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 / River Jasper (Silicon Dioxide (SiO2)) — sedimentary

Chert / River Jasper

Silicon Dioxide (SiO2)

Beach Pebble (likely Quartz or Chalcedony) (Silicon Dioxide (SiO2)) — Mineral

Beach Pebble (likely Quartz or Chalcedony)

Silicon Dioxide (SiO2)

Agate (Silicon dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon dioxide (Chalcedony), SiO2

Green Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Green Jasper

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Chert Pebble with Inclusion

Microcrystalline Quartz (SiO2)

Chert Nodules (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodules

Microcrystalline Quartz (SiO2)

Agate Geode (Silicon Dioxide (SiO2) - Chalcedony variety) — sedimentary

Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Tumbled milky quartz (likely chalcedony or quartzite) (Quartz/chalcedony, silicon dioxide (SiO₂)) — mineral

Tumbled milky quartz (likely chalcedony or quartzite)

Quartz/chalcedony, silicon dioxide (SiO₂)

Blue-green chrysocolla rough specimen (Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite) — mineral

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Polished jasper/chalcedony pebble (Microcrystalline quartz (SiO₂), likely brecciated or iron-stained jasper) — mineral

Polished jasper/chalcedony pebble

Microcrystalline quartz (SiO₂), likely brecciated or iron-stained jasper

Jasper (brecciated or orbicular jasper) (Microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides and other impurities) — mineral

Jasper (brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides and other impurities

Tumbled carnelian/chalcedony (Chalcedony (microcrystalline quartz), SiO₂; reddish color from iron oxides) — mineral

Tumbled carnelian/chalcedony

Chalcedony (microcrystalline quartz), SiO₂; reddish color from iron oxides

Brecciated Agate / Jasper (Silicon Dioxide (SiO2) with iron oxide inclusions) — mineral

Brecciated Agate / Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Blue Dyed Agate Geode (Slice) (Silicon Dioxide (SiO2) - Chalcedony / Quartz) — mineral

Blue Dyed Agate Geode (Slice)

Silicon Dioxide (SiO2) - Chalcedony / Quartz

Dyed Agate Geode Slice (Silicon Dioxide (SiO2)) — mineral

Dyed Agate Geode Slice

Silicon Dioxide (SiO2)

Chrysocolla in Matrix (Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O) — mineral

Chrysocolla in Matrix

Hydrated copper silicate - (Cu,Al)2H2Si2O5(OH)4·nH2O

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — mineral

Jasper

Microcrystalline Quartz (SiO2)

Polished agate fragment (Chalcedony (microcrystalline quartz, SiO₂), likely brecciated or banded agate) — mineral

Polished agate fragment

Chalcedony (microcrystalline quartz, SiO₂), likely brecciated or banded agate

Tumbled jasper pebble (Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities) — mineral

Tumbled jasper pebble

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

Likely tumbled brown jasper or iron-rich chert (Microcrystalline quartz (SiO₂), probably colored by iron oxides) — mineral

Likely tumbled brown jasper or iron-rich chert

Microcrystalline quartz (SiO₂), probably colored by iron oxides

Tumbled agate/chalcedony (Microcrystalline quartz (SiO₂), likely brown/orange agate with iron-oxide inclusions) — mineral

Tumbled agate/chalcedony

Microcrystalline quartz (SiO₂), likely brown/orange agate with iron-oxide inclusions

Green Jasper (or Moss Agate / Prase) (Silicon Dioxide (SiO2) with chlorite or amphibole inclusions) — mineral

Green Jasper (or Moss Agate / Prase)

Silicon Dioxide (SiO2) with chlorite or amphibole inclusions

Polished yellow jasper or opaque chalcedony bead (Microcrystalline quartz (SiO₂), likely iron-oxide-stained jasper) — mineral

Polished yellow jasper or opaque chalcedony bead

Microcrystalline quartz (SiO₂), likely iron-oxide-stained jasper

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

Agate (Chalcedony)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (SiO2 - Silicon Dioxide)) — mineral

Petrified Wood

Silicified Wood (SiO2 - Silicon Dioxide)

Chalcedony (specifically Blue Chalcedony or Common Opal variety) (Silicon Dioxide (SiO₂)) — mineral

Chalcedony (specifically Blue Chalcedony or Common Opal variety)

Silicon Dioxide (SiO₂)

Agate (specifically a Banded Agate with a Quartz Druzy center) (Silicon Dioxide (SiO2)) — mineral

Agate (specifically a Banded Agate with a Quartz Druzy center)

Silicon Dioxide (SiO2)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Lake Superior Agate (Silicon Dioxide (SiO2) - Variety Agate) — mineral

Lake Superior Agate

Silicon Dioxide (SiO2) - Variety Agate

Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Carnelian Agate

Silicon Dioxide (SiO2) with Hematite inclusions

Dyed Agate Geode Slice (Silicon Dioxide (SiO2) - Banded Chalcedony) — mineral

Dyed Agate Geode Slice

Silicon Dioxide (SiO2) - Banded Chalcedony

Tumbled jasper or chalcedony (Microcrystalline quartz (SiO₂), probably iron-stained jasper/chalcedony) — mineral

Tumbled jasper or chalcedony

Microcrystalline quartz (SiO₂), probably iron-stained jasper/chalcedony

Lake Superior Agate (SiO2 (Quartz variety chalcedony)) — gemstone

Lake Superior Agate

SiO2 (Quartz variety chalcedony)

Dyed pink agate slice (Agate (microcrystalline quartz, SiO₂), commonly chalcedony with artificial dye) — mineral

Dyed pink agate slice

Agate (microcrystalline quartz, SiO₂), commonly chalcedony with artificial dye

Chert (Flint variety) (Chert (SiO2)) — sedimentary

Chert (Flint variety)

Chert (SiO2)

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

Botryoidal Chalcedony / Agate

Silicon Dioxide (SiO2)

Moss Agate (Silicon Dioxide (Chalcedony variety) with green hornblende or chlorite inclusions - SiO2) — gemstone

Moss Agate

Silicon Dioxide (Chalcedony variety) with green hornblende or chlorite inclusions - SiO2

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

Jasper (Red Jasper)

Silicon Dioxide (SiO2) with iron oxide inclusions