Rock Identifier

Category

Mineral And Glass

Browse mineral and glass 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

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

Smoky Quartz Cluster

Quartz (Silicon Dioxide) - SiO2

Dream Amethyst (Chevron Amethyst) (Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)) — mineral

Dream Amethyst (Chevron Amethyst)

Silicon Dioxide (SiO2) with impurities of Iron (Fe3+)

Obsidian (Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)) — igneous

Obsidian

Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)

Chert (with Limestone matrix) (Silicon dioxide (SiO2)) — sedimentary

Chert (with Limestone matrix)

Silicon dioxide (SiO2)

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

Sandstone (Quartzose Sandstone)

Arenite (SiO2)

Aquamarine (Beryl (Be₃Al₂Si₆O₁₈)) — mineral

Aquamarine

Beryl (Be₃Al₂Si₆O₁₈)

Slag (Industrial By-product) (Anthropogenic Vitreous Silica/Iron Silicate) — mineral

Slag (Industrial By-product)

Anthropogenic Vitreous Silica/Iron Silicate

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chert (often called Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (often called Flint)

Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Chalcedony (Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Quartz variety)

Silicon Dioxide (SiO2)

Pyrite in Limestone (Iron Sulfide (FeS2) in Calcium Carbonate (CaCO3)) — mineral

Pyrite in Limestone

Iron Sulfide (FeS2) in Calcium Carbonate (CaCO3)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz in Matrix (Silicon Dioxide (SiO2)) — mineral

Milky Quartz in Matrix

Silicon Dioxide (SiO2)

Chalcedony (Smoky Quartz or Agate nodule fragment) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Smoky Quartz or Agate nodule fragment)

Silicon Dioxide (SiO2)

Green Banded Agate (Agate (Variety of Chalcedony/Quartz), SiO2) — mineral

Green Banded Agate

Agate (Variety of Chalcedony/Quartz), SiO2

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

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Smoky Quartz (Smoky Quartz (SiO2)) — mineral

Smoky Quartz

Smoky Quartz (SiO2)

Chalcedony Geode Fragment (Microcrystalline Quartz (SiO2)) — mineral

Chalcedony Geode Fragment

Microcrystalline Quartz (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) with trace Iron (Fe3+)) — mineral

Amethyst

Silicon Dioxide (SiO2) with trace Iron (Fe3+)

Banded Agate (Silicon Dioxide (SiO2) - variety Chalcedony) — mineral

Banded Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Chalcedony (Botryoidal) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz with Epidote or Chlorite inclusions (Silicon Dioxide (SiO2) with inclusions of Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)) — mineral

Milky Quartz with Epidote or Chlorite inclusions

Silicon Dioxide (SiO2) with inclusions of Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Milk Quartz (Vein Quartz) (Quartz (Silicon Dioxide, SiO2)) — mineral

Milk Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Fluorite (Purple Octahedron) (Calcium Fluoride (CaF2)) — Mineral

Fluorite (Purple Octahedron)

Calcium Fluoride (CaF2)

Black Star Diopside (Diopside (CaMgSi2O6) with Magnetite inclusions) — mineral

Black Star Diopside

Diopside (CaMgSi2O6) with Magnetite inclusions

Red aventurine (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — metamorphic

Red aventurine

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Granite (Phaneritic Felsic Igneous Rock) — igneous

Granite

Phaneritic Felsic Igneous Rock

Quartzite (Yellow/Iron-stained Quartz) (Quartzite (primarily SiO2 with iron oxide impurities)) — metamorphic

Quartzite (Yellow/Iron-stained Quartz)

Quartzite (primarily SiO2 with iron oxide impurities)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

White Quartz Pebble

Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral (occurring as a rolled clast)

Quartz Pebble

Silicon Dioxide (SiO2)

Mineral (occurring as a rolled clast)

Quartz (Double-Terminated) (Silicon Dioxide (SiO2)) — mineral

Quartz (Double-Terminated)

Silicon Dioxide (SiO2)