Rock Identifier

Category

Industrial Byproduct (Often Mistaken For Obsidian Or Mineral)

Browse industrial byproduct (often mistaken for obsidian or mineral) specimens identified by the Rock Identifier community.

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

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

Peridot

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

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

Clear Quartz (Druzy)

Crystalline Silicon Dioxide (SiO2)

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

Milky Quartz with Iron Inclusions

Quartz (Silicon Dioxide, SiO2)

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

Olivine/Peridot

Magnesium Iron Silicate (Mg,Fe)2SiO4

Banded Agate (Chalcedony / Silicon Dioxide (SiO2)) — mineral

Banded Agate

Chalcedony / Silicon Dioxide (SiO2)

Quartz Pebble (Chalcedony/Agate) (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble (Chalcedony/Agate)

Silicon Dioxide (SiO2)

Diamond (Diamond (C)) — mineral

Diamond

Diamond (C)

Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Marble (Metamorphosed Limestone (calcite formulation CaCO3)) — metamorphic

Marble

Metamorphosed Limestone (calcite formulation CaCO3)

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

Agate

Agate (Silicon Dioxide, SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Chert (Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (Jasper variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper variety)

Microcrystalline quartz (SiO2)

Marble (Recrystallized Calcite Rock (CaCO3)) — metamorphic

Marble

Recrystallized Calcite Rock (CaCO3)

Chrysocolla (Chrysocolla, (Cu, Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla

Chrysocolla, (Cu, Al)2H2Si2O5(OH)4·nH2O

Tiger's Eye (variations include Blue or Hawk's Eye) (Silicon Dioxide with Crocidolite inclusions (SiO2)) — Metamorphic mineral

Tiger's Eye (variations include Blue or Hawk's Eye)

Silicon Dioxide with Crocidolite inclusions (SiO2)

Metamorphic mineral

Black Tourmaline (Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Diamond (Diamond (C)) — mineral

Diamond

Diamond (C)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Diamond (Faceted) (Carbon (C)) — mineral

Diamond (Faceted)

Carbon (C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

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

Olivine (Peridot)

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

Parti Sapphire (Corundum (Al2O3)) — mineral

Parti Sapphire

Corundum (Al2O3)

Aquamarine (Pale variety) (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine (Pale variety)

Beryl (Be3Al2Si6O18)

Milky Quartz (Crystal Cluster) (Silicon Dioxide (SiO2) - Quartz Variety) — mineral

Milky Quartz (Crystal Cluster)

Silicon Dioxide (SiO2) - Quartz Variety

Rough Diamond (Pure Carbon (C)) — mineral

Rough Diamond

Pure Carbon (C)

Chalcedony (Agate/Chert variety) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO₂)

Black Tourmaline (Schorl) (Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4) — mineral

Black Tourmaline (Schorl)

Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4

Blue Sapphire (in a faceted jewelry setting) (Corundum (Al2O3) with trace Iron and Titanium) — mineral

Blue Sapphire (in a faceted jewelry setting)

Corundum (Al2O3) with trace Iron and Titanium

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

Ruby

Corundum (Al2O3 with Chromium traces)

Silver (Native Silver) (Native Silver (Ag)) — mineral

Silver (Native Silver)

Native Silver (Ag)

Diamond (Princess Cut Faceted Gemstone) (Native Carbon (C)) — mineral

Diamond (Princess Cut Faceted Gemstone)

Native Carbon (C)

Diamond (Diamond (Pure Carbon, C)) — mineral

Diamond

Diamond (Pure Carbon, C)

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

Peridot

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

Quartz Cobble (with Iron Staining) (Silicon Dioxide (SiO2)) — mineral

Quartz Cobble (with Iron Staining)

Silicon Dioxide (SiO2)

Sandstone (likely Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (likely Quartzose)

Arenite (primarily SiO2)

Granitic Pegmatite (Granite Pegmatite (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Muscovite)) — Igneous

Granitic Pegmatite

Granite Pegmatite (typically containing Quartz SiO2, Feldspar KAlSi3O8, and Muscovite)

Anthracite Coal (Anthracite (Carbon)) — metamorphic

Anthracite Coal

Anthracite (Carbon)