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.

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

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Chert (Tripolitic Chert / Flint Nodules) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Tripolitic Chert / Flint Nodules)

Microcrystalline Quartz (SiO2)

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

Quartz (Milky Quartz vein fragment)

Silicon Dioxide (SiO2)

Banded Agate (Tumbled) (Agate (Silicon Dioxide, SiO2 - Cryptocrystalline Quartz)) — mineral

Banded Agate (Tumbled)

Agate (Silicon Dioxide, SiO2 - Cryptocrystalline Quartz)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

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

Smoky Quartz (Tumbled)

Smoky Quartz (Silicon Dioxide - SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Black Sapphire (Corundum (Al2O3 with inclusions of hematite or ilmenite)) — mineral

Black Sapphire

Corundum (Al2O3 with inclusions of hematite or ilmenite)

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

Agate

Chalcedony (Silicon Dioxide, SiO2)

Fluorite (Rainbow Fluorite) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

Red Quartzite (Quartzite (SiO2 with iron oxide impurities)) — metamorphic

Red Quartzite

Quartzite (SiO2 with iron oxide impurities)

Talc (Talc (Mg₃Si₄O₁₀(OH)₂)) — Mineral

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Milky Quartz (Silicon Dioxide (SiO2)) — Mineral

Milky Quartz

Silicon Dioxide (SiO2)

Fluorite (often referred to casually as 'Fluorspar' in industrial contexts) (Fluorite (CaF2)) — Mineral

Fluorite (often referred to casually as 'Fluorspar' in industrial contexts)

Fluorite (CaF2)

Epidote (Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)) — Mineral

Epidote

Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)

N/A - Man-made object (Jewelry Chain) (Antiqued or Oxidized Metal Chain (often Steel or Brass)) — Mineral (processed metal)

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Mineral (processed metal)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Sandstone Moqui Marble (Concretion) (Iron oxide concretion (Hematite/Goethite and Quartz)) — sedimentary

Sandstone Moqui Marble (Concretion)

Iron oxide concretion (Hematite/Goethite and Quartz)

Tektite (Indochinite) (Tektite (High-silica natural glass, primarily SiO2 with Al2O3)) — igneous

Tektite (Indochinite)

Tektite (High-silica natural glass, primarily SiO2 with Al2O3)

Diamond Plate (Steel) (Alloyed Carbon Steel or Aluminum with 'Durbar' pattern) — not a rock (Man-made industrial metal)

Diamond Plate (Steel)

Alloyed Carbon Steel or Aluminum with 'Durbar' pattern

not a rock (Man-made industrial metal)

White Howlite (Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)) — mineral

White Howlite

Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)

Jade (Jadeite/Nephrite) (NaAlSi2O6 (Jadeite) / Ca2(Mg,Fe)5Si8O22(OH)2 (Nephrite)) — metamorphic

Jade (Jadeite/Nephrite)

NaAlSi2O6 (Jadeite) / Ca2(Mg,Fe)5Si8O22(OH)2 (Nephrite)

River/Stream Pebble (Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)) — Mineral, specifically a rock fragment

River/Stream Pebble

Clast / Detrital Grain / Rounded Sedimentary Particle (Compositionally variable, commonly Quartz, Feldspar, Chert, or other resistant rock fragments)

Mineral, specifically a rock fragment

Limonite (Iron Ore) (Limonite (Hydrated iron oxide - FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (Hydrated iron oxide - FeO(OH)·nH2O)

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

Milk Quartz (White) and Yellow Aventurine (Yellow)

Silicon Dioxide (SiO2)

Synthetic Convention Badge (Plastic/PVC) (Polyvinyl Chloride (PVC) / Polycarbonate) — mineraloid (synthetic)

Synthetic Convention Badge (Plastic/PVC)

Polyvinyl Chloride (PVC) / Polycarbonate

mineraloid (synthetic)

Diamond (Cubic carbon (C)) — mineral

Diamond

Cubic carbon (C)

Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz

Silicon Dioxide (SiO2)

Brachiopod Fossil in Limestone (Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)) — sedimentary

Brachiopod Fossil in Limestone

Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)

Chert (and Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Flint)

Silicon Dioxide (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Green glass sphere/marble (Soda-lime glass (primarily SiO2, Na2O, CaO)) — Man-made object (Simulant)

Green glass sphere/marble

Soda-lime glass (primarily SiO2, Na2O, CaO)

Man-made object (Simulant)

Garnet Beads (Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)) — Mineral

Garnet Beads

Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)

Diamond (in jewelry setting) (Adamantine Carbon (C)) — mineral

Diamond (in jewelry setting)

Adamantine Carbon (C)

Limonitic Quartzite (Metamorphosed sandstone with Limonite (FeO(OH)·nH2O) staining) — metamorphic

Limonitic Quartzite

Metamorphosed sandstone with Limonite (FeO(OH)·nH2O) staining

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Olivine (Peridotite/Dunite) (Olivine (Mg,Fe)2SiO4 within Peridotite) — igneous

Olivine (Peridotite/Dunite)

Olivine (Mg,Fe)2SiO4 within Peridotite

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Amethyst (variety of Quartz) (SiO2 (Silicon Dioxide) with trace iron impurities) — Mineral

Amethyst (variety of Quartz)

SiO2 (Silicon Dioxide) with trace iron impurities

The user-provided image does not contain a rock or mineral specimen — N/A

The user-provided image does not contain a rock or mineral specimen

Chert (specifically Blue Chert/Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Blue Chert/Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)