Rock Identifier

Category

Sedimentary (Silicified Fossiliferous Chalcedony)

Browse sedimentary (silicified fossiliferous chalcedony) specimens identified by the Rock Identifier community.

Learn about Sedimentary (Silicified Fossiliferous Chalcedony) in the encyclopedia

Fossiliferous Limestone

Fossiliferous Limestone

Chalcedony

Chrome Chalcedony

Chrome Chalcedony

Blue Chalcedony

Blue Chalcedony

Silcrete

Opalized Wood

Shelly Limestone

Shelly Limestone

Petrified Wood

Conglomerate

Gem Silica

Mookaite

Chrysoprase

Orange chalcedony (likely carnelian) (Microcrystalline quartz, SiO₂; iron-bearing chalcedony (carnelian)) — gemstone

Orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; iron-bearing chalcedony (carnelian)

Carnelian Agate (Silicon Dioxide (SiO2)) — mineral

Carnelian Agate

Silicon Dioxide (SiO2)

Chalcedony in Host Rock (Chalcedony (SiO2)) — mineral

Chalcedony in Host Rock

Chalcedony (SiO2)

Mixed Quartz and River Pebbles (Stone Collection) (Mixed assortment containing mainly Silicon Dioxide (SiO2)) — igneous, sedimentary, metamorphic, and mineral

Mixed Quartz and River Pebbles (Stone Collection)

Mixed assortment containing mainly Silicon Dioxide (SiO2)

igneous, sedimentary, metamorphic, and mineral

Tiger's Eye (Oeil de Tigre) (Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)) — metamorphic

Tiger's Eye (Oeil de Tigre)

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Yellow Chalcedony (Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)) — Mineral

Yellow Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)

Petrified Wood (Silicified Wood (primarily SiO₂ / Silicon Dioxide)) — mineral

Petrified Wood

Silicified Wood (primarily SiO₂ / Silicon Dioxide)

Fossiliferous Limestone / Fossil Fragment (Calcium Carbonate (CaCO3) with indeterminate biogenic remains) — fossil

Fossiliferous Limestone / Fossil Fragment

Calcium Carbonate (CaCO3) with indeterminate biogenic remains

Blue Chalcedony (Cryptocrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Cryptocrystalline Quartz (SiO2)

Yellow Chalcedony (Yellow Agate) (Silicon Dioxide (SiO2)) — gemstone

Yellow Chalcedony (Yellow Agate)

Silicon Dioxide (SiO2)

Agate (Chalcedony (SiO2)) — mineral

Agate

Chalcedony (SiO2)

Petrified Wood (Silicified wood (primarily Silicon Dioxide - SiO2)) — mineral (silicate-replaced organic material)

Petrified Wood

Silicified wood (primarily Silicon Dioxide - SiO2)

mineral (silicate-replaced organic material)

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Orange chalcedony (likely carnelian), polished shard (Microcrystalline quartz, SiO₂; chalcedony variety, orange iron-oxide coloration) — gemstone

Orange chalcedony (likely carnelian), polished shard

Microcrystalline quartz, SiO₂; chalcedony variety, orange iron-oxide coloration

Fossil Coral (Anthozoa fossil (Calcite / SiO2 replacement)) — fossil

Fossil Coral

Anthozoa fossil (Calcite / SiO2 replacement)

Quartz Geode (Silicon Dioxide (SiO2) in Geode formation) — mineral

Quartz Geode

Silicon Dioxide (SiO2) in Geode formation

Weathered quartz-rich cobble (probable quartzite or silicified rock) (Quartzite, predominantly SiO₂; exact identification is uncertain from the photograph) — metamorphic

Weathered quartz-rich cobble (probable quartzite or silicified rock)

Quartzite, predominantly SiO₂; exact identification is uncertain from the photograph

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Petrified Wood (Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)) — metamorphic

Petrified Wood

Silicified wood (primarily SiO2 - Silicon Dioxide/Quartz)

Fossilized Favosites Coral (Honeycomb Coral) (Favosites (extinct genus Table Coral)) — fossil

Fossilized Favosites Coral (Honeycomb Coral)

Favosites (extinct genus Table Coral)

Dalmation Stone (often called Dalmatian Jasper) (Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite) — igneous

Dalmation Stone (often called Dalmatian Jasper)

Peralkaline Rock (Microgranite/Aplite), SiO2 with inclusions of Arfvedsonite

Banded Agate (Carnelian-Agate) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (Carnelian-Agate)

Silicon Dioxide (SiO2)

Polished Agate Geode (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Polished Agate Geode

Silicon Dioxide (SiO2) - Microcrystalline Quartz

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

Jasper

Jasper (Silicon Dioxide, SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Quartzite with Hematite staining (Metamorphic Quartzite (SiO2) with Ferruginous Oxides) — metamorphic

Quartzite with Hematite staining

Metamorphic Quartzite (SiO2) with Ferruginous Oxides

Tumbled Agate (Silicon Dioxide (SiO2)) — gemstone

Tumbled Agate

Silicon Dioxide (SiO2)

Petrified Wood (Silicified Wood (primarily SiO₂ - Silicon Dioxide)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

Chalcedony (Chalcedony (a microcrystalline variety of Quartz, SiO2)) — Mineral

Chalcedony

Chalcedony (a microcrystalline variety of Quartz, SiO2)

Fossiliferous Shale or Slate with Plant Fossils (Fossil-bearing argillaceous rock) — Sedimentary/Metamorphic

Fossiliferous Shale or Slate with Plant Fossils

Fossil-bearing argillaceous rock

Sedimentary/Metamorphic

Fossil-bearing limestone (Bioclastic limestone, likely containing bivalve or brachiopod impressions) — fossil

Fossil-bearing limestone

Bioclastic limestone, likely containing bivalve or brachiopod impressions

Carnelian (Carnelian (Silicon Dioxide - SiO2)) — mineral

Carnelian

Carnelian (Silicon Dioxide - SiO2)

Petoskey Stone (Hexagonaria percarinata (Silicified/Calcitic)) — fossil

Petoskey Stone

Hexagonaria percarinata (Silicified/Calcitic)

Yellow Jasper (Silicon dioxide, SiO2) — mineral

Yellow Jasper

Silicon dioxide, SiO2

Jasper Pendant (Chalcedony (Quartz) - SiO2) — Mineral/Sedimentary

Jasper Pendant

Chalcedony (Quartz) - SiO2

Mineral/Sedimentary

Agate (SiO2 (Chalcedony / Quartz)) — sedimentary

Agate

SiO2 (Chalcedony / Quartz)

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

Leopard Skin Jasper (Silicon Dioxide (SiO2) with mineral inclusions) — mineral

Leopard Skin Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Blue chalcedony cabochon (probable) (Chalcedony, cryptocrystalline quartz; silicon dioxide (SiO₂)) — gemstone

Blue chalcedony cabochon (probable)

Chalcedony, cryptocrystalline quartz; silicon dioxide (SiO₂)

Agate (Chalcedony (SiO2) with impurities) — sedimentary

Agate

Chalcedony (SiO2) with impurities

White Jade / White Chalcedony (Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)) — Mineral

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Banded Agate (Cryptocrystalline Quartz (SiO2)) — sedimentary

Banded Agate

Cryptocrystalline Quartz (SiO2)