Jasper
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (man made composite) specimens identified by the Rock Identifier community.
Jasper
Microcrystalline Quartz (SiO2)
Chert (or potentially Jasper/Chalcedony)
SiO2 (Silicon Dioxide)
Chert (Flint with Chalk/Calcite)
Sedimentary cryptocrystalline quartz (SiO2)
Ironstone Concretion / Limonite Node
Ferruginous Sedimentary Rock (composed primarily of Limonite FeO(OH)·nH2O and Goethite)
Tumbled Agate
Silicon Dioxide (Quartz variety: Chalcedony)
Likely quartz fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock
Quartz Geode
Quartz (Silicon Dioxide, SiO2)
Chert Nodule
Microcrystalline Quartz (SiO2)
Red Sandstone
Clastic Terrigenous Sedimentary Rock (primarily SiO2 with Fe2O3 coating)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Sandstone
Arenite (Clastic Sedimentary Rock)
Banded limestone or marble
Calcite-dominated carbonate rock; likely banded marble (CaCO₃)
Sandstone
Sandstone (clastic sedimentary rock)
Fossiliferous Limestone
Sedimentary Calcium Carbonate (CaCO3)
Travertine
Terrestrial Sedimentary Limestone (CaCO3)
Sandstone
Arenite (Clastic Sedimentary Rock)
Chert / Jasper Pebble
Microcrystalline Quartz (SiO2)
River Cobble (Sandstone)
Arenite / Quartz Sandstone
Sandstone (Greywacke)
Arenite / Wacke (SiO2 + varied clasts)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Sandstone (with manganese staining)
Clastic sedimentary rock (primarily SiO2)
Limestone
Sedimentary Rock (Primarily CaCO3)
Coal
Coal (Combustible sedimentary rock)
Sandstone
Quartzose Sandstone (Sedimentary Rock)
Sandstone
Sedimentary Rock (Quartzose Sandstone)
Siltstone
Siltstone (Detrital Sedimentary Rock)
Conglomerate
Conglomerate (clastic sedimentary rock)
Conglomerate
Conglomerate (clastic sedimentary rock)
Sandstone with Quartz Crystal Infill
Quartz-cemented quartz arenite
Sandstone
Sandstone (SiO2 dominated)
Dalmatian jasper
Dalmatian stone; commonly a leucocratic alkali-feldspar-rich igneous rock with arfvedsonite or aegirine inclusions
Vesicular basalt (likely amygdaloidal basalt)
Basalt, a mafic volcanic rock composed mainly of plagioclase feldspar, clinopyroxene, and commonly olivine; vesicles are partly mineral-filled amygdules.
Quartz Pebble
Silicon Dioxide (SiO2)
Chert
Microcrystalline quartz (SiO2)
Sandstone
Arenite (SiO2 principal component)
Shale (or Mudstone)
Laminose Mudrock (composition: clay minerals, quartz, and mica flakes)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone Pebble
Arenite (SiO2 with minor mineral cements)
Sandstone (lithic wake or graywacke)
Clastic sedimentary rock (primarily quartz and lithic fragments)
Sandstone
Arenite (SiO2 primarily)
Dalmatian Jasper
Peralkaline rhyolite with arfvedsonite inclusions
Chert (Limonite-stained)
Microcrystalline Quartz (SiO2) with iron oxides