Chalcedony (Tumbled)
Cryptocrystalline Quartz (SiO2)
Category
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
Chalcedony (Tumbled)
Cryptocrystalline Quartz (SiO2)
Pyrite
Iron Sulfide (FeS2)
Aventurine Quartz
Silicon Dioxide (SiO2) with Fuchsite inclusions
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Sandstone (Ferruginous)
Arenite (with Iron Oxide cement)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Bumblebee Jasper
Carbonate-rich volcanic rock containing Sulfur and Arsenic (Realgar/Orpiment)
Sandstone
Arenite (composed primarily of SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Quartzite Cobble
Metamorphic Quartzite (SiO2)
Dalmatian Stone
Dalmatian Jasper (Aphanitic Igneous Rock with Arfvedsonite inclusions)
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
Sandstone (likely Graywacke or Arkose)
Arenite
Quartz Geode
Silicon Dioxide (SiO2) in a Secondary Formation
Green Moss Agate
Silicon Dioxide (SiO2) with Mineral Inclusions
Sandstone
Arenite (primarily SiO2)
Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
Sandstone
Arenite
Sandstone
Arenite (SiO2 primarily)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Petrified Wood
Silicified Wood (SiO2)
Sandstone (likely Graywacke or Arkose variant)
Clastic Sedimentary Rock (Lithic Sandstone)
Travertine
Terrestrial Sedimentary Limestone (CaCO3)
Sandstone
Arenite (principally SiO2)
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Sandstone
Arenite (primarily SiO2)
Quartz (Milky/Crystal variety)
Silicon Dioxide (SiO2)
Septarian Nodule
Septarian Concretion
Sandstone (with manganese staining)
Clastic sedimentary rock (primarily SiO2)
Red Sandstone
Quartz Arenite (with Iron Oxide)
Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
Banded Agate (Chert/Chaldcedony)
Silicon Dioxide (SiO₂)
Shale fragment
Shale (Laminated Mudstone)
Sandstone
Arenite (primarily SiO2)
Banded Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Sandstone
Arenite (typically with iron oxide/hematite cement)
Sandstone
Sandstone (clastic sedimentary rock), primarily SiO2
Sandstone (River Pebble)
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite with Iron Oxide staining (Fe2O3)
Sandstone
Arenite
Sandstone (Quartz-rich)
Arenite (primarily SiO2)