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

Chalcedony Geode Fragment (Botryoidal) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Chalcedony Geode Fragment (Botryoidal)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Red jasper pebble (likely) (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides) — mineral

Red jasper pebble (likely)

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

Blue Chalcedony (Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)) — Mineral

Blue Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz - SiO₂)

Red/orange chalcedony (carnelian), possibly dyed or heat-treated (Chalcedony, cryptocrystalline SiO₂ (quartz variety)) — mineral

Red/orange chalcedony (carnelian), possibly dyed or heat-treated

Chalcedony, cryptocrystalline SiO₂ (quartz variety)

Chert (specifically Jasper/Carnelian variety) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (specifically Jasper/Carnelian variety)

Microcrystalline quartz (SiO2)

Polished carnelian agate (Microcrystalline quartz (SiO₂), chalcedony variety with iron-oxide coloration) — gemstone

Polished carnelian agate

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

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides (Goethite)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Chrysoprase (Silicon dioxide with nickel impurities (SiO2 + Ni)) — mineral

Chrysoprase

Silicon dioxide with nickel impurities (SiO2 + Ni)

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

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Banded Agate (specifically Moss Agate or Plume Agate variety) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Banded Agate (specifically Moss Agate or Plume Agate variety)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Blue Chalcedony (Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Chalcedony (Agate/Chert) (Microcrystalline Quartz (SiO2)) — sedimentary

Chalcedony (Agate/Chert)

Microcrystalline Quartz (SiO2)

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

Chalcedony with Quartz

Silicon Dioxide (SiO2)

Chalcedony (Silicon dioxide (SiO2) - Microcrystalline quartz) — mineral

Chalcedony

Silicon dioxide (SiO2) - Microcrystalline quartz

Red Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Red Jasper

Microcrystalline Quartz (SiO2)

Tree Agate (Dendritic Agate (Silicon Dioxide - SiO2)) — mineral

Tree Agate

Dendritic Agate (Silicon Dioxide - SiO2)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Peach Aventurine (Quartz variety (SiO2 + Hematite/Goethite inclusions)) — mineral

Peach Aventurine

Quartz variety (SiO2 + Hematite/Goethite inclusions)

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

Likely tumbled brown agate (Microcrystalline quartz (SiO₂), a variety of chalcedony) — mineral

Likely tumbled brown agate

Microcrystalline quartz (SiO₂), a variety of chalcedony

Blue Chalcedony (Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Yellow jasper (likely polished/tumbled) (Microcrystalline quartz, SiO₂, colored by iron oxides; exact identification is uncertain from the image) — mineral

Yellow jasper (likely polished/tumbled)

Microcrystalline quartz, SiO₂, colored by iron oxides; exact identification is uncertain from the image

Polished carnelian (red-orange chalcedony) (Carnelian, a cryptocrystalline variety of quartz (SiO₂)) — gemstone

Polished carnelian (red-orange chalcedony)

Carnelian, a cryptocrystalline variety of quartz (SiO₂)

Banded Agate (specifically Lake Superior Agate type) (Silicon Dioxide (SiO2) - variety Chalcedony) — mineral

Banded Agate (specifically Lake Superior Agate type)

Silicon Dioxide (SiO2) - variety Chalcedony

Orange-pink chalcedony (likely carnelian/chalcedony rough) (Microcrystalline quartz, SiO₂; iron-oxide-bearing chalcedony) — mineral

Orange-pink chalcedony (likely carnelian/chalcedony rough)

Microcrystalline quartz, SiO₂; iron-oxide-bearing chalcedony

Red Jasper (with Quartz) (Silicon Dioxide (SiO2) with Hematite inclusions) — mineral

Red Jasper (with Quartz)

Silicon Dioxide (SiO2) with Hematite inclusions

Polished jasper pebble (Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions) — mineral

Polished jasper pebble

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

Botryoidal Chalcedony (Agate) (Cryptocrystalline Quartz (SiO2)) — mineral

Botryoidal Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Agate (Cryptocrystalline quartz, SiO2) — mineral

Agate

Cryptocrystalline quartz, SiO2

Red agate-like polished stone (likely dyed chalcedony) (Chalcedony, microcrystalline SiO₂; possibly dyed quartz or glass imitation) — mineral

Red agate-like polished stone (likely dyed chalcedony)

Chalcedony, microcrystalline SiO₂; possibly dyed quartz or glass imitation

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

Orange-red jasper pebble

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

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

White quartz crystal (likely milky quartz) (Quartz, silicon dioxide (SiO₂); possibly chalcedony if the interior is cryptocrystalline) — mineral

White quartz crystal (likely milky quartz)

Quartz, silicon dioxide (SiO₂); possibly chalcedony if the interior is cryptocrystalline

Tumbled orange chalcedony or carnelian (Cryptocrystalline quartz, SiO₂; likely carnelian variety) — mineral

Tumbled orange chalcedony or carnelian

Cryptocrystalline quartz, SiO₂; likely carnelian variety

Jasper (Silicon Dioxide (SiO2)) — mineral

Jasper

Silicon Dioxide (SiO2)

Dragon Vein Agate (Chalcedony (cryptocrystalline silica, SiO2) variety Agate) — mineral

Dragon Vein Agate

Chalcedony (cryptocrystalline silica, SiO2) variety Agate

Carnelian (Orange chalcedony, microcrystalline quartz (SiO₂)) — mineral

Carnelian

Orange chalcedony, microcrystalline quartz (SiO₂)

Tumbled carnelian (Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)) — gemstone

Tumbled carnelian

Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)

Blue Lace Agate (or similar Chalcedony) (SiO2 (Silicon Dioxide)) — mineral

Blue Lace Agate (or similar Chalcedony)

SiO2 (Silicon Dioxide)

Carnelian (red-orange chalcedony) (Chalcedony, cryptocrystalline SiO₂; quartz-group mineral) — gemstone

Carnelian (red-orange chalcedony)

Chalcedony, cryptocrystalline SiO₂; quartz-group mineral

Red jasper (likely polished/chipped fragment) (Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides) — mineral

Red jasper (likely polished/chipped fragment)

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

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