Rock Identifier

Category

Mineral (Synthetic Glass)

Browse mineral (synthetic glass) specimens identified by the Rock Identifier community.

Learn about Mineral (Synthetic Glass) in the encyclopedia

Opalite

Porphyritic Obsidian

Porphyritic Obsidian

Gold Sheen Obsidian

Starry Night Obsidian

Fulgurite (Lechatelierite (Silica glass tube)) — mineral

Fulgurite

Lechatelierite (Silica glass tube)

Fulgurite (Lechatelierite (Silica glass tube)) — mineral

Fulgurite

Lechatelierite (Silica glass tube)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky or Druzy Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Druzy Quartz)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Weathered quartz-rich rock, possibly granite or granitic pegmatite (Indeterminate quartz–feldspar aggregate; likely granite/pegmatite) — igneous

Weathered quartz-rich rock, possibly granite or granitic pegmatite

Indeterminate quartz–feldspar aggregate; likely granite/pegmatite

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Obsidian (Black) (Obsidian (High-silica volcanic glass)) — igneous

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Quartz Vein in Sedimentary Matrix (Silicon Dioxide (SiO2) with host rock) — mineral

Quartz Vein in Sedimentary Matrix

Silicon Dioxide (SiO2) with host rock

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Sandstone with Iron Banding (Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)) — sedimentary

Sandstone with Iron Banding

Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Green calcite (likely) (Calcite, calcium carbonate (CaCO₃)) — mineral

Green calcite (likely)

Calcite, calcium carbonate (CaCO₃)

Celestite (Celestine) (Strontium Sulfate (SrSO4)) — mineral

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Lepidolite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Celestite (Celestine) (Strontium Sulfate (SrSO4)) — mineral

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Celestite (Celestine) (Strontium sulfate (SrSO4)) — mineral

Celestite (Celestine)

Strontium sulfate (SrSO4)

Small pale rock fragment (Indeterminate; possibly quartz, calcite, or a weathered feldspar-rich fragment) — mineral

Small pale rock fragment

Indeterminate; possibly quartz, calcite, or a weathered feldspar-rich fragment

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2 with Fe2O3 oxides)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Quartz (Chalcedony/Agate nodule) (Silicon dioxide (SiO2)) — mineral

Quartz (Chalcedony/Agate nodule)

Silicon dioxide (SiO2)

Citrine (Silicon Dioxide (SiO2)) — gemstone

Citrine

Silicon Dioxide (SiO2)

Mahogany Obsidian (Volcanic Glass with Hematite/Magnetite inclusions) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz with Tourmaline (Silicon Dioxide (SiO2) with complex cyclosilicate inclusions) — mineral

Quartz with Tourmaline

Silicon Dioxide (SiO2) with complex cyclosilicate inclusions

Quartz Crystal (Citrine / Golden Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal (Citrine / Golden Quartz)

Silicon Dioxide (SiO2)

Chalcedony (Yellow Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Yellow Agate)

Cryptocrystalline Quartz (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Sandstone (Sedimentary quartz arenite) — sedimentary

Sandstone

Sedimentary quartz arenite

Sandstone (Ferruginous) (Arenite (Fe-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich)

Sandstone with Iron Oxide Staining (Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone with Iron Oxide Staining

Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)

Spherulitic Rhyolite / Leopard Skin Rhyolite (Extrusive felsic igneous rock with spherulites) — igneous

Spherulitic Rhyolite / Leopard Skin Rhyolite

Extrusive felsic igneous rock with spherulites

Granite / Quartz Vein Rock (Granitoid with Quartz (SiO2)) — igneous

Granite / Quartz Vein Rock

Granitoid with Quartz (SiO2)

Pyrite-bearing quartz vein rock (Pyrite (FeS₂) in quartz, possibly with iron-oxide weathering products) — mineral

Pyrite-bearing quartz vein rock

Pyrite (FeS₂) in quartz, possibly with iron-oxide weathering products

Celestite (Strontium Sulfate (SrSO4)) — mineral

Celestite

Strontium Sulfate (SrSO4)

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

Fluorite (Purple Octahedron)

Calcium Fluoride (CaF2)