Red Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Red Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
Common Opal in Host Rock
Hydrated Silica (SiO2·nH2O)
Quartz Vein in Hematitic Siltstone
Hydrothermal Quartz (SiO2) in Ferriferous Matrix
Sandstone
Arenite (primarily SiO2)
Quartz with Sericite and Cinnabar
Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)
Amygdaloidal Basalt
Extrusive Igneous Rock with Secondary Mineral Fillings
Quartz Pebble
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (Chalcedony variety), SiO2
Limestone with Fossil Fragment
Bioclastic limestone (Calcium carbonate, CaCO3)
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
Sandstone with Iron Oxide Concretions
Quartzose Sandstone with Limonite/Hematite
Jasper
Microcrystalline Quartz (SiO2)
Jasper and Quartz
Silicon Dioxide (SiO2)
Quartz Pebble (with Dark Volcanic/Sedimentary Inclusion)
Silicon Dioxide (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Tiger's Eye
Silicon dioxide (Quartz pseudomorph after crocidolite), SiO2
Quartz Pebble (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with Hematite/Limonite inclusion
Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Sandstone
Sedimentary Rock (Quartz Sandstone)
Sandstone with Dendritic Inclusions
Quartzose Sandstone
Quartz Pebble / Quartzite Pebble
SiO2 (Silicon Dioxide)
Pink Granite
Granite (enriched in Potassium Feldspar / Orthoclase)
Petrified Wood
Silicified Wood (Silicon Dioxide - SiO2)
Quartzite with Quartz Veins
Metamorphic Quartzite (SiO2)
Quartz Pebble (with Feldspar/Mica)
Granitic Quartz / SiO2 with KAlSi3O8
Sandstone / Chert Gravel
SiO2 (Silicon Dioxide based clastic sedimentary rock)
Jasper Pebble
Microcrystalline Quartz (SiO2)
Vesicular Basalt (Scoria)
Vesicular Basalt
Chalcedony (Quartz)
Silicon dioxide (SiO2)
Yellow Chalcedony (likely Carnelian or Agate)
Silicon dioxide (SiO2)
Quartz and Iron Oxide
Quartz (Silicon Dioxide, SiO2) with possible Limonite/Hematite inclusions
Quartz (Bull Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Jasper
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Travertine / Tufa
Calcium Carbonate (CaCO3)
Yellow Quartz / Chalcedony
Silicon Dioxide (SiO2)
Granite River Cobble
Granitoid (comprising Quartz, Feldspar, and Mica)
Jasper
Silicon dioxide (SiO2)
Beach Pebble (likely Basalt or Chert)
Volcanic Basalt / Microcrystalline Quartz
Quartzite Pebble
Metamorphic Quartzite (primarily SiO2)