Rock Identifier

Category

Man Made Glass (Not A Natural Rock Or Mineral)

Browse man made glass (not a natural rock or mineral) specimens identified by the Rock Identifier community.

Citrine (Heat-Treated Amethyst) (Silicon Dioxide (SiO2)) — mineral

Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Green Aventurine (Silicon Dioxide (SiO2) with Fuscite inclusions) — mineral

Green Aventurine

Silicon Dioxide (SiO2) with Fuscite inclusions

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Peach Aventurine (Quartz variety (SiO2 + Hematite/Goethite inclusions)) — mineral

Peach Aventurine

Quartz variety (SiO2 + Hematite/Goethite inclusions)

Obsidian (Volcanic glass) — igneous

Obsidian

Volcanic glass

Shale (with Iron Oxide staining) (Fissile Mudstone (primarily Quartz and Clay minerals)) — sedimentary

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Citrine Quartz (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

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

Yellow Quartz or Citrine

Silicon Dioxide (SiO2)

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Crinoid Fossil Stem Segment (Class Crinoidea (Echinodermata)) — sedimentary

Crinoid Fossil Stem Segment

Class Crinoidea (Echinodermata)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Iron Slag (Anthropogenic Vitreous Silicate (Byproduct of Smelting)) — Mineral-like byproduct

Iron Slag

Anthropogenic Vitreous Silicate (Byproduct of Smelting)

Mineral-like byproduct

Quartz (likely tumbled or naturally water-worn) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Sandstone (Stream-rounded Cobble) (Arenite (composed primarily of SiO2, Silica)) — sedimentary

Sandstone (Stream-rounded Cobble)

Arenite (composed primarily of SiO2, Silica)

Granite (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Granite

Phaneritic Felsic Intrusive Igneous Rock

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

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Granitoid (Granite/Granodiorite) (Plutonic igneous rock (variable composition, primarily SiO2)) — igneous

Granitoid (Granite/Granodiorite)

Plutonic igneous rock (variable composition, primarily SiO2)

Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite mica) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Shale (Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)) — sedimentary

Shale

Fissile Mudstone (primarily composed of phyllosilicate minerals like kaolinite, montmorillonite, and illite)

Pink Dyed Agate (Silicon Dioxide (SiO2) with synthetic pigment) — mineral

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Sandstone (Quartzose) (Arenite (predominantly SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (predominantly SiO2)

Green Aventurine (Double-Terminated Wand) (Silicon Dioxide (SiO2) containing Fuchsite (Chromium-rich Muscovite Mica)) — mineral

Green Aventurine (Double-Terminated Wand)

Silicon Dioxide (SiO2) containing Fuchsite (Chromium-rich Muscovite Mica)

Green Aventurine (SiO2 (Silicon Dioxide) with Fuchsite inclusions) — mineral

Green Aventurine

SiO2 (Silicon Dioxide) with Fuchsite inclusions

Green Aventurine (Aventurine Quartz (SiO2 with Fuchsite inclusions)) — mineral

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Amethyst (Tumbled) (Amethyst (Silicon Dioxide, SiO2 + Fe4+)) — mineral

Amethyst (Tumbled)

Amethyst (Silicon Dioxide, SiO2 + Fe4+)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Mahogany Obsidian (Volcanic Glass with Hematite inclusions (SiO2)) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite inclusions (SiO2)

Obsidian (Obsidian (principally SiO2 + MgO, Fe3O4)) — igneous

Obsidian

Obsidian (principally SiO2 + MgO, Fe3O4)

Citrine (Heat-treated or Natural Quartz) (Silicon Dioxide (SiO2)) — mineral

Citrine (Heat-treated or Natural Quartz)

Silicon Dioxide (SiO2)

Quartz (likely) or a Quartzite Pebble (Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.) — Mineral, specifically a detrital grain

Quartz (likely) or a Quartzite Pebble

Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.

Mineral, specifically a detrital grain

Granite (Felsic Intrusive Igneous Rock) — igneous

Granite

Felsic Intrusive Igneous Rock

Carnelian (Chalcedony (cryptocrystalline quartz), SiO2) — Mineral

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

River Quartzite or Chert Pebble (Quartzite (primarily Silicon Dioxide - SiO2)) — metamorphic

River Quartzite or Chert Pebble

Quartzite (primarily Silicon Dioxide - SiO2)

Malaysian 50 Sen Coin (Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)) — Man-made object (coin)

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Man-made object (coin)

Pumice (Pumice (volcanic glass with vesicular texture)) — igneous

Pumice

Pumice (volcanic glass with vesicular texture)

Kimberlite (Kimberlite (Potassic ultramafic volcanic rock)) — igneous

Kimberlite

Kimberlite (Potassic ultramafic volcanic rock)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)