Fossilized Bone
Permineralized Vertebrate Bone
Category
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Fossilized Bone
Permineralized Vertebrate Bone
River Pebbles (Stream-rounded rocks)
Fluvial Detritus (varied mineralogy)
Sandstone
Arenite (Sedimentary rock composed of sand-sized grains, primarily SiO2)
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Basalt
Basalt (Mafic volcanic rock)
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Red Sandstone
Arenite (SiO2 based with Fe2O3)
Sandstone
Arenite (Clastic Sedimentary Rock)
Sandstone
Arenite (predominantly SiO2 with iron oxides)
Sandstone
Sedimentary Rock (Quartz arenite)
Sandstone
Arenite (primarily SiO2)
Concretionary limestone or calcarenite pebble
Micritic limestone/calcarenite, primarily calcite (CaCO₃)
Conglomeratic breccia
Clast-supported polymictic conglomerate/breccia, cemented by silica- or carbonate-rich matrix
Banded Greywacke
Greywacke (Lithic wacke)
Greywacke (River Pebble)
Dirty Sandstone (SiO2 with lithic fragments)
Coquina Jasper
Fossiliferous Chalcedony (SiO2)
Script Jasper
Cryptocrystalline Quartz (SiO2) with fossiliferous inclusions
Conglomerate
Conglomerate
Sandstone
Arenite (Clastic Sedimentary Rock)
Sandstone
Clastic sedimentary rock (Arenite)
Conglomerate
Conglomeratic Sandstone / Sedimentary Breccia
Limestone with Calcite Veins
Sedimentary Calcium Carbonate (CaCO3)
Sandstone
Arenite
Sandstone
Clastic sedimentary rock (primarily SiO2)
Red Sandstone
Arenite (primarily Quartz with Iron Oxide)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
River Pebble (Sandstone / Quartzite)
Sedimentary rock (Quartz arenite / Quartzite pebble)
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
Honey Calcite
Calcium Carbonate (CaCO3)
Sandstone (River Stone)
Arenite (composed primarily of SiO2)
Sandstone (Red Sandstone)
Arenite (predominantly SiO2 with Fe2O3 cement)
Sandstone (Weathered Pebble)
Arenite (SiO2 primarily)
Sandstone Pebble
Arenite (primarily Quartz, SiO2)
Sandstone (Ferruginous)
Arenite with Iron Oxides
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
Conglomerate (or Breccia)
Clastic Sedimentary Rock
Sandstone
Arenite (Sedimentary Rock)
Fossiliferous Limestone
Sedimentary rock containing Indeterminate Fossil remains (likely Crinoid stem or Bryozoan fragment)
Jasper Breccia
Silicon Dioxide (SiO2) - Brecciated Microcrystalline Quartz
Sandstone (likely Calcareous or Quartz-rich)
Arenite (SiO2 based typically)