Rock Identifier

Category

Mineral (Cryptocrystalline Quartz)

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

Learn about Mineral (Cryptocrystalline Quartz) in the encyclopedia

Lithium Quartz

Dumortierite Quartz

Dumortierite Quartz

Garden Quartz

Blue Quartz

Phantom Quartz

Chalcedony

Black Onyx

Super Seven

Aventurine

Landscape Agate

Landscape Agate

Tube Agate

Prase

Chert (with Iron Staining) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (with Iron Staining)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Carnelian (red-orange chalcedony) (Chalcedony, cryptocrystalline SiO₂; quartz-group mineral) — gemstone

Carnelian (red-orange chalcedony)

Chalcedony, cryptocrystalline SiO₂; quartz-group mineral

Chert (specifically Jasper or Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Jasper or Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Polished yellow chalcedony (likely lemon agate or yellow jasper) (Microcrystalline quartz, SiO₂) — mineral

Polished yellow chalcedony (likely lemon agate or yellow jasper)

Microcrystalline quartz, SiO₂

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

Milky Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

Chrysocolla (Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)) — mineral

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)

Tumbled banded agate (Microcrystalline quartz (chalcedony), SiO₂) — mineral

Tumbled banded agate

Microcrystalline quartz (chalcedony), SiO₂

Chrysoprase (Chalcedony (cryptocrystalline SiO2 variety)) — Mineral

Chrysoprase

Chalcedony (cryptocrystalline SiO2 variety)

Tumbled yellow jasper (Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions) — mineral

Tumbled yellow jasper

Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions

Chert with Quartz Veining (Microcrystalline silica (SiO2)) — sedimentary

Chert with Quartz Veining

Microcrystalline silica (SiO2)

Chalcedony (probably agate or common quartz) (Microcrystalline quartz, SiO₂) — mineral

Chalcedony (probably agate or common quartz)

Microcrystalline quartz, SiO₂

Red Jasper (Skull Carving) (Jasper, a cryptocrystalline variety of Quartz (SiO2)) — sedimentary

Red Jasper (Skull Carving)

Jasper, a cryptocrystalline variety of Quartz (SiO2)

Basalt with Jasper Veining (Basaltic Rock with Cryptocrystalline Quartz (SiO2)) — igneous

Basalt with Jasper Veining

Basaltic Rock with Cryptocrystalline Quartz (SiO2)

Tumbled carnelian and related stones (Carnelian: orange-red chalcedony, microcrystalline SiO₂; the dark central piece may be hematite- or jasper-rich material) — mineral

Tumbled carnelian and related stones

Carnelian: orange-red chalcedony, microcrystalline SiO₂; the dark central piece may be hematite- or jasper-rich material

Chalcedony Nodule (Agate/Chert) (Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)) — mineral

Chalcedony Nodule (Agate/Chert)

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (Green variety) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Green variety)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Flint/Jasper variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint/Jasper variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Polished jasper pebble (Microcrystalline quartz (SiO₂), commonly iron-oxide-bearing chert/jasper) — mineral

Polished jasper pebble

Microcrystalline quartz (SiO₂), commonly iron-oxide-bearing chert/jasper

Polished agate geode slice (Agate, a banded variety of microcrystalline quartz (SiO₂); likely quartz/chalcedony lining a geode) — mineral

Polished agate geode slice

Agate, a banded variety of microcrystalline quartz (SiO₂); likely quartz/chalcedony lining a geode

Tumbled white quartz (likely milky quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled white quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Polished red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Red-brown jasper pebble (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Red-brown jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Tumbled chalcedony (likely yellow agate or citrine-like quartz) (Microcrystalline quartz, SiO₂; yellow coloration may result from iron oxides or inclusions) — mineral

Tumbled chalcedony (likely yellow agate or citrine-like quartz)

Microcrystalline quartz, SiO₂; yellow coloration may result from iron oxides or inclusions

Chert with Manganese Dendrites / River Silt Overlays (Cryptocrystalline Quartz (SiO2) with Manganese Oxides) — sedimentary

Chert with Manganese Dendrites / River Silt Overlays

Cryptocrystalline Quartz (SiO2) with Manganese Oxides

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

Chalcedony (Agate Nodule)

Silicon Dioxide (SiO2)

Green Onyx (Banded Calcite / Travertine) (Calcite (CaCO3) / Travertine / Aragonite) — sedimentary

Green Onyx (Banded Calcite / Travertine)

Calcite (CaCO3) / Travertine / Aragonite

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂), cryptocrystalline to microcrystalline variety) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂), cryptocrystalline to microcrystalline variety

Chert / Quartzite (Silicon Dioxide (SiO2)) — sedimentary

Chert / Quartzite

Silicon Dioxide (SiO2)

Chocolate Jasper (Microcrystalline Quartz (SiO2) with impurities) — sedimentary

Chocolate Jasper

Microcrystalline Quartz (SiO2) with impurities

Picture Jasper (specifically Biggs or Deschutes variety) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — sedimentary

Picture Jasper (specifically Biggs or Deschutes variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Carnelian (Carnelian (SiO2 - Silicon Dioxide with Iron Oxide impurities)) — mineral

Carnelian

Carnelian (SiO2 - Silicon Dioxide with Iron Oxide impurities)

Tumbled brown chalcedony (likely carnelian/colored agate) (Microcrystalline quartz, SiO₂ (chalcedony; iron-bearing varieties are carnelian or brown jasper)) — mineral

Tumbled brown chalcedony (likely carnelian/colored agate)

Microcrystalline quartz, SiO₂ (chalcedony; iron-bearing varieties are carnelian or brown jasper)

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

Grey Chalcedony (Agate)

Silicon Dioxide (SiO2)

Chalcedony Pebble (Silicon Dioxide (SiO2)) — mineral

Chalcedony Pebble

Silicon Dioxide (SiO2)

Lake Superior Agate (Silicon Dioxide (SiO2) with impurities) — mineral

Lake Superior Agate

Silicon Dioxide (SiO2) with impurities

Tumbled chalcedony (likely jasper/chert variety) (Microcrystalline quartz, SiO₂ (chalcedony; opaque varieties commonly called jasper or chert)) — mineral

Tumbled chalcedony (likely jasper/chert variety)

Microcrystalline quartz, SiO₂ (chalcedony; opaque varieties commonly called jasper or chert)

Agate with Druzy Quartz (Silicon Dioxide (SiO2)) — mineral

Agate with Druzy Quartz

Silicon Dioxide (SiO2)

Shiva Lingam (Polished Jasper) (Cryptocrystalline Quartz (SiO2) with Iron Oxide inclusions) — sedimentary

Shiva Lingam (Polished Jasper)

Cryptocrystalline Quartz (SiO2) with Iron Oxide inclusions

Yellow Chalcedony (likely carnelian or yellow agate) (Silicon Dioxide (SiO₂)) — mineral

Yellow Chalcedony (likely carnelian or yellow agate)

Silicon Dioxide (SiO₂)

Red jasper (likely iron-rich chert) (Microcrystalline quartz (SiO₂) colored by hematite/goethite) — sedimentary

Red jasper (likely iron-rich chert)

Microcrystalline quartz (SiO₂) colored by hematite/goethite