Rock Identifier

Category

Mineral (Synthetic Glass)

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

Quartz (Milky or Cloudy variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Clear Quartz Fragment (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz Fragment

Quartz (Silicon Dioxide, SiO2)

mineral
Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral
Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

mineral
Sandstone with Secondary Mineral Encrustation (Arenite with Silica/Calcite deposits (SiO2 or CaCO3)) — sedimentary

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

sedimentary
Quartz (Silicon Dioxide (SiO2)) — Mineral

Quartz

Silicon Dioxide (SiO2)

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

Chert (often called Flint)

Silicon Dioxide (SiO2)

sedimentary
Quartz / Chert (Silicon Dioxide (SiO2)) — Mineral / Sedimentary

Quartz / Chert

Silicon Dioxide (SiO2)

Mineral / Sedimentary
Milky Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

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

Citrine

Silicon Dioxide (SiO2) with iron impurities

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

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

mineral
Sandstone (Arenite) — sedimentary

Sandstone

Arenite

sedimentary
Sandstone (Weathered Cobble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Weathered Cobble)

Clastic sedimentary rock (primarily SiO2)

sedimentary
Chert (Red Jasper variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Red Jasper variant)

Microcrystalline Quartz (SiO2)

sedimentary
Sandstone (Quartzite-rich) (Clastic sedimentary rock (SiO2 primary)) — sedimentary

Sandstone (Quartzite-rich)

Clastic sedimentary rock (SiO2 primary)

sedimentary
Quartz Geode/Druzy Quartz (Quartz (SiO₂)) — Mineral

Quartz Geode/Druzy Quartz

Quartz (SiO₂)

Mineral
Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

metamorphic
Amethyst (Chevron or Banded Amethyst) (Silicon Dioxide (SiO2) with Fe3+ impurities) — mineral

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with Fe3+ impurities

mineral
Moldavite (Moldavite (Siliceous vitreous substance)) — tektite (natural glass)

Moldavite

Moldavite (Siliceous vitreous substance)

tektite (natural glass)
Chert (Iron-stained) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Quartz (specifically Milky/Gray Quartz vein) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Milky/Gray Quartz vein)

Silicon Dioxide (SiO2)

mineral
Dragon Blood Jasper (Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Dragon Blood Jasper

Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

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

Sandstone (Ferruginous)

Arenite (Fe-rich)

sedimentary
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary
Sandstone (Arenite (primarily Quartz, SiO2)) — sedimentary

Sandstone

Arenite (primarily Quartz, SiO2)

sedimentary
Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

mineral
Smoky Quartz (Smoky Quartz (SiO2)) — mineral

Smoky Quartz

Smoky Quartz (SiO2)

mineral
Chalcedony in Limestone Host Rock (Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)) — Mineral within Sedimentary Rock

Chalcedony in Limestone Host Rock

Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)

Mineral within Sedimentary Rock
Dendritic Agate or Manganese Nodule in Chert/Limestone (Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions) — sedimentary

Dendritic Agate or Manganese Nodule in Chert/Limestone

Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions

sedimentary
Quartz (Water-worn Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary
Sandstone (likely Arkosic or Quartzose) (Arenite (SiO2 based with mineral inclusions)) — sedimentary

Sandstone (likely Arkosic or Quartzose)

Arenite (SiO2 based with mineral inclusions)

sedimentary
Quartz (likely Herkimer Diamond style) (Silicon Dioxide (SiO2)) — mineral

Quartz (likely Herkimer Diamond style)

Silicon Dioxide (SiO2)

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

Smoky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Sandstone (likely Red/Brown Sandstone) (Arenite (SiO2 based)) — sedimentary

Sandstone (likely Red/Brown Sandstone)

Arenite (SiO2 based)

sedimentary
Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

sedimentary
Quartzite with Quartz Vein (Quartzite (SiO2)) — metamorphic

Quartzite with Quartz Vein

Quartzite (SiO2)

metamorphic
Granitic Quartz (with Feldspar inclusions) (Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)) — igneous

Granitic Quartz (with Feldspar inclusions)

Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)

igneous