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 yellow chalcedony (probable) (Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper) — mineral

Tumbled yellow chalcedony (probable)

Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper

Quartz (likely a form of massive or vein quartz) (Quartz (SiO₂)) — Mineral

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Quartz Vein in Basalt or Slate (Hydrothermal quartz vein traversing mafic host rock) — metamorphic

Quartz Vein in Basalt or Slate

Hydrothermal quartz vein traversing mafic host rock

Tumbled red/orange jasper (Jasper, microcrystalline quartz (chalcedony; SiO₂) with iron-oxide impurities) — mineral

Tumbled red/orange jasper

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

Polished blue lace agate slice (Chalcedony (microcrystalline quartz), SiO₂, commonly with blue-gray banding and a druzy quartz center) — mineral

Polished blue lace agate slice

Chalcedony (microcrystalline quartz), SiO₂, commonly with blue-gray banding and a druzy quartz center

Quartz Vein in Basalt or Porphyry (Silicate-veined volcanic rock) — igneous

Quartz Vein in Basalt or Porphyry

Silicate-veined volcanic rock

Chert (Iron-stained) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert with Quartz Vein (Microcrystalline Quartz (SiO2) with Macrocrystalline Quartz) — sedimentary

Chert with Quartz Vein

Microcrystalline Quartz (SiO2) with Macrocrystalline Quartz

Blue Lace Agate (Cryptocrystalline Quartz (SiO2) with trace minerals) — sedimentary

Blue Lace Agate

Cryptocrystalline Quartz (SiO2) with trace minerals

Polished smoky quartz or brown chalcedony pebble (Silicon dioxide (SiO₂), likely quartz/chalcedony with iron-oxide inclusions) — mineral

Polished smoky quartz or brown chalcedony pebble

Silicon dioxide (SiO₂), likely quartz/chalcedony with iron-oxide inclusions

Blue Chalcedony (Silicon dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon dioxide (SiO2)

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O) — mineral

Chrysocolla

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

Chalcedony geode or quartz-rich agate nodule (Microcrystalline quartz, SiO₂, with possible crystalline quartz druse) — mineral

Chalcedony geode or quartz-rich agate nodule

Microcrystalline quartz, SiO₂, with possible crystalline quartz druse

Carnelian Agate (Silicon dioxide (SiO2) with iron impurities) — mineral

Carnelian Agate

Silicon dioxide (SiO2) with iron impurities

Chalcedony (Common Opal variant or Chert/Flint) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal variant or Chert/Flint)

Silicon Dioxide (SiO2)

Chalcedony (Common Opal variant or Quartz) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Common Opal variant or Quartz)

Silicon Dioxide (SiO2)

Tumbled milky quartz (Quartz (SiO₂), cryptocrystalline to coarse-grained quartz aggregate) — mineral

Tumbled milky quartz

Quartz (SiO₂), cryptocrystalline to coarse-grained quartz aggregate

Carnelian (Chalcedony (SiO2)) — mineral

Carnelian

Chalcedony (SiO2)

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

Agate and Chalcedony Assortment

Silicon Dioxide (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2)) — mineral

Carnelian Agate

Silicon Dioxide (SiO2)

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

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Quartz with Chalcedony

Silicon dioxide (SiO2)

Polished Mexican “Crazy Lace” agate tower (Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions) — mineral

Polished Mexican “Crazy Lace” agate tower

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

Jasper (Jasper (Cryptocrystalline Quartz, SiO2)) — sedimentary

Jasper

Jasper (Cryptocrystalline Quartz, SiO2)

Tumbled jasper or quartz-rich chert (Microcrystalline quartz (SiO₂), likely jasper/chert with iron-oxide staining) — mineral

Tumbled jasper or quartz-rich chert

Microcrystalline quartz (SiO₂), likely jasper/chert with iron-oxide staining

Tumbled chalcedony (likely moss or dendritic agate) (Microcrystalline quartz, SiO₂, with iron-oxide inclusions) — mineral

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

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

Chert (Siliceous Pebble)

Microcrystalline / Cryptocrystalline Quartz (SiO2)

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

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Jasper / Agate with Petrified Wood Inclusion (SiO2) — mineral

Jasper / Agate with Petrified Wood Inclusion

SiO2

Geode (Quartz / Chalcedony nodule) — sedimentary

Geode

Quartz / Chalcedony nodule

Polished reddish-brown gemstone, likely carnelian (Carnelian: chalcedony, microcrystalline quartz (SiO₂), colored mainly by iron oxides) — gemstone

Polished reddish-brown gemstone, likely carnelian

Carnelian: chalcedony, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Bloodstone / Heliotrope (Cryptocrystalline Quartz (SiO2 with inclusions)) — sedimentary

Bloodstone / Heliotrope

Cryptocrystalline Quartz (SiO2 with inclusions)

Agate (SiO2) — Mineral

Agate

SiO2

Polished blue-green agate slice (Agate, a banded microcrystalline variety of chalcedony (SiO₂), commonly colored by trace minerals) — mineral

Polished blue-green agate slice

Agate, a banded microcrystalline variety of chalcedony (SiO₂), commonly colored by trace minerals

Carnelian (Carnelian (Chalcedony/Quartz, SiO2)) — mineral

Carnelian

Carnelian (Chalcedony/Quartz, SiO2)

Leopardite (Quartz porphyry / Quartz monzonite with manganese oxide spots) — igneous

Leopardite

Quartz porphyry / Quartz monzonite with manganese oxide spots

Brown agate (chalcedony) (Microcrystalline quartz, SiO₂; likely iron-stained chalcedony) — mineral

Brown agate (chalcedony)

Microcrystalline quartz, SiO₂; likely iron-stained chalcedony

Yellow Quartz (Citrine Quartz / Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz / Milky Quartz)

Silicon Dioxide (SiO2)

Tumbled yellow chalcedony (likely honey quartz or pale citrine) (Microcrystalline quartz, SiO₂; exact identity cannot be confirmed visually) — mineral

Tumbled yellow chalcedony (likely honey quartz or pale citrine)

Microcrystalline quartz, SiO₂; exact identity cannot be confirmed visually

Brown chert or jasper pebble (Microcrystalline quartz (SiO₂), likely iron-oxide-bearing chert/jasper) — sedimentary

Brown chert or jasper pebble

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

Mixed Tumbled Rocks and Minerals Collection (Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)) — mineral

Mixed Tumbled Rocks and Minerals Collection

Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)

Jasper (Chalcedony (cryptocrystalline quartz), SiO2) — Sedimentary

Jasper

Chalcedony (cryptocrystalline quartz), SiO2