Rock Identifier

Category

Industrial By Product

Browse industrial by product specimens identified by the Rock Identifier community.

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Banded Chert in Matrix (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert in Matrix

Microcrystalline Quartz (SiO2)

Basalt (Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)) — igneous

Basalt

Basalt (Mafic volcanic rock, primarily Plagioclase and Pyroxene)

Schorl (Black Tourmaline) in Pegmatite (Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)) — igneous

Schorl (Black Tourmaline) in Pegmatite

Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)

Quartz Druse (on Chalcedony/Agate base) (Silicon Dioxide (SiO2)) — mineral

Quartz Druse (on Chalcedony/Agate base)

Silicon Dioxide (SiO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Ruby (Corundum (Al2O3:Cr)) — mineral

Ruby

Corundum (Al2O3:Cr)

Smoky Quartz (SiO2 (Silicon Dioxide)) — mineral

Smoky Quartz

SiO2 (Silicon Dioxide)

Olivine (Peridot) (Magnesium Iron Silicate ((Mg, Fe)2SiO4)) — Mineral

Olivine (Peridot)

Magnesium Iron Silicate ((Mg, Fe)2SiO4)

Quartzite River Cobble (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Cobble

Quartzite (primarily SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Anthracite Coal (Anthracite) — metamorphic

Anthracite Coal

Anthracite

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Granitic Pegmatite (Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)) — igneous

Granitic Pegmatite

Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Mica Schist with Pyrite (Muscovite/Biotite Schist with Iron Sulfide (FeS2)) — metamorphic

Mica Schist with Pyrite

Muscovite/Biotite Schist with Iron Sulfide (FeS2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Ruby (Corundum (Al2O3) with Chromium traces) — mineral

Ruby

Corundum (Al2O3) with Chromium traces

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Quartzite (Quartzite (Primary mineral: Quartz, SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Blue Topaz (specifically London Blue or Swiss Blue based on color saturation) (Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)) — mineral

Blue Topaz (specifically London Blue or Swiss Blue based on color saturation)

Al2SiO4(F,OH)2 (Aluminum Silicate Fluoride Hydroxide)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

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

Chalcedony (Agate Pebble)

Silicon Dioxide (SiO2)

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

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

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Fluorite (Calcium fluoride (CaF2)) — mineral

Fluorite

Calcium fluoride (CaF2)

Satin Spar (commonly sold as Selenite) (Hydrous Calcium Sulfate (CaSO4·2H2O)) — mineral

Satin Spar (commonly sold as Selenite)

Hydrous Calcium Sulfate (CaSO4·2H2O)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Satin Spar (often marketed as Selenite) (Fibrous Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (often marketed as Selenite)

Fibrous Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Milky Quartz with Iron Staining (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Diamond (as set in a metal alloy ring) (Diamond (Pure Carbon, C)) — mineral

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

Garnet (specifically Almandine or Pyrope) (Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)) — mineral

Garnet (specifically Almandine or Pyrope)

Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)

Orange Quartzite (Tumble-polished) (Quartzite (primarily SiO2)) — metamorphic

Orange Quartzite (Tumble-polished)

Quartzite (primarily SiO2)

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

Milky Quartz (river pebble)

Quartz (Silicon Dioxide, SiO2)

Diamond (Princess Cut) (Carbon (C)) — mineral

Diamond (Princess Cut)

Carbon (C)

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

Smoky Quartz

Quartz (Silicon Dioxide) - SiO2

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

Agate

Chalcedony (Silicon Dioxide, SiO2)

Satin Spar (often marketed as Selenite) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (often marketed as Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Agate (Beads) (Silicon Dioxide (SiO2)) — mineral

Agate (Beads)

Silicon Dioxide (SiO2)