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 jasper, likely picture or brecciated jasper (Microcrystalline quartz (SiO₂) with iron-oxide and other mineral impurities) — gemstone

Tumbled jasper, likely picture or brecciated jasper

Microcrystalline quartz (SiO₂) with iron-oxide and other mineral impurities

Polished botryoidal agate/geode fragment (Microcrystalline quartz (SiO₂), likely chalcedony with druzy quartz) — mineral

Polished botryoidal agate/geode fragment

Microcrystalline quartz (SiO₂), likely chalcedony with druzy quartz

Botryoidal chalcedony (likely blue-gray agate/geode material) (Microcrystalline quartz, SiO₂ (chalcedony, locally amethystine quartz)) — mineral

Botryoidal chalcedony (likely blue-gray agate/geode material)

Microcrystalline quartz, SiO₂ (chalcedony, locally amethystine quartz)

Tumbled jasper (Microcrystalline quartz (SiO₂), commonly iron-oxide-bearing chalcedony) — mineral

Tumbled jasper

Microcrystalline quartz (SiO₂), commonly iron-oxide-bearing chalcedony

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

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

Chert Pebble (Jasper/Flint variant)

Microcrystalline Quartz (SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

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

Polished orbicular jasper (likely ocean jasper)

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and volcanic-mineral inclusions

Yellow Jasper Pebble (Silicon Dioxide (SiO2) with Iron Oxide inclusions) — mineral

Yellow Jasper Pebble

Silicon Dioxide (SiO2) with Iron Oxide inclusions

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

Chert (and Jasper/Flint variant)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Nodule)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Flint Pebbles)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled chalcedony (likely gray/pink chalcedony) (Chalcedony, microcrystalline quartz (SiO₂)) — mineral

Tumbled chalcedony (likely gray/pink chalcedony)

Chalcedony, microcrystalline quartz (SiO₂)

Chert (Flint Nodule) (Microcrystalline and Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Nodule)

Microcrystalline and Cryptocrystalline Quartz (SiO2)

Tumbled yellow jasper (likely silicified/iron-stained chert) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and darker inclusions) — mineral

Tumbled yellow jasper (likely silicified/iron-stained chert)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and darker inclusions

Quartzite (Hydrothermal Quartz or Quartzite (SiO2)) — metamorphic

Quartzite

Hydrothermal Quartz or Quartzite (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Tumbled chalcedony or jasper (Microcrystalline quartz (SiO₂), likely iron-bearing chalcedony/jasper) — mineral

Tumbled chalcedony or jasper

Microcrystalline quartz (SiO₂), likely iron-bearing chalcedony/jasper

Agate (Carnelian Agate with Quartz Matrix) (Silicon Dioxide (SiO2)) — mineral

Agate (Carnelian Agate with Quartz Matrix)

Silicon Dioxide (SiO2)

Chalcedony Pebble with Jasper/Iron Oxide Cortex (Silicon Dioxide (SiO2)) — mineral

Chalcedony Pebble with Jasper/Iron Oxide Cortex

Silicon Dioxide (SiO2)

Poppy Jasper (Microcrystalline Quartz (SiO2) with mineral inclusions) — sedimentary

Poppy Jasper

Microcrystalline Quartz (SiO2) with mineral inclusions

Agated Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Agated Chert

Microcrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (specifically a stream-worn Chert Nodule) (Sedimentary Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (specifically a stream-worn Chert Nodule)

Sedimentary Cryptocrystalline Quartz (SiO2)

Yellow Chalcedony / Carnelian (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony / Carnelian

Silicon Dioxide (SiO2)

Red jasper (polished/cut rough) (Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — metamorphic

Red jasper (polished/cut rough)

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

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Jasper (Microcrystalline Quartz (SiO2)) — mineral

Jasper

Microcrystalline Quartz (SiO2)

Polished banded agate pendant (Agate, microcrystalline quartz (SiO₂), a chalcedony variety) — mineral

Polished banded agate pendant

Agate, microcrystalline quartz (SiO₂), a chalcedony variety

Polished dendritic agate (likely Montana or similar jasper-agate) (Microcrystalline quartz, SiO₂, with iron/manganese dendrites) — mineral

Polished dendritic agate (likely Montana or similar jasper-agate)

Microcrystalline quartz, SiO₂, with iron/manganese dendrites

Tumbled tiger’s-eye (Tiger’s-eye quartz, microcrystalline SiO₂ with fibrous crocidolite pseudomorphs) — mineral

Tumbled tiger’s-eye

Tiger’s-eye quartz, microcrystalline SiO₂ with fibrous crocidolite pseudomorphs

Polished brown jasper pebble (Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides) — mineral

Polished brown jasper pebble

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

Polished red-and-black jasper (Jasper, microcrystalline quartz (SiO₂), colored by iron oxides and other inclusions) — mineral

Polished red-and-black jasper

Jasper, microcrystalline quartz (SiO₂), colored by iron oxides and other inclusions

Orbicular jasper (possibly ocean jasper) (Microcrystalline quartz/chalcedony, SiO₂, with iron-rich and other mineral inclusions) — mineral

Orbicular jasper (possibly ocean jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-rich and other mineral inclusions

Polished banded agate (Agate, microcrystalline quartz (SiO₂), commonly with chalcedony and trace iron oxides) — mineral

Polished banded agate

Agate, microcrystalline quartz (SiO₂), commonly with chalcedony and trace iron oxides

Polished banded agate (likely Botswana agate) (Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide and other mineral bands)) — mineral

Polished banded agate (likely Botswana agate)

Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide and other mineral bands)

Agate (Silicon Dioxide (SiO2)) — sedimentary

Agate

Silicon Dioxide (SiO2)

Yellow jasper (likely polished/tumbled) (Jasper, microcrystalline quartz (SiO₂), commonly colored by iron oxides) — mineral

Yellow jasper (likely polished/tumbled)

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

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Tumbled jasper (likely brecciated or red jasper) (Jasper, microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides) — mineral

Tumbled jasper (likely brecciated or red jasper)

Jasper, microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides

Tumbled chalcedony pebble (Chalcedony, microcrystalline quartz (SiO₂)) — mineral

Tumbled chalcedony pebble

Chalcedony, microcrystalline quartz (SiO₂)

Agate (SiO2 (Silicon Dioxide)) — Mineral

Agate

SiO2 (Silicon Dioxide)