Silicon dioxide (SiO2) with likely color treatment) — metamorphic

Blue Quartzite (likely dyed)

Silicon dioxide (SiO2) with likely color treatment

Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Green Aventurine (Quartzite with Fuchsite inclusions (SiO2)) — metamorphic

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Amber (Succinicum (Organic compound, primarily C10H16O)) — Organic Gemstone (Mineraloid)

Amber

Succinicum (Organic compound, primarily C10H16O)

Organic Gemstone (Mineraloid)

Polished Tumbled Stone (Dark Chalcedony / Jasper) (Silicon Dioxide (SiO2)) — mineral

Polished Tumbled Stone (Dark Chalcedony / Jasper)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon dioxide (SiO2)

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

Chert Concretion (Flint)

Silicon Dioxide (SiO2)

Aventurine (Green) (Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2) — metamorphic

Aventurine (Green)

Silicon Dioxide (Quartz) with inclusions typically of Fuchsite; SiO2

Vuggy Limestone (Carbonate Sedimentary Rock with Vuggy Porosity (CaCO3)) — sedimentary

Vuggy Limestone

Carbonate Sedimentary Rock with Vuggy Porosity (CaCO3)