Rock Identifier

Category

Sedimentary Rock (Technically A Variety Of Chalcedony)

Browse sedimentary rock (technically a variety of chalcedony) specimens identified by the Rock Identifier community.

Learn about Sedimentary Rock (Technically A Variety Of Chalcedony) in the encyclopedia

Blue Chalcedony

Blue Chalcedony

Asphalt Rock

Rock Gypsum

Conglomerate

Breccia

Ironstone

Limestone

Syenite

Agate

Kentucky Agate

Shadow Agate

Chrysoprase

Jasper (Multi-color Chert) (Silicon dioxide (SiO2)) — sedimentary

Jasper (Multi-color Chert)

Silicon dioxide (SiO2)

Yellow Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Yellow Jasper

Microcrystalline Quartz (SiO2)

Polished banded agate (likely carnelian agate) (Microcrystalline quartz, SiO₂ (chalcedony); iron-oxide coloring) — mineral

Polished banded agate (likely carnelian agate)

Microcrystalline quartz, SiO₂ (chalcedony); iron-oxide coloring

Jasper (Cryptocrystalline Quartz (SiO2)) — sedimentary

Jasper

Cryptocrystalline Quartz (SiO2)

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

Tumbled carnelian agate

Cryptocrystalline quartz (SiO₂), chalcedony variety colored by iron oxides

Red Jasper (Silicon Dioxide (SiO2) with Hematite impurities) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Agate Slab (Chalcedony (SiO2)) — mineral

Agate Slab

Chalcedony (SiO2)

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

Tumbled Agate (Silicon Dioxide (SiO2)) — sedimentary

Tumbled Agate

Silicon Dioxide (SiO2)

Ocean Jasper (Orbicular Jasper) (Silicon Dioxide (SiO2) with iron and other impurities) — sedimentary

Ocean Jasper (Orbicular Jasper)

Silicon Dioxide (SiO2) with iron and other impurities

Tumbled chalcedony/agate (likely iron-stained quartz) (Microcrystalline quartz, SiO₂; chalcedony with possible agate banding and iron-oxide inclusions) — mineral

Tumbled chalcedony/agate (likely iron-stained quartz)

Microcrystalline quartz, SiO₂; chalcedony with possible agate banding and iron-oxide inclusions

Jasper (Jasper (SiO2)) — sedimentary

Jasper

Jasper (SiO2)

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

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Yellow Jasper (Iron-stained Quartzite/Chert) (Silicon Dioxide (SiO2) with Hydrated Iron Oxide (Goehite/Limonite) inclusions) — sedimentary

Yellow Jasper (Iron-stained Quartzite/Chert)

Silicon Dioxide (SiO2) with Hydrated Iron Oxide (Goehite/Limonite) inclusions

Jasper (Red Jasper) (Silicon Dioxide (SiO₂)) — sedimentary

Jasper (Red Jasper)

Silicon Dioxide (SiO₂)

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

Jasper pebble

Silicon Dioxide (SiO2 with iron oxide inclusions)

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

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Jasper (Jasper (Silica/Quartz) - SiO2) — sedimentary

Jasper

Jasper (Silica/Quartz) - SiO2

Banded Agate Coaster (Silicon Dioxide (SiO2) - Variety Agate / Chalcedony) — mineral

Banded Agate Coaster

Silicon Dioxide (SiO2) - Variety Agate / Chalcedony

Jasper with Hematite inclusions (Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)) — sedimentary

Jasper with Hematite inclusions

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Agate (Silicon Dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon Dioxide (Chalcedony), SiO2

Dyed agate (likely dyed chalcedony) (Microcrystalline quartz, SiO₂ (chalcedony/agate)) — gemstone

Dyed agate (likely dyed chalcedony)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Polished chalcedony with iron-oxide cap (probable carnelian/agate) (Microcrystalline quartz, SiO₂, with hematite/goethite inclusions) — mineral

Polished chalcedony with iron-oxide cap (probable carnelian/agate)

Microcrystalline quartz, SiO₂, with hematite/goethite inclusions

Tumbled agate and chalcedony specimens (Microcrystalline quartz (SiO₂), chiefly chalcedony/agate) — mineral

Tumbled agate and chalcedony specimens

Microcrystalline quartz (SiO₂), chiefly chalcedony/agate

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Chert (Jasper/Chalcedony variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Chalcedony variety)

Microcrystalline Quartz (SiO2)

Jasper (specifically Brecciated or Agated Jasper) (Silicon Dioxide (SiO2) - Chalcedony with impurities) — Mineral / Sedimentary

Jasper (specifically Brecciated or Agated Jasper)

Silicon Dioxide (SiO2) - Chalcedony with impurities

Mineral / Sedimentary

Polished brown jasper (Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich variety) — mineral

Polished brown jasper

Jasper (microcrystalline quartz, SiO₂), likely iron-oxide-rich variety

Tumbled agate (likely banded/chalcedony agate) (Microcrystalline quartz, SiO₂; chalcedony with possible iron-oxide coloration) — gemstone

Tumbled agate (likely banded/chalcedony agate)

Microcrystalline quartz, SiO₂; chalcedony with possible iron-oxide coloration

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

Red jasper (tumbled)

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

Orange carnelian (likely tumbled chalcedony) (Carnelian, an orange variety of chalcedony (microcrystalline quartz, SiO₂)) — gemstone

Orange carnelian (likely tumbled chalcedony)

Carnelian, an orange variety of chalcedony (microcrystalline quartz, SiO₂)

Yellow-orange chalcedony (possibly carnelian) (Microcrystalline quartz, SiO₂; orange coloration commonly from iron oxides) — mineral

Yellow-orange chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; orange coloration commonly from iron oxides

Tumbled jasper or iron-rich chert (Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides) — sedimentary

Tumbled jasper or iron-rich chert

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

Bauxite (Bauxite (Al2O3·2H2O mixed with iron oxides)) — sedimentary

Bauxite

Bauxite (Al2O3·2H2O mixed with iron oxides)

Gray chalcedony or quartz fragment (Microcrystalline quartz, SiO₂ (tentative)) — mineral

Gray chalcedony or quartz fragment

Microcrystalline quartz, SiO₂ (tentative)

Carnelian (Carnelian (Chert/Chalcedony variety of Quartz, SiO2)) — mineral

Carnelian

Carnelian (Chert/Chalcedony variety of Quartz, SiO2)

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

Tumbled jasper (likely brecciated or red jasper) (Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions) — mineral

Tumbled jasper (likely brecciated or red jasper)

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

Banded Calcite (often commercially sold as Mexican Onyx or Green Onyx) (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (often commercially sold as Mexican Onyx or Green Onyx)

Calcium Carbonate (CaCO3)

Jasper (Milky/Cream Variety) (Silicon Dioxide (SiO2) - variety of Chalcedony) — sedimentary (chemical/biological)

Jasper (Milky/Cream Variety)

Silicon Dioxide (SiO2) - variety of Chalcedony

sedimentary (chemical/biological)

Chrysoprase (SiO2) — gemstone

Chrysoprase

SiO2