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

Quartz Vein in Basalt or Mafic Rock (Silicon Dioxide (SiO2) vein in volcanic/mafic matrix) — igneous

Quartz Vein in Basalt or Mafic Rock

Silicon Dioxide (SiO2) vein in volcanic/mafic matrix

Tumbled quartz or chalcedony (uncertain) (Quartz, SiO₂; possibly cryptocrystalline chalcedony) — mineral

Tumbled quartz or chalcedony (uncertain)

Quartz, SiO₂; possibly cryptocrystalline chalcedony

Chalcedony (possibly lavender or gray agate) (Microcrystalline quartz, SiO₂; fibrous quartz aggregate) — mineral

Chalcedony (possibly lavender or gray agate)

Microcrystalline quartz, SiO₂; fibrous quartz aggregate

Small rounded quartz pebble (Quartz (silicon dioxide, SiO₂), possibly milky quartz) — mineral

Small rounded quartz pebble

Quartz (silicon dioxide, SiO₂), possibly milky quartz

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

Quartz (Chert/Chalcedony Variety)

Silicon Dioxide (SiO2)

Banded Chert / Chalcedony (Silicon Dioxide (SiO2)) — sedimentary

Banded Chert / Chalcedony

Silicon Dioxide (SiO2)

Milky quartz (possibly chalcedony) (Quartz, SiO₂; likely massive or cryptocrystalline quartz) — mineral

Milky quartz (possibly chalcedony)

Quartz, SiO₂; likely massive or cryptocrystalline quartz

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

Tumbled agate or chalcedony nodule

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

Polished agate/jasper pebble (probable) (Microcrystalline quartz, SiO₂, with iron-oxide and other inclusions) — mineral

Polished agate/jasper pebble (probable)

Microcrystalline quartz, SiO₂, with iron-oxide and other inclusions

Botryoidal Chalcedony (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Tumbled quartz (Quartz (silicon dioxide, SiO₂), likely milky or included quartz) — mineral

Tumbled quartz

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Tumbled red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides) — mineral

Tumbled red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Chert (Hagstone/Adder Stone) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Hagstone/Adder Stone)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Petrified Coral Fossil (Honeycomb Coral) (Favosites (Rugosa/Tabulate coral fossil replaced by microcrystalline quartz/chalcedony)) — fossil

Petrified Coral Fossil (Honeycomb Coral)

Favosites (Rugosa/Tabulate coral fossil replaced by microcrystalline quartz/chalcedony)

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

Quartz Pebble (Chalcedony / River Pebble)

Silicon Dioxide (SiO2)

Red jasper (possible polished jasper pebble) (Jasper, an opaque variety of microcrystalline quartz (SiO₂)) — mineral

Red jasper (possible polished jasper pebble)

Jasper, an opaque variety of microcrystalline quartz (SiO₂)

Chert (Smooth River Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Pink Mimbres Agate / Plume Agate (Silicon dioxide (SiO2) with mineral inclusions) — gemstone

Pink Mimbres Agate / Plume Agate

Silicon dioxide (SiO2) with mineral inclusions

Carnelian Agate (Silicon Dioxide (SiO2)) — mineral

Carnelian Agate

Silicon Dioxide (SiO2)

Black Onyx (Silicon Dioxide (SiO2)) — mineral

Black Onyx

Silicon Dioxide (SiO2)

Tumbled milky quartz pebble (Quartz (SiO₂), likely cryptocrystalline or massive quartz) — mineral

Tumbled milky quartz pebble

Quartz (SiO₂), likely cryptocrystalline or massive quartz

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

Lake Superior Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

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

Chert (Jasper/Flint variant)

Microcrystalline Quartz (SiO2)

Botryoidal Chalcedony (Agate/Carnelian) (Chalcedony (SiO2)) — mineral

Botryoidal Chalcedony (Agate/Carnelian)

Chalcedony (SiO2)

Tumbled chalcedony (likely moss or plume variety) (Microcrystalline quartz, SiO₂) — mineral

Tumbled chalcedony (likely moss or plume variety)

Microcrystalline quartz, SiO₂

Polished jasper (likely brecciated or orbicular jasper) (Jasper, microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and other mineral inclusions) — mineral

Polished jasper (likely brecciated or orbicular jasper)

Jasper, microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and other mineral inclusions

Red Jasper (or Ironstone Pebble) (SiO2 (Quartz/Microcrystalline Chalcedony with Hematite inclusions)) — sedimentary

Red Jasper (or Ironstone Pebble)

SiO2 (Quartz/Microcrystalline Chalcedony with Hematite inclusions)

Rough chalcedony (likely agate/quartz vein) (Chalcedony, microcrystalline SiO₂; possibly agate with iron-oxide-stained host rock) — mineral

Rough chalcedony (likely agate/quartz vein)

Chalcedony, microcrystalline SiO₂; possibly agate with iron-oxide-stained host rock

White quartz pebble (Quartz (silicon dioxide, SiO₂), likely milky quartz) — mineral

White quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

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

Chalcedony (Common Agate pebble)

Silicon Dioxide (SiO2)

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

Chalcedony (River Agate)

Silicon Dioxide (SiO2)

Yellow Chalcedony (Tumbled/Cabochon) (Silicon dioxide (SiO2)) — mineral

Yellow Chalcedony (Tumbled/Cabochon)

Silicon dioxide (SiO2)

Tumbled agate or chalcedony (Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/agate) — mineral

Tumbled agate or chalcedony

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/agate

Dragon Blood Jasper (SiO2) — mineral

Dragon Blood Jasper

SiO2

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Tumbled brown chalcedony (likely smoky quartz or agate) (Chalcedony, microcrystalline SiO₂; exact variety cannot be confirmed visually) — mineral

Tumbled brown chalcedony (likely smoky quartz or agate)

Chalcedony, microcrystalline SiO₂; exact variety cannot be confirmed visually

Chert with Chalcedony/Quartz Vug (Cryptocrystalline Silica (SiO2)) — sedimentary

Chert with Chalcedony/Quartz Vug

Cryptocrystalline Silica (SiO2)

Agate (SiO2 (Silicon dioxide, cryptocrystalline quartz)) — mineral

Agate

SiO2 (Silicon dioxide, cryptocrystalline quartz)

Quartz (Milky or Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Iron-Stained)

Silicon Dioxide (SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Quartz Veined Jasper (Microcrystalline quartz (SiO2) with calcium carbonate or quartz veins) — sedimentary

Quartz Veined Jasper

Microcrystalline quartz (SiO2) with calcium carbonate or quartz veins