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

Blue Chalcedony Cube (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony Cube

Silicon Dioxide (SiO2)

Tumbled amethyst (likely) (Quartz, SiO₂; purple coloration from irradiation and iron impurities) — mineral

Tumbled amethyst (likely)

Quartz, SiO₂; purple coloration from irradiation and iron impurities

Dyed Agate (Silicon Dioxide (SiO2) with artificial pigment) — sedimentary

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

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

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Red Jasper (Skull Carving) (Jasper, a cryptocrystalline variety of Quartz (SiO2)) — sedimentary

Red Jasper (Skull Carving)

Jasper, a cryptocrystalline variety of Quartz (SiO2)

Basalt with Jasper Veining (Basaltic Rock with Cryptocrystalline Quartz (SiO2)) — igneous

Basalt with Jasper Veining

Basaltic Rock with Cryptocrystalline Quartz (SiO2)

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Lavender Chalcedony (Silicon Dioxide (SiO2)) — mineral

Lavender Chalcedony

Silicon Dioxide (SiO2)

Banded agate (likely chalcedony nodule) (Microcrystalline quartz, SiO₂; fibrous chalcedony with possible quartz bands) — mineral

Banded agate (likely chalcedony nodule)

Microcrystalline quartz, SiO₂; fibrous chalcedony with possible quartz bands

Chrysoprase (Chrysoprase (a variety of Chalcedony, SiO₂)) — Mineral

Chrysoprase

Chrysoprase (a variety of Chalcedony, SiO₂)

Tumbled honey-yellow quartz/chalcedony, possibly dyed (Microcrystalline quartz (SiO₂), likely chalcedony or quartz with iron-oxide coloration) — mineral

Tumbled honey-yellow quartz/chalcedony, possibly dyed

Microcrystalline quartz (SiO₂), likely chalcedony or quartz with iron-oxide coloration

Agate (Polished Slice) (Silicon Dioxide (SiO2)) — mineral

Agate (Polished Slice)

Silicon Dioxide (SiO2)

Petrified Wood (Silicified wood (Quartz/Chalcedony - SiO2)) — sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony - SiO2)

Polished red jasper beads (Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — mineral

Polished red jasper beads

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

Quartz Pebble (Chalcedony/Agate variety) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Chert Nodule (Fossiliferous Chert) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule (Fossiliferous Chert)

Microcrystalline Quartz (SiO2)

Chert / Quartz Pebble (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Quartz Pebble

Cryptocrystalline Quartz (SiO2)

Weathered agate or chalcedony nodule (Microcrystalline quartz (SiO₂), likely agate/chalcedony with iron-oxide staining) — mineral

Weathered agate or chalcedony nodule

Microcrystalline quartz (SiO₂), likely agate/chalcedony with iron-oxide staining

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Polished orbicular jasper (likely ocean jasper) (Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions) — mineral

Polished orbicular jasper (likely ocean jasper)

Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions

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

Banded Flint / Chert

Microcrystalline Quartz (SiO2)

Chert (Common Opal/Agate inclusion) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Common Opal/Agate inclusion)

Microcrystalline Quartz (SiO2)

Chert (Jaspery variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jaspery variety)

Microcrystalline Quartz (SiO2)

Chert (variably called Jasper or Agate) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (variably called Jasper or Agate)

Microcrystalline Quartz (SiO2)

Tumbled blue-green chrysocolla (likely chrysocolla with quartz) (Chrysocolla, hydrated copper aluminum silicate; commonly intergrown with quartz, Cu₂H₂Si₂O₅(OH)₄) — mineral

Tumbled blue-green chrysocolla (likely chrysocolla with quartz)

Chrysocolla, hydrated copper aluminum silicate; commonly intergrown with quartz, Cu₂H₂Si₂O₅(OH)₄

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

Polished Agate (Yellow/Grey Agate Pendant) (Silicon Dioxide (SiO2)) — mineral

Polished Agate (Yellow/Grey Agate Pendant)

Silicon Dioxide (SiO2)

Rhyolitic jasper / brecciated jasper (Silica-rich volcanic rock, chiefly microcrystalline quartz (SiO₂), with iron-oxide and clay/mineral impurities) — igneous

Rhyolitic jasper / brecciated jasper

Silica-rich volcanic rock, chiefly microcrystalline quartz (SiO₂), with iron-oxide and clay/mineral impurities

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Chert (Flint) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Blue chalcedony (likely dyed or coated) (Chalcedony, microcrystalline quartz (SiO₂)) — mineral

Blue chalcedony (likely dyed or coated)

Chalcedony, microcrystalline quartz (SiO₂)

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

Chalcedony (Quartz Nodule)

Silicon Dioxide (SiO2)

Chert (Arrowhead Fragment) (Cryptocrystalline quartz (SiO2)) — sedimentary

Chert (Arrowhead Fragment)

Cryptocrystalline quartz (SiO2)

Geode (Unopened) (Siliceous Septarian Concretion / Geode (SiO2)) — sedimentary

Geode (Unopened)

Siliceous Septarian Concretion / Geode (SiO2)

Quartz (possibly milky quartz) (Quartz (Silica; SiO₂)) — Mineral

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

Agate Geode (Silicon Dioxide (Chalcedony/Quartz), SiO2) — sedimentary

Agate Geode

Silicon Dioxide (Chalcedony/Quartz), SiO2

Pink Dyed Agate (Pink Agate Slice) (Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz) — mineral

Pink Dyed Agate (Pink Agate Slice)

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Green Onyx (Carved Mushroom) (Calcite / Banded Calcite (often commercially sold as 'Mexican Onyx')) — sedimentary

Green Onyx (Carved Mushroom)

Calcite / Banded Calcite (often commercially sold as 'Mexican Onyx')

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)