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

Agate (Agate (a cryptocrystalline variety of Quartz, SiO₂)) — Mineral

Agate

Agate (a cryptocrystalline variety of Quartz, SiO₂)

Banded Agate (Lace Agate) (Agate (Variety of Cryptocrystalline Quartz), SiO2) — mineral

Banded Agate (Lace Agate)

Agate (Variety of Cryptocrystalline Quartz), SiO2

Blue Lace Agate (Chalcedony (cryptocrystalline variety of Quartz), SiO2) — mineral

Blue Lace Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Banded Agate (specifically Red Agate or Sardonyx variety) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (specifically Red Agate or Sardonyx variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

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

Chalcedony with Quartz

Silicon Dioxide (SiO2)

Quartz pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon Dioxide (SiO2)

Tumbled yellow-orange chalcedony (likely carnelian) (Microcrystalline quartz, SiO₂; iron-bearing variety commonly called carnelian) — mineral

Tumbled yellow-orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; iron-bearing variety commonly called carnelian

Polished/tumbled agate or chalcedony nodule (Microcrystalline quartz (SiO₂), likely agate/chalcedony with weathered outer matrix) — mineral

Polished/tumbled agate or chalcedony nodule

Microcrystalline quartz (SiO₂), likely agate/chalcedony with weathered outer matrix

Jasper (Chalcedony (SiO2)) — mineral

Jasper

Chalcedony (SiO2)

Tumbled yellow chalcedony (Microcrystalline quartz (SiO₂), likely yellow jasper or chalcedony) — mineral

Tumbled yellow chalcedony

Microcrystalline quartz (SiO₂), likely yellow jasper or chalcedony

Tumbled carnelian (red chalcedony) (Carnelian, a microcrystalline variety of quartz; SiO₂, commonly colored by iron oxides) — mineral

Tumbled carnelian (red chalcedony)

Carnelian, a microcrystalline variety of quartz; SiO₂, commonly colored by iron oxides

Polished red jasper and carnelian specimens (Jasper: microcrystalline quartz (SiO₂) colored by iron oxides; carnelian: orange-red chalcedony, also SiO₂) — mineral

Polished red jasper and carnelian specimens

Jasper: microcrystalline quartz (SiO₂) colored by iron oxides; carnelian: orange-red chalcedony, also SiO₂

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — mineral

Petrified Wood

Silicified Wood (SiO2)

Chalcedony (River or Beach Pebbles) (Chalcedony (Silicon Dioxide, SiO2)) — mineral

Chalcedony (River or Beach Pebbles)

Chalcedony (Silicon Dioxide, SiO2)

Mixed River Pebbles and Jasper (Siliciclastic sediment and microcrystalline quartz) — sedimentary

Mixed River Pebbles and Jasper

Siliciclastic sediment and microcrystalline quartz

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

Quartz / Chalcedony

Silicon Dioxide (SiO2)

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

Chert (Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Carnelian (Flame Polished) (Carnelian (SiO2 with Iron Oxide impurities)) — mineral

Carnelian (Flame Polished)

Carnelian (SiO2 with Iron Oxide impurities)

Onyx (Black Onyx) (Silicon Dioxide (SiO2)) — mineral

Onyx (Black Onyx)

Silicon Dioxide (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 (variations include Flint/Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variations include Flint/Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (variations include Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

River Pebble (likely Quartzite or Chert) (Sedimentary Clast (Silicon Dioxide dominant)) — sedimentary

River Pebble (likely Quartzite or Chert)

Sedimentary Clast (Silicon Dioxide dominant)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Polished banded agate (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and clay inclusions) — mineral

Polished banded agate

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and clay inclusions

Tumbled amber-colored chalcedony (likely carnelian or yellow agate) (Microcrystalline quartz, SiO₂; likely iron-bearing chalcedony) — mineral

Tumbled amber-colored chalcedony (likely carnelian or yellow agate)

Microcrystalline quartz, SiO₂; likely iron-bearing chalcedony

Yellow jasper (likely iron-stained chert) (Microcrystalline quartz, SiO₂, colored mainly by iron oxides/hydroxides) — mineral

Yellow jasper (likely iron-stained chert)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides/hydroxides

Agate slice or chalcedony pebble (Microcrystalline quartz (SiO₂), likely botryoidal or banded chalcedony/agate) — mineral

Agate slice or chalcedony pebble

Microcrystalline quartz (SiO₂), likely botryoidal or banded chalcedony/agate

Tumbled brown chalcedony (possibly carnelian or jasper) (Microcrystalline quartz, SiO₂; likely iron-stained chalcedony) — mineral

Tumbled brown chalcedony (possibly carnelian or jasper)

Microcrystalline quartz, SiO₂; likely iron-stained chalcedony

Petrified Wood (Silicified Wood (primarily SiO2)) — mineral

Petrified Wood

Silicified Wood (primarily SiO2)

Tiger’s-eye fragment (Chatoyant quartz, SiO₂, colored by oxidized crocidolite (riebeckite) fibers) — mineral

Tiger’s-eye fragment

Chatoyant quartz, SiO₂, colored by oxidized crocidolite (riebeckite) fibers

Chalcedony (specifically Agate or Carnelian variety) (Cryptocrystalline Silica (SiO2)) — mineral

Chalcedony (specifically Agate or Carnelian variety)

Cryptocrystalline Silica (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled pale green quartz (likely aventurine or common quartz) (Quartz, silicon dioxide (SiO₂); green color may result from fuchsite or chlorite inclusions) — mineral

Tumbled pale green quartz (likely aventurine or common quartz)

Quartz, silicon dioxide (SiO₂); green color may result from fuchsite or chlorite inclusions

Pink chalcedony (likely agate/quartz geode fragment) (Microcrystalline quartz, SiO₂; chalcedony with possible iron-oxide inclusions) — mineral

Pink chalcedony (likely agate/quartz geode fragment)

Microcrystalline quartz, SiO₂; chalcedony with possible iron-oxide inclusions

Polished banded agate (Chalcedony (microcrystalline quartz), SiO₂) — mineral

Polished banded agate

Chalcedony (microcrystalline quartz), SiO₂

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Tumbled carnelian (likely) (Carnelian, a chalcedony variety of microcrystalline quartz (SiO₂), colored mainly by iron oxides) — gemstone

Tumbled carnelian (likely)

Carnelian, a chalcedony variety of microcrystalline quartz (SiO₂), colored mainly by iron oxides

Chalcedony (Blue Dragon/Gray Chalcedony) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (Blue Dragon/Gray Chalcedony)

Silicon Dioxide (SiO₂)

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

Chert (and/or 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)