Sandstone Concretion (Omar or Nut Rock)
Sedimentary Concretion (specifically an 'Omarolluk' or Omar)
Category
Browse mineral or sedimentary rock (with mineral inclusions) specimens identified by the Rock Identifier community.
Sandstone Concretion (Omar or Nut Rock)
Sedimentary Concretion (specifically an 'Omarolluk' or Omar)
Sandstone
Arenite (primarily SiO2)
Sandstone with Iron Oxide Staining
Arenite with Limonite/Hematite alteration
Milky Quartz
Silicon Dioxide (SiO2)
Sandstone
Arenite (SiO2 based)
Geode (Unopened)
Crystalline Quartz or Chalcedony filled Geode (SiO2)
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
Sandstone (Iron-stained)
Arenite (primarily Quartz, SiO2)
Sandstone
Arenite (SiO2 primarily)
Green Aventurine
Silicon Dioxide (SiO2) with Chromium-bearing Fuchsite
Sandstone
Arenite (SiO2 predominantly)
Red Jasper
SiO2 (Silicon Dioxide with Hematite inclusions)
Sandstone (likely Graywacke or Arkose)
Arenite
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide Fe2O3 cement)
Pebble with Basaltic and Quartz-rich Banding
Polymictic Lithic Pebble
Sandstone
Arenite (SiO2 based typically)
Sandstone
Arenite (SiO2 composed primarily of quartz)
Quartz / Calcite Pebble
SiO2 (Quartz) or CaCO3 (Calcite)
Jasper (Green Jasper/Heliotrope variety)
Silicon Dioxide (SiO2)
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
Dalmatian Stone (Dalmation Jasper)
Aplite with Arfvedsonite inclusions
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2)
Sandstone (likely Red/Brown Sandstone)
Arenite (SiO2 based)
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
Sandstone
Sandstone (clastic sedimentary rock)
Sandstone (Calcareous or Quartz-rich)
Arenite
Sandstone
Arenite (SiO2 based)
Jasper Pebble
SiO2 (Microcrystalline Quartz)
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
Sandstone (with Chert/Quartzite nodules)
Clastic sedimentary rock (primarily SiO2)
Yellow Chert (Yellow Jasper)
Silicon dioxide (SiO2)
Yellow Jasper
Microcrystalline Quartz (SiO2)
Sandstone
Arenite (SiO2 primarily)
Sandstone
Quartz Arenite / Sedimentary Rock
Sandstone
Arenite (Siliclastic sedimentary rock)
Milky Quartz
Quartz (SiO2)
Basalt with Granite Inclusions (Xenoliths)
Mafic igneous rock (Basalt) with Sialic minerals