Fossilized Trilobite or Mollusk Fragment
Phylum Arthropoda / Mollusca fossil in sedimentary matrix
fossil
Category
Mineral Within Sedimentary Rock
Browse mineral within sedimentary rock specimens identified by the Rock Identifier community.
Learn about Mineral Within Sedimentary Rock in the encyclopedia
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Quartz Geode
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartz-rich)
Arenite (SiO2)
sedimentary
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Conglomerate / Breccia Matrix (Aggregated Rock)
Sedimentary Breccia / Conglomerate
sedimentary
Quartz pebble (Agate / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Mexican Crazy Lace Agate
Silicon Dioxide (SiO2) with iron and aluminum inclusions
mineral
Quartz / Chalcedony Geode Fragment
Silicon Dioxide (SiO2)
mineral
Jasper Pebble
SiO2 (Microcrystalline Quartz)
sedimentary
Amethyst and Agate Geode Section
Silicon Dioxide (SiO2) - Crystalline Quartz and Chalcedony
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Sandstone Concretion
Sandstone (Sedimentary Rock) with silica or calcite cement
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Fossil Brachiopod or Mollusk Cast
Phylum Brachiopoda / Mollusca internal mold
fossil
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
sedimentary
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Chert (Nodular)
Chert (SiO2 - Microcrystalline Quartz)
sedimentary
Gneiss
Metamorphic Gneiss
metamorphic
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
sedimentary
Ironstone Concretion (Nutstone)
Ironstone (with High Limonite/Hematite Content)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz (likely Herkimer Diamond style)
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) with Quartz Crystals on Clastic Sedimentary Rock
sedimentary
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Druzy Quartz Geode (with Chalcedony)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Quartz-lined Geode / Chalcedony Nodule
Silicon Dioxide (SiO2)
sedimentary
Gneiss and Igneous Rock Collection
Foliated Metamorphic Rock (Gneiss) / Igneous Rocks
metamorphic
Ironstone Concretion / Chert Nodules
Iron-rich Sedimentary Concretion (Fe2O3 / SiO2 mix)
sedimentary
Red Jasper (or Agate/Jasper mixture)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Quartz Geode
Crystalline Quartz (SiO2) within a sedimentary/igneous host
mineral
Quartz Geode Fragment
Crystalline Silicon Dioxide (SiO2)
mineral
Chalcedony / Agate Pebble
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion
Ironstone (Limonite/Goethite/Hematite mixture)
sedimentary