Rock Identifier

Category

Mineral (Cryptocrystalline Quartz)

Browse mineral (cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Chert (Septarian Concretion/Nodule) (Microcrystalline silica (SiO2) with carbonate mineral veining) — sedimentary

Chert (Septarian Concretion/Nodule)

Microcrystalline silica (SiO2) with carbonate mineral veining

Quartzite with Iron Hydroxide Staining (Quartzite (primarily SiO2) with Limonite/Goethite staining) — metamorphic

Quartzite with Iron Hydroxide Staining

Quartzite (primarily SiO2) with Limonite/Goethite staining

Quartzite (Quartzite (Primary mineral: SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: SiO2)

Quartz (specifically Quartzite or Massive Quartz) (Silicon Dioxide (SiO2)) — Mineral

Quartz (specifically Quartzite or Massive Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Green Aventurine in Host Rock (SiO2 (Quartz with Fuchsite inclusions)) — mineral

Green Aventurine in Host Rock

SiO2 (Quartz with Fuchsite inclusions)

Tiger's Eye (Silicon dioxide (SiO2) with fibrous inclusions of crocidolite (riebeckite) that have been altered to limonite and then replaced by quartz) — Mineral

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite (riebeckite) that have been altered to limonite and then replaced by quartz

Quartzite with Garnet (Garnetiferous Quartzite (SiO2 + X3Y2(SiO4)3)) — metamorphic

Quartzite with Garnet

Garnetiferous Quartzite (SiO2 + X3Y2(SiO4)3)

Quartzite with Quartz Vein (Metamorphosed Quartz-rich Arenite (SiO2)) — metamorphic

Quartzite with Quartz Vein

Metamorphosed Quartz-rich Arenite (SiO2)

Red Quartzite (Quartzite (primarily SiO2 with trace Fe2O3)) — metamorphic

Red Quartzite

Quartzite (primarily SiO2 with trace Fe2O3)

Granite (Intrusive Felsic Igneous Rock) — igneous

Granite

Intrusive Felsic Igneous Rock

Granite (Phaneritic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Igneous Rock (Granite)

Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Turquoise (Turquoise - CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Banded Gneiss (Gneiss (pronounced "nice")) — metamorphic

Banded Gneiss

Gneiss (pronounced "nice")

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

River Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Granite (Granite) — igneous

Granite

Granite

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)

Dalmatian Stone (Peralkaline rhyolite) — igneous

Dalmatian Stone

Peralkaline rhyolite

Banded Flint (Polished Stripe Flint) (Silicon Dioxide (SiO2) - variety of Chert) — sedimentary

Banded Flint (Polished Stripe Flint)

Silicon Dioxide (SiO2) - variety of Chert

Gold in Matrix (Native Gold (Au)) — mineral

Gold in Matrix

Native Gold (Au)

Chert Concretion (with typical hematite/limonite staining) (Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)) — sedimentary

Chert Concretion (with typical hematite/limonite staining)

Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)

Blue Quartzite (Aventurine) (Silicon Dioxide (SiO2) with mineral inclusions) — metamorphic

Blue Quartzite (Aventurine)

Silicon Dioxide (SiO2) with mineral inclusions

Quartzite Pebble (with Iron Inclusions) (Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)) — metamorphic

Quartzite Pebble (with Iron Inclusions)

Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)

Lazulite (Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2) — mineral

Lazulite

Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2

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

Chert (Flint)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Pink Tourmaline in Quartz Matrix (Elbaite (Na(Li,Al)3Al6(Si6O18)(BO3)3(OH)4) in Quartz (SiO2)) — mineral

Pink Tourmaline in Quartz Matrix

Elbaite (Na(Li,Al)3Al6(Si6O18)(BO3)3(OH)4) in Quartz (SiO2)

Quartz / Quartzite (Silicon Dioxide (SiO2)) — mineral / metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

mineral / metamorphic

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Red Granite (Phaneritic Felsic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Red Granite

Phaneritic Felsic Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Granite (Phaneritic Plutonic Felsic Rock (KAlSi3O8 - SiO2 - NaAlSi3O8)) — igneous

Granite

Phaneritic Plutonic Felsic Rock (KAlSi3O8 - SiO2 - NaAlSi3O8)

Fancy Jasper (Bloodstone variety) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Fancy Jasper (Bloodstone variety)

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Banded Agate (Carnelian type) (Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony) — mineral

Banded Agate (Carnelian type)

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Banded Agate (specifically Lake Superior Agate) (Silicon dioxide (SiO2) - Cryptocrystalline Chalcedony) — mineral

Banded Agate (specifically Lake Superior Agate)

Silicon dioxide (SiO2) - Cryptocrystalline Chalcedony

Black Onyx (Silicon Dioxide (SiO2) with cryptocrystalline structure) — mineral

Black Onyx

Silicon Dioxide (SiO2) with cryptocrystalline structure

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartz (Smoky/Milky Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky Variety)

Silicon Dioxide (SiO2)

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

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)