Rock Identifier

Category

Sedimentary (Secondary Classification: Cryptocrystalline Quartz)

Browse sedimentary (secondary classification: cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Yellow Chert (Sedimentary cryptocrystalline quartz (SiO2)) — sedimentary

Yellow Chert

Sedimentary cryptocrystalline quartz (SiO2)

Chert (specifically Yellow Jasper) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Yellow Jasper)

Sedimentary Cryptocrystalline Quartz (SiO2)

Chert Nodule (with Flint core) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert Nodule (with Flint core)

Sedimentary Cryptocrystalline Quartz (SiO2)

Fancy Jasper (Silicon Dioxide (SiO₂)) — sedimentary

Fancy Jasper

Silicon Dioxide (SiO₂)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides (Goethite)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Ferruginous Quartz (Carnelian-tinted Quartz) (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Ferruginous Quartz (Carnelian-tinted Quartz)

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Limonite (Iron Ore) (Hydrous ferric oxides (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Hydrous ferric oxides (FeO(OH)·nH2O)

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

Carnelian

Carnelian (Silicon Dioxide: SiO2 with Iron Oxide impurities)

Yellow Quartz (Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Chalcedony)

Silicon Dioxide (SiO2)

Agate (specifically a Yellow/Honey Agate) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Agate (specifically a Yellow/Honey Agate)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartz Geode Fragment (Silicon Dioxide (SiO2)) — mineral

Quartz Geode Fragment

Silicon Dioxide (SiO2)

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

Banded Agate

Chalcedony (Silicon Dioxide, SiO2)

Chalcedony or Chert/Jasper with secondary mineral staining (SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.) — Mineral, potentially a rock with chalcedony/jasper.

Chalcedony or Chert/Jasper with secondary mineral staining

SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.

Mineral, potentially a rock with chalcedony/jasper.

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

Chert (Jasper variation)

Microcrystalline Quartz (SiO2)

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

Chert Pebble with Quartz Veining

Microcrystalline Quartz (SiO2)

Jasper (likely Polychrome or Mookaite variants) (Silicon Dioxide (SiO2) with iron oxide and hydroxide inclusions) — sedimentary (chemically precipitated)

Jasper (likely Polychrome or Mookaite variants)

Silicon Dioxide (SiO2) with iron oxide and hydroxide inclusions

sedimentary (chemically precipitated)

Botryoidal Chalcedony (Chalcedony (SiO2)) — Mineral

Botryoidal Chalcedony

Chalcedony (SiO2)

Quartz Geode (Quartz (Silicon Dioxide, SiO2) Geode) — sedimentary

Quartz Geode

Quartz (Silicon Dioxide, SiO2) Geode

Yellow Quartzite (or Quartz River Pebble) (Silicon Dioxide (SiO2)) — metamorphic

Yellow Quartzite (or Quartz River Pebble)

Silicon Dioxide (SiO2)

Chert (Jasper/Agate variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Microcrystalline quartz (SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Red Jasper with Quartz veins (Jasper (Silicon Dioxide, SiO2) with macrocrystalline Quartz veins) — sedimentary

Red Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2) with macrocrystalline Quartz veins

Ferruginous Quartz (Iron-stained Quartz) (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — mineral

Ferruginous Quartz (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

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

Geode (Quartz)

Silicon Dioxide (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Green Aventurine (Green Quartzite) (Silicon Dioxide (SiO2) with inclusions of Fuchsite mica) — metamorphic

Green Aventurine (Green Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Banded Chert (Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert (Jasper)

Silicon Dioxide (SiO2)

Banded Chert (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert

Silicon Dioxide (SiO2)

Yellow Quartz (Iron-stained Quartz) (Quartz (Silicon Dioxide, SiO2) with Hematite/Limonite impurities) — mineral

Yellow Quartz (Iron-stained Quartz)

Quartz (Silicon Dioxide, SiO2) with Hematite/Limonite impurities

Chalcedony in Matrix (Silicon Dioxide (SiO2)) — mineral

Chalcedony in Matrix

Silicon Dioxide (SiO2)

Chert (specifically Jasper or Brown Chert node) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Jasper or Brown Chert node)

Microcrystalline Quartz (SiO2)

Dyed Chalcedony (Agate) (Silicon Dioxide (SiO2) with artificial pigment) — mineral

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Jasper with Quartz inclusions (Silicon Dioxide (SiO2) - Microcrystalline Chalcedony) — sedimentary

Jasper with Quartz inclusions

Silicon Dioxide (SiO2) - Microcrystalline Chalcedony

Quartz Geode (Silicon Dioxide (SiO2) within a secondary sedimentary structure) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Quartz Geode (Silicon Dioxide (SiO2) within a secondary sedimentary structure) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2) within a secondary sedimentary structure

Chert (Jasper/Flint variant) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Quartz Geode (Cracked Open Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz Geode (Cracked Open Fragment)

Silicon Dioxide (SiO2)

Jasper with Quartz Veining (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Turquoise (Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O