Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon dioxide (SiO2)
Chert (specifically Red Chert or Jasper)
Microcrystalline Quartz (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz (Jasper / Chert)
Silicon Dioxide (SiO2)
Jasper
Microcrystalline quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Chert (or potentially Jasper/Chalcedony)
SiO2 (Silicon Dioxide)
Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Chert (Flint with Chalk/Calcite)
Sedimentary cryptocrystalline quartz (SiO2)
Quartz Geode
Quartz (Silicon Dioxide, SiO2)
Chert Nodule
Microcrystalline Quartz (SiO2)
Tumbled Agate
Silicon Dioxide (Quartz variety: Chalcedony)
Likely quartz fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock
Quartz Geode Fragment
Silicon Dioxide (SiO2)
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)
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)
Limestone
Sedimentary rock composed mainly of calcite (CaCO3)
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)
Sandstone
Arenite (primarily SiO2)
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.
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)
Sea Shell Fragment (Calcium Carbonate)
Aragonite / Calcite (CaCO3)
Sandstone (lithic wake or graywacke)
Clastic sedimentary rock (primarily quartz and lithic fragments)