Rock Identifier

Category

Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)

Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.

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

Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Green Jasper with Agate Banding (Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite) — sedimentary (chemical/biological origin)

Green Jasper with Agate Banding

Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite

sedimentary (chemical/biological origin)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Montana Moss Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Montana Moss Agate

Chalcedony (Silicon Dioxide, SiO2)

Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx') (Calcite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx')

Calcite (Calcium Carbonate, CaCO3)

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

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Agate (Moss or Banded Agate variety) (Agate (Silicon Dioxide - SiO2)) — mineral

Agate (Moss or Banded Agate variety)

Agate (Silicon Dioxide - SiO2)

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

Moss Agate

Chalcedony (Silicon Dioxide / SiO2)

Blue Lace Agate (Chalcedony (SiO2) with trace minerals) — mineral

Blue Lace Agate

Chalcedony (SiO2) with trace minerals

Milky Quartz (with potential inclusion) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (with potential inclusion)

Silicon Dioxide (SiO2)

Jasper with Agate Inclusions (Silicon Dioxide (SiO2) - variety of Quartz/Chert) — sedimentary

Jasper with Agate Inclusions

Silicon Dioxide (SiO2) - variety of Quartz/Chert

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

Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Agate with Quartz Druzy (Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline varieties) — mineral

Agate with Quartz Druzy

Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline varieties

Hematite (Iron(III) oxide (Fe2O3)) — Mineral

Hematite

Iron(III) oxide (Fe2O3)

Jasper (Jasper (Silicon Dioxide, SiO2 with iron inclusions)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2 with iron inclusions)

Chert (Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)) — Sedimentary

Chert

Siliceous sedimentary rock (predominantly microcrystalline quartz, SiO2)

Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Jasper

Jasper (Silicon Dioxide, SiO2)

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

Chert (Jasper variation) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

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

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

Banded Agate

Chalcedony / Silicon Dioxide (SiO2)

Chert (containing Flint nodules) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (containing Flint nodules)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Agate (specifically Carnelian Agate or Lake Superior style Agate) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Agate (specifically Carnelian Agate or Lake Superior style Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

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

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Hematite (Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

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

Chalcedony (Grey/White Agate)

Silicon Dioxide (SiO₂)

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

Agate

Silicon Dioxide (SiO2) - Chalcedony variety

Jasper Conglomerate (Puddingstone) (Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)) — sedimentary

Jasper Conglomerate (Puddingstone)

Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)

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

Quartz (Milky/Chalcedony variety)

Silicon Dioxide (SiO2)

Tiger's Eye (Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)) — Mineral

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)

Banded Calcite (often sold as Orange Onyx or Mexican Onyx) (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (often sold as Orange Onyx or Mexican Onyx)

Calcium Carbonate (CaCO3)

Orca Agate (Chalcedony) (Silicon Dioxide (SiO2) with inclusions) — mineral

Orca Agate (Chalcedony)

Silicon Dioxide (SiO2) with inclusions

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

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Tourmalinated Quartz (Silicon Dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)) — mineral

Tourmalinated Quartz

Silicon Dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)

Chert or Flint (polished/water-worn) (Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.) — Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)

Chert or Flint (polished/water-worn)

Chert (a microcrystalline or cryptocrystalline variety of quartz, SiO2). Flint is a specific variety of chert.

Sedimentary (most likely, as Chert is a sedimentary rock often found as nodules in limestone or as bedded deposits; however, it can also form by metasomatic replacement, which leans towards metamorphic processes under certain conditions)

Quartz (likely milky/rose quartz variety) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (likely milky/rose quartz variety)

Quartz (SiO2 - Silicon Dioxide)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Red Jasper (Siltstone or Chert-based Jasper) (Silicon dioxide with hematite (SiO2 + Fe2O3)) — sedimentary

Red Jasper (Siltstone or Chert-based Jasper)

Silicon dioxide with hematite (SiO2 + Fe2O3)

Chalcedony (Common Opal variant or Chert/Flint) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal variant or Chert/Flint)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Chert variety) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Chert variety)

Silicon Dioxide (SiO2)

Red Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Yellow Jasper (Silicon Dioxide with Hydrous Iron Oxide (SiO2 + FeO(OH))) — sedimentary

Yellow Jasper

Silicon Dioxide with Hydrous Iron Oxide (SiO2 + FeO(OH))