Rock Identifier

Category

Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)

Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.

Learn about Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz) in the encyclopedia

Chalcedony

Blue Chalcedony

Blue Chalcedony

Black Onyx

Prase

Landscape Agate

Landscape Agate

Tube Agate

Carnelian

Feather Agate

Sweetwater Agate

Sweetwater Agate

Honey Agate

Cathedral Agate

Cathedral Agate

Cloud Agate

Polished yellow jasper (Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities) — metamorphic

Polished yellow jasper

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

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

Botryoidal Chalcedony (Cryptocrystalline Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony

Cryptocrystalline Silicon Dioxide (SiO2)

Agate (Cryptocrystalline quartz (SiO2)) — mineral

Agate

Cryptocrystalline quartz (SiO2)

Red-and-brown agate bead bracelet (Agate, a microcrystalline variety of quartz (SiO₂), likely colored chalcedony/carnelian) — mineral

Red-and-brown agate bead bracelet

Agate, a microcrystalline variety of quartz (SiO₂), likely colored chalcedony/carnelian

Carnelian (Carnelian (Cryptocrystalline Quartz, SiO2)) — mineral

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

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

Agate

SiO2 (Silicon dioxide, cryptocrystalline quartz)

Blue chalcedony cabochon (likely dyed) (Microcrystalline quartz, SiO₂ (chalcedony)) — gemstone

Blue chalcedony cabochon (likely dyed)

Microcrystalline quartz, SiO₂ (chalcedony)

Polished brecciated jasper (Jasper, microcrystalline quartz (SiO₂), commonly containing hematite, goethite, and clay minerals) — mineral

Polished brecciated jasper

Jasper, microcrystalline quartz (SiO₂), commonly containing hematite, goethite, and clay minerals

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

Agate

Silicon Dioxide (SiO2) - Chalcedony variant

Red jasper pebble (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — mineral

Red jasper pebble

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

Jasper (Cryptocrystalline Quartz (SiO2)) — sedimentary

Jasper

Cryptocrystalline Quartz (SiO2)

Chert (Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (often called Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert (Chalk-associated Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Chalk-associated Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

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

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Tumbled carnelian agate (Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides) — gemstone

Tumbled carnelian agate

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Tumbled gray chalcedony (likely agate or quartzite) (Microcrystalline quartz, SiO₂ (chalcedony)) — mineral

Tumbled gray chalcedony (likely agate or quartzite)

Microcrystalline quartz, SiO₂ (chalcedony)

Tumbled carnelian (orange chalcedony) (Carnelian, a microcrystalline variety of quartz; silicon dioxide (SiO₂) colored mainly by iron oxides) — mineral

Tumbled carnelian (orange chalcedony)

Carnelian, a microcrystalline variety of quartz; silicon dioxide (SiO₂) colored mainly by iron oxides

Yellow Quartz (SiO2 (Crystalline Silicon Dioxide)) — mineral

Yellow Quartz

SiO2 (Crystalline Silicon Dioxide)

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

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

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

Tumbled chalcedony (likely mossy or iron-stained agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Polished brown jasper (likely ocean or brecciated jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides) — mineral

Polished brown jasper (likely ocean or brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

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

Red Jasper (Brecciated or Mottled)

Silicon Dioxide (SiO2) with iron oxide inclusions

Agate (within host rock) (Agate (Quartz variety SiO2)) — mineral

Agate (within host rock)

Agate (Quartz variety SiO2)

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

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Polished red jasper (Jasper, microcrystalline quartz (SiO₂) colored chiefly by hematite/iron oxides) — mineral

Polished red jasper

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

Red jasper (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — mineral

Red jasper

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

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

Jasper

Chalcedony (cryptocrystalline quartz), SiO2

Quartz Pebbles and Agates (Silicon Dioxide (SiO2)) — mineral

Quartz Pebbles and Agates

Silicon Dioxide (SiO2)

Polished jasper pebble, likely ocean or brecciated jasper (Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides and other impurities) — mineral

Polished jasper pebble, likely ocean or brecciated jasper

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

Polished jasper pebble (Microcrystalline quartz (chalcedony), chiefly SiO₂, with iron-oxide impurities) — mineral

Polished jasper pebble

Microcrystalline quartz (chalcedony), chiefly SiO₂, with iron-oxide impurities

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

Polished moss agate (Moss agate, a microcrystalline quartz variety (SiO₂) with green chlorite/actinolite or iron-manganese inclusions) — gemstone

Polished moss agate

Moss agate, a microcrystalline quartz variety (SiO₂) with green chlorite/actinolite or iron-manganese inclusions

Polished red jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides.) — mineral

Polished red jasper

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

Tumbled carnelian agate (Microcrystalline quartz (chalcedony), SiO₂, colored mainly by iron oxides) — mineral

Tumbled carnelian agate

Microcrystalline quartz (chalcedony), SiO₂, colored mainly by iron oxides

Tumbled red jasper (Microcrystalline quartz (chalcedony), primarily SiO₂, colored by iron oxides) — mineral

Tumbled red jasper

Microcrystalline quartz (chalcedony), primarily SiO₂, colored by iron oxides

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

Tumbled agate, likely carnelian/chalcedony

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

Polished carnelian agate (Microcrystalline quartz, SiO₂, commonly chalcedony with iron-oxide coloring) — mineral

Polished carnelian agate

Microcrystalline quartz, SiO₂, commonly chalcedony with iron-oxide coloring

Tumbled carnelian/chalcedony (Microcrystalline quartz (SiO₂), iron-oxide-stained chalcedony) — mineral

Tumbled carnelian/chalcedony

Microcrystalline quartz (SiO₂), iron-oxide-stained chalcedony

Tumbled amber-colored chalcedony (likely carnelian) (Microcrystalline quartz, SiO₂; orange-red variety commonly termed carnelian) — mineral

Tumbled amber-colored chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; orange-red variety commonly termed carnelian