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

Tumbled yellow jasper or iron-stained chert (Microcrystalline quartz (SiO₂), likely colored by iron oxides) — mineral

Tumbled yellow jasper or iron-stained chert

Microcrystalline quartz (SiO₂), likely colored by iron oxides

Yellow chalcedony (likely lemon agate or yellow jasper) (Microcrystalline quartz, SiO₂; possibly iron-bearing jasper or chrysoprase-like chalcedony) — mineral

Yellow chalcedony (likely lemon agate or yellow jasper)

Microcrystalline quartz, SiO₂; possibly iron-bearing jasper or chrysoprase-like chalcedony

Chert / Flint (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert / Flint

Chert (Cryptocrystalline Quartz, SiO2)

Chert (Jasper/Flint variant) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variant)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Banded Agate (Onyx type) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (Onyx type)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Orange-red jasper pebble (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — mineral

Orange-red jasper pebble

Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides

Agate Geode (Cryptocrystalline Quartz (SiO2) with Chalcedony banding) — mineral

Agate Geode

Cryptocrystalline Quartz (SiO2) with Chalcedony banding

Orange chalcedony geode (Microcrystalline quartz (SiO₂), commonly called carnelian or orange agate when strongly colored) — mineral

Orange chalcedony geode

Microcrystalline quartz (SiO₂), commonly called carnelian or orange agate when strongly colored

Small tumbled brown stone, likely iron-stained quartz or jasper (Quartz (SiO₂) or microcrystalline quartz (chalcedony/jasper), identification uncertain from the image) — mineral

Small tumbled brown stone, likely iron-stained quartz or jasper

Quartz (SiO₂) or microcrystalline quartz (chalcedony/jasper), identification uncertain from the image

Tumbled red jasper (Jasper, microcrystalline quartz (SiO₂) colored by iron oxides) — mineral

Tumbled red jasper

Jasper, microcrystalline quartz (SiO₂) colored by iron oxides

Mocha Stone (Dendritic Agate) (Silicon Dioxide (SiO2) with Manganese/Iron inclusions) — sedimentary

Mocha Stone (Dendritic Agate)

Silicon Dioxide (SiO2) with Manganese/Iron inclusions

Chert (often found as Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often found as Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (specifically Flint or Jasper variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert / Flint (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or cryptocrystalline quartz (SiO2)

Honey-colored quartz-rich stone, possibly chert or chalcedony (Microcrystalline silica (SiO₂), identification uncertain from photograph) — mineral

Honey-colored quartz-rich stone, possibly chert or chalcedony

Microcrystalline silica (SiO₂), identification uncertain from photograph

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Honey Calcite (Orange Onyx) (Calcium Carbonate (CaCO3)) — mineral

Honey Calcite (Orange Onyx)

Calcium Carbonate (CaCO3)

Chert (often associated with Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often associated with Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (Flint) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Cryptocrystalline Quartz, SiO2)

Chert (with Limonite staining) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (with Limonite staining)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Polished pink chalcedony/agate slab (Microcrystalline quartz (SiO₂), likely pale pink chalcedony with druzy quartz and possible iron-oxide inclusions) — mineral

Polished pink chalcedony/agate slab

Microcrystalline quartz (SiO₂), likely pale pink chalcedony with druzy quartz and possible iron-oxide inclusions

Agate (Agate (Cryptocrystalline variety of Quartz, SiO2)) — mineral

Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

Petrified Wood Agate (Silicified Wood (primarily SiO2)) — fossil

Petrified Wood Agate

Silicified Wood (primarily SiO2)

Yellow Chalcedony (Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)) — Mineral

Yellow Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)

Tumbled quartz pebble (Quartz (SiO₂), likely milky or iron-stained quartz) — mineral

Tumbled quartz pebble

Quartz (SiO₂), likely milky or iron-stained quartz

Chalcedony Geode Fragment (Botryoidal) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Chalcedony Geode Fragment (Botryoidal)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Chalcedony (Tumbled Pebble) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Tumbled Pebble)

Silicon Dioxide (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Yellow Quartzite (or Yellow Chalcedony Pebble) (Silicon Dioxide (SiO2)) — metamorphic

Yellow Quartzite (or Yellow Chalcedony Pebble)

Silicon Dioxide (SiO2)

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

Chalcedony with Druzy Quartz

Silicon Dioxide (SiO2)

Polychrome Jasper (Desert Jasper) (Silicon dioxide with mineral inclusions (SiO2)) — sedimentary

Polychrome Jasper (Desert Jasper)

Silicon dioxide with mineral inclusions (SiO2)

Yellow chalcedony (likely lemon quartz or citrine) (Cryptocrystalline silica, SiO₂; possible quartz variety) — mineral

Yellow chalcedony (likely lemon quartz or citrine)

Cryptocrystalline silica, SiO₂; possible quartz variety

Limonite with Quartz (FeO(OH)·nH2O (Limonite) with SiO2 (Quartz)) — mineral

Limonite with Quartz

FeO(OH)·nH2O (Limonite) with SiO2 (Quartz)

Botryoidal chalcedony geode (Microcrystalline quartz (SiO₂), commonly with drusy quartz and iron-oxide staining) — mineral

Botryoidal chalcedony geode

Microcrystalline quartz (SiO₂), commonly with drusy quartz and iron-oxide staining

Chert Nodule / Flint (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule / Flint

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Agate (Cryptocrystalline Silicon Dioxide (SiO2)) — mineral

Agate

Cryptocrystalline Silicon Dioxide (SiO2)

Mixed Mineral and Rock Collection (Mixed geological specimens (Quartz, Amethyst, Rose Quartz, Jasper, Epidote, Chert)) — mineral

Mixed Mineral and Rock Collection

Mixed geological specimens (Quartz, Amethyst, Rose Quartz, Jasper, Epidote, Chert)

Tumbled purple jasper (likely) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron and other trace minerals) — mineral

Tumbled purple jasper (likely)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron and other trace minerals

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

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

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)