Rock Identifier

Category

Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)

Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.

Chalcedony (specifically Agate or Moonstone-like Quartz) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (specifically Agate or Moonstone-like Quartz)

Silicon Dioxide (SiO2)

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

Smoky Quartz

Silicon Dioxide (SiO2)

mineral
Garnet (Almandine variety) (Almandine, Fe3Al2(SiO4)3) — Mineral

Garnet (Almandine variety)

Almandine, Fe3Al2(SiO4)3

Mineral
Schist (Mica Schist) — metamorphic

Schist

Mica Schist

metamorphic
Black Sand (Magnetite Sand) (Magnetite (Fe3O4)) — mineral

Black Sand (Magnetite Sand)

Magnetite (Fe3O4)

mineral
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper) (Chalcedony (SiO₂)) — Mineral (or mineraloid if microcrystalline)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Mineral (or mineraloid if microcrystalline)
Red Garnet (Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)) — mineral

Red Garnet

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

mineral
Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

metamorphic
Quartz Geode (Cracked) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Cracked)

Silicon Dioxide (SiO2)

mineral
Blue Sapphire (Synthetic or Man-made Glass Imitation) (Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic) — mineral

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

mineral
Chalcedony (specifically Common Opal or Agate variant) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (specifically Common Opal or Agate variant)

Silicon Dioxide (SiO2)

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

Black Tourmaline

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

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

Smoky Quartz

Silicon Dioxide (SiO2)

mineral
Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

mineral
Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

mineral
Citrine (Quartz (SiO₂)) — mineral

Citrine

Quartz (SiO₂)

mineral
Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

igneous
Granitic Pegmatite (Granite Pegmatite (coarse-grained intrusive igneous rock)) — igneous

Granitic Pegmatite

Granite Pegmatite (coarse-grained intrusive igneous rock)

igneous
Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Granite and Igneous Mix (Phaneritic Felsic to Mafic Intrusive Rocks) — igneous

Granite and Igneous Mix

Phaneritic Felsic to Mafic Intrusive Rocks

igneous
Granodiorite / Granite (Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)) — igneous

Granodiorite / Granite

Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)

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

Quartz Pebble (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

mineral
Magnetite (Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (Iron Ore)

Magnetite (Fe3O4)

mineral
Milky Quartz in Matrix (Silicon Dioxide (SiO2)) — mineral

Milky Quartz in Matrix

Silicon Dioxide (SiO2)

mineral
Sapphire (Corundum) (Corundum (Al2O3)) — mineral

Sapphire (Corundum)

Corundum (Al2O3)

mineral
Granite (Granite (a common type of Felsic Intrusive Igneous Rock)) — Igneous Rock

Granite

Granite (a common type of Felsic Intrusive Igneous Rock)

Igneous Rock
Hypersthene (Hypersthene ((Mg,Fe)SiO3)) — mineral

Hypersthene

Hypersthene ((Mg,Fe)SiO3)

mineral
Carnelian (Carnelian (SiO2)) — mineral

Carnelian

Carnelian (SiO2)

mineral
Quartz (Quartz (SiO₂)) — mineral

Quartz

Quartz (SiO₂)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Basalt (Basalt) — igneous

Basalt

Basalt

igneous
Granitic Pegmatite (Muscovite and Quartz) (Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)) — igneous

Granitic Pegmatite (Muscovite and Quartz)

Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)

igneous
Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

igneous
Garnet in Schist (Polished Tower) (Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist) — metamorphic

Garnet in Schist (Polished Tower)

Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist

metamorphic
Parti Sapphire (Corundum (Al2O3)) — mineral

Parti Sapphire

Corundum (Al2O3)

mineral
Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral / Sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Mineral / Sedimentary
Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

mineral
Granitic Pegmatite with Schorl Tourmaline (Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)) — igneous

Granitic Pegmatite with Schorl Tourmaline

Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)

igneous
Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Green Calcite

Calcium Carbonate (CaCO3)

mineral
Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

mineral