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.

Diabase (Greenstone) (Diabase (also known as Dolerite)) — igneous

Diabase (Greenstone)

Diabase (also known as Dolerite)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Red Sandstone (Arenite (Fe2O3 rich)) — sedimentary

Red Sandstone

Arenite (Fe2O3 rich)

Biotite Mica in Quartz (Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) in Quartz (SiO2)) — mineral

Biotite Mica in Quartz

Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) in Quartz (SiO2)

Orthoclase Feldspar (Sunstone variety) (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Orthoclase Feldspar (Sunstone variety)

KAlSi3O8 (Potassium Aluminum Silicate)

Biotite (Black Mica) (Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)) — mineral

Biotite (Black Mica)

Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Labradorite (Feldspar (variety of Anorthite), (Ca,Na)(Al,Si)4O8) — mineral

Labradorite

Feldspar (variety of Anorthite), (Ca,Na)(Al,Si)4O8

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Citrine (Yellow Quartz) (Silicon Dioxide (SiO2)) — Mineral

Citrine (Yellow Quartz)

Silicon Dioxide (SiO2)

Moonstone (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Sunstone (Plagioclase feldspar (with Copper or Hematite inclusions)) — mineral

Sunstone

Plagioclase feldspar (with Copper or Hematite inclusions)

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — igneous

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Bixbyite on Rhyolite (Bixbyite (Mn2+,Fe3+)2O3) — mineral

Bixbyite on Rhyolite

Bixbyite (Mn2+,Fe3+)2O3

River Pebble (Basalt) (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

River Pebble (Basalt)

Basalt (Aphanitic Mafic Igneous Rock)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Quartzite (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Prehnite (Prehnite Ca2Al2Si3O10(OH)2) — mineral

Prehnite

Prehnite Ca2Al2Si3O10(OH)2

Amethyst (Quartz (SiO2) with trace iron impurities) — Mineral

Amethyst

Quartz (SiO2) with trace iron impurities

Yellow Chalcedony (Agate) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Rose Quartz (Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Mica (likely Muscovite) (Muscovite / KAl2(AlSi3O10)(OH)2) — mineral

Mica (likely Muscovite)

Muscovite / KAl2(AlSi3O10)(OH)2

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Yellow Jasper) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Yellow Jasper)

Silicon Dioxide (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz (Silicon Dioxide (SiO2)) — Mineral

Quartz

Silicon Dioxide (SiO2)

Grey Agate (Silicon Dioxide (SiO2) - Variety of Chalcedony) — mineral

Grey Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Hypersthene (Hypersthene (formula: (Mg,Fe)SiO3)) — mineral

Hypersthene

Hypersthene (formula: (Mg,Fe)SiO3)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

Polished Basalt (Basalt (Mafic volcanic rock)) — Igneous

Polished Basalt

Basalt (Mafic volcanic rock)

Milk Quartz (White) and Yellow Aventurine (Yellow) (Silicon Dioxide (SiO2)) — mineral

Milk Quartz (White) and Yellow Aventurine (Yellow)

Silicon Dioxide (SiO2)

Quartzite (clastic/metamorphic subtype) (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartzite (clastic/metamorphic subtype)

Quartzite (primarily Silicon Dioxide, SiO2)

Agate (Agate (Microcrystalline Quartz, SiO2)) — mineral

Agate

Agate (Microcrystalline Quartz, SiO2)