Rock Identifier

Category

Synthetic (Not A Natural Rock)

Browse synthetic (not a natural rock) specimens identified by the Rock Identifier community.

Learn about Synthetic (Not A Natural Rock) in the encyclopedia

Asphalt Rock

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Chalk

Zircon

Obsidian

Kimberlite

Emerald in Matrix

Emerald in Matrix

Tripolite

Guano

Halite

Aquamarine Matrix

Aquamarine Matrix

Rock Salt

Small white crystalline mineral fragment (Indeterminate; possibly calcite or quartz) — mineral

Small white crystalline mineral fragment

Indeterminate; possibly calcite or quartz

Synthetic Wolf Plush (Non-mineral) (Canis lupus similis (Prop material: Polyester & Synthetic fibers)) — Synthetic material/Textile

Synthetic Wolf Plush (Non-mineral)

Canis lupus similis (Prop material: Polyester & Synthetic fibers)

Synthetic material/Textile

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Ruby (Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)) — Mineral

Ruby

Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)

Red Sandstone Pebble (Sedimentary quartz sandstone) — sedimentary

Red Sandstone Pebble

Sedimentary quartz sandstone

Faceted yellow gemstone ring (Likely yellow sapphire (corundum), but exact identification requires testing; alternatives include citrine, chrysoberyl, or treated diamond.) — gemstone

Faceted yellow gemstone ring

Likely yellow sapphire (corundum), but exact identification requires testing; alternatives include citrine, chrysoberyl, or treated diamond.

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Cubic Zirconia (CZ) Jewelry (Zirconium dioxide (ZrO2)) — mineral (synthetic)

Cubic Zirconia (CZ) Jewelry

Zirconium dioxide (ZrO2)

mineral (synthetic)

Limonite (vibrant yellowish-brown iron oxide) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (vibrant yellowish-brown iron oxide)

Limonite (FeO(OH)·nH2O)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Bituminous Coal (Organic-rich sedimentary rock (Complex hydrocarbons)) — sedimentary

Bituminous Coal

Organic-rich sedimentary rock (Complex hydrocarbons)

Limonite / Ironstone Concretion (Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)) — sedimentary

Limonite / Ironstone Concretion

Hydrated Iron Oxide (FeO(OH)%C2%B7nH2O)

Blue Slag Glass (Amorphous Silica (Industrial byproduct)) — Antropogenic (Man-made glass byproduct)

Blue Slag Glass

Amorphous Silica (Industrial byproduct)

Antropogenic (Man-made glass byproduct)

Limonite Nodules / Goethite (Hydrated Iron Oxide-Hydroxide (FeO(OH)·nH2O / Fe2O3·nH2O)) — mineral

Limonite Nodules / Goethite

Hydrated Iron Oxide-Hydroxide (FeO(OH)·nH2O / Fe2O3·nH2O)

Lapis Lazuli (Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)) — metamorphic

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

Limonite (Ironstone) (Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))) — mineral

Limonite (Ironstone)

Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))

Sandstone (River Stone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (River Stone)

Arenite (composed primarily of SiO2)

Sandstone (likely Greywacke or Siltstone variety) (Arenite / Siltstone (primarily SiO2)) — sedimentary

Sandstone (likely Greywacke or Siltstone variety)

Arenite / Siltstone (primarily SiO2)

Limonite Concretion (Ironstone) (Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)) — sedimentary

Limonite Concretion (Ironstone)

Limonite (Hydrated Iron(III) Oxide-Hydroxide, FeO(OH)·nH2O)

Rounded river pebble (lithology unclear) (Indeterminate natural rock; no specific mineral or rock type can be identified from the image) — sedimentary

Rounded river pebble (lithology unclear)

Indeterminate natural rock; no specific mineral or rock type can be identified from the image

Fossil bivalve shell (Fossilized or calcitic bivalve, likely a scallop-type pectinid (Bivalvia: Pectinidae)) — fossil

Fossil bivalve shell

Fossilized or calcitic bivalve, likely a scallop-type pectinid (Bivalvia: Pectinidae)

Likely weathered iron-rich rock or slag fragment (Indeterminate; possibly limonite/goethite-bearing rock (FeO(OH)·nH₂O) or industrial iron slag) — mineral

Likely weathered iron-rich rock or slag fragment

Indeterminate; possibly limonite/goethite-bearing rock (FeO(OH)·nH₂O) or industrial iron slag

Limonite (Iron Ore Congcretion) (Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore Congcretion)

Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)

Greenstone / altered basalt fragment (Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing) — igneous

Greenstone / altered basalt fragment

Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing

Limonite Concretion (Ironstone) (Limonite (FeO(OH)·nH2O) / Goethite) — sedimentary

Limonite Concretion (Ironstone)

Limonite (FeO(OH)·nH2O) / Goethite

Polymer Clay (Mock Mineral) (Polyvinyl chloride (PVC) with plasticizers and pigment) — Synthetic material (Not a natural rock/mineral)

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Synthetic material (Not a natural rock/mineral)

Sandstone or Limestone (Arenite or Calcareous Sedimentary Rock) — Sedimentary

Sandstone or Limestone

Arenite or Calcareous Sedimentary Rock

Sandstone (Arenite (primarily Quartz Arenite)) — sedimentary

Sandstone

Arenite (primarily Quartz Arenite)

Painted Sandstone (Sandstone (clastic sedimentary rock) with acrylic/artistic coating) — sedimentary

Painted Sandstone

Sandstone (clastic sedimentary rock) with acrylic/artistic coating

Blue quartz (likely dyed or synthetic-treated quartz beads) (Quartz, silicon dioxide (SiO₂)) — mineral

Blue quartz (likely dyed or synthetic-treated quartz beads)

Quartz, silicon dioxide (SiO₂)

Polished labradorite cabochon (Labradorite, calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈) — mineral

Polished labradorite cabochon

Labradorite, calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Limonite (Iron Ore) (FeO(OH)·nH2O) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O

Yellow Ochre / Limonite (Hydrated ferric oxide (FeO(OH)·nH2O)) — mineral

Yellow Ochre / Limonite

Hydrated ferric oxide (FeO(OH)·nH2O)

Limonite Concretion (Hydrated Iron Oxide-Hydroxide, FeO(OH)·nH2O) — mineral

Limonite Concretion

Hydrated Iron Oxide-Hydroxide, FeO(OH)·nH2O

Goldstone (Red) (Aventurine Glass (Cupriferous glass)) — Synthetic Glass (Man-made)

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Synthetic Glass (Man-made)

Polished banded agate (probable) (Microcrystalline quartz, SiO₂ (chalcedony/agate)) — mineral

Polished banded agate (probable)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Quartzite with Quartz Veining (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite with Quartz Veining

Metamorphic Quartzite (SiO2)

Limonite Concretion (FeO(OH)·nH2O (Hydrated Iron Oxide)) — sedimentary

Limonite Concretion

FeO(OH)·nH2O (Hydrated Iron Oxide)

Rough Diamond (Uncut Diamond) (Native Carbon (C)) — gemstone

Rough Diamond (Uncut Diamond)

Native Carbon (C)

Carved limestone architectural fragment (Limestone, predominantly calcite (CaCO₃), possibly weathered fossiliferous or oolitic limestone) — sedimentary

Carved limestone architectural fragment

Limestone, predominantly calcite (CaCO₃), possibly weathered fossiliferous or oolitic limestone

Tumbled iron-rich stone, likely hematite-bearing jasper (Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite/goethite) — mineral

Tumbled iron-rich stone, likely hematite-bearing jasper

Jasper (microcrystalline quartz, SiO₂) with iron oxides, chiefly hematite/goethite