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

Banded Calcite (Cave Onyx) (Calcium Carbonate (CaCO3)) — sedimentary

Banded Calcite (Cave Onyx)

Calcium Carbonate (CaCO3)

Iron-stained chalcedony or jasper (Microcrystalline quartz (SiO₂), likely ferruginous jasper/chalcedony) — mineral

Iron-stained chalcedony or jasper

Microcrystalline quartz (SiO₂), likely ferruginous jasper/chalcedony

Tumbled Agate (Agate (Cryptocrystalline variety of Quartz, SiO2)) — sedimentary

Tumbled Agate

Agate (Cryptocrystalline variety of Quartz, SiO2)

Banded Agate (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Banded Agate

Silicon Dioxide (SiO2) - Chalcedony variety

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

Jasper

Silicon Dioxide (SiO2) with impurities

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

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)

Blue Agate (Dyed Chalcedony) (Silicon Dioxide (SiO2)) — sedimentary

Blue Agate (Dyed Chalcedony)

Silicon Dioxide (SiO2)

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Dyed Agate Slice (Silicon Dioxide (SiO2)) — mineral

Dyed Agate Slice

Silicon Dioxide (SiO2)

Jasper (Iron-stained Chert) (Silicon Dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper (Iron-stained Chert)

Silicon Dioxide (SiO2) with iron oxide inclusions

Polished agate slab (Banded chalcedony, a microcrystalline variety of quartz (SiO₂)) — sedimentary

Polished agate slab

Banded chalcedony, a microcrystalline variety of quartz (SiO₂)

Banded Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Banded Jasper

Silicon Dioxide (SiO2) with impurities

Red Jasper (Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)) — sedimentary

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

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

Polished carnelian

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

Polished carnelian (likely) (Carnelian, orange-red chalcedony; microcrystalline quartz (SiO₂)) — gemstone

Polished carnelian (likely)

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

Tumbled brown jasper (probable) (Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities) — mineral

Tumbled brown jasper (probable)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities

Jasper (likely brecciated jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides) — mineral

Jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Green Moss Agate (Silicon Dioxide with inclusions (SiO2 + Mn/Fe)) — sedimentary

Green Moss Agate

Silicon Dioxide with inclusions (SiO2 + Mn/Fe)

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

Jasper

Silicon Dioxide (SiO2) with impurities

Quartz Geode (partially formed/chalcedony with iron staining) (Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides) — Mineral/Sedimentary Rock Feature

Quartz Geode (partially formed/chalcedony with iron staining)

Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides

Mineral/Sedimentary Rock Feature

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

Yellow-brown chert or jasper

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

Tumbled yellow jasper or chert (Microcrystalline quartz (SiO₂), likely iron-stained jasper/chert) — mineral

Tumbled yellow jasper or chert

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

Yellow Jasper (Silicon Dioxide with Limonite/Goethite inclusions (SiO2)) — sedimentary

Yellow Jasper

Silicon Dioxide with Limonite/Goethite inclusions (SiO2)

Polished jasper or iron-stained chert (Microcrystalline quartz (SiO₂), commonly chalcedony with iron-oxide staining) — mineral

Polished jasper or iron-stained chert

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

Seam Agate (Agate (Banded variety of Chalcedony, SiO2)) — mineral

Seam Agate

Agate (Banded variety of Chalcedony, SiO2)

Quartz-lined agate/geode slice (Microcrystalline quartz (chalcedony, SiO₂) with drusy quartz; possibly calcite inclusions) — mineral

Quartz-lined agate/geode slice

Microcrystalline quartz (chalcedony, SiO₂) with drusy quartz; possibly calcite inclusions

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

Jasper (Chert)

Silicon Dioxide (SiO2)

Agate (SiO2) — mineral

Agate

SiO2

Snowflake Obsidian (Volcanic Glass with Spherulite Inclusions (primarily SiO2)) — igneous

Snowflake Obsidian

Volcanic Glass with Spherulite Inclusions (primarily SiO2)

Brown chalcedony (likely carnelian/iron-stained quartz) (Microcrystalline quartz, SiO₂; brown coloration from iron oxides/hydroxides) — mineral

Brown chalcedony (likely carnelian/iron-stained quartz)

Microcrystalline quartz, SiO₂; brown coloration from iron oxides/hydroxides

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

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Polished brecciated jasper (Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide staining and angular mineral fragments) — metamorphic

Polished brecciated jasper

Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide staining and angular mineral fragments

Tumbled yellow jasper or chert pebble (Microcrystalline quartz (SiO₂), likely jasper/chert with iron-oxide staining) — sedimentary

Tumbled yellow jasper or chert pebble

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

Dalmatian Jasper (Peralkaline rock with Tourmaline spots) — igneous

Dalmatian Jasper

Peralkaline rock with Tourmaline spots

Chert (Chalcedony/Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Chalcedony/Flint)

Silicon Dioxide (SiO2)

Red Jasper (Silicate (SiO2 with Hematite impurities)) — sedimentary

Red Jasper

Silicate (SiO2 with Hematite impurities)

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

Polished jasper pebble

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

Asphalt Chunk (with aggregate) (Bituminous concrete / Anthropogenic conglomerate) — sedimentary (anthropogenic/man-made conglomerate)

Asphalt Chunk (with aggregate)

Bituminous concrete / Anthropogenic conglomerate

sedimentary (anthropogenic/man-made conglomerate)

Polished carnelian (red-orange chalcedony) (Carnelian, a cryptocrystalline variety of quartz (SiO₂), commonly colored by iron oxides) — gemstone

Polished carnelian (red-orange chalcedony)

Carnelian, a cryptocrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Polished River Jasper (Silicon Dioxide (SiO2) with iron and other mineral inclusions) — sedimentary

Polished River Jasper

Silicon Dioxide (SiO2) with iron and other mineral inclusions