Quartz pebble
Silicon dioxide (SiO2)
Category
Browse sedimentary rock (possibly conglomerate or breccia with a quartz vein) specimens identified by the Rock Identifier community.
Quartz pebble
Silicon dioxide (SiO2)
Druzy Quartz on Agate/Chert
Silicon Dioxide (SiO2)
Chert Pebble (Jasper variant)
Microcrystalline Quartz (SiO2)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide staining/cementing)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Sandstone (Quartzite-rich Pebble)
Arenite (composed primarily of SiO2)
Red Jasper (in Quartz/Chalcedony)
Silicon Dioxide (SiO2) with iron oxide inclusions
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Chert / Flint Nodule
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Jasper
Jasper (Silica/Quartz) - SiO2
Green Fluorite
Fluorite (Calcium Fluoride) - CaF2
Blue Lace Agate
Agate (Variety of Chalcedony, SiO2)
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
Jasper in Quartz (River Cobble)
Silicon Dioxide (SiO2) with Ferric Iron inclusions
Quartz Pebble
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Petrified Wood
Silicified Wood (primarily SiO2)
Crushed Limestone and Calcite
Calcium Carbonate (CaCO3)
Jasper
Jasper (Silicon Dioxide, SiO2)
Geode with Quartz Crystal Cavity
Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix
River Stone (Chert/Siltstone)
Cryptocrystalline Quartz (SiO2) with trace impurities
Sandstone (Red Sandstone)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide)
Sandstone (Quartz-rich)
Sandstone (SiO2 dominated)
Gneiss (Banded Gneiss)
Gneiss
Sandstone (Red/Brown Variety)
Arenite (composed primarily of SiO2 with Fe2O3 iron oxide inclusions)
Banded Gneiss
Gneiss (Metamorphic Rock)
Amethyst
SiO2 (Silicon Dioxide) - a variety of Quartz
Clear Quartz
Silicon Dioxide (SiO2)
Yellow Quartz (Iron-Stained Quartz)
Silicon Dioxide (SiO2) with iron oxide inclusions
Quartz (Specifically Clear to Smoky Quartz point)
Silicon Dioxide (SiO2)
Chert (Nodule/Pebble)
Chert (Silicon Dioxide, SiO2)
Agate (specifically Carnelian Agate or Lake Superior style Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
Chert (Iron-stained)
Chert (SiO2)
Carnelian
Carnelian (Silicon Dioxide - SiO2)
Chert
Chert (microcrystalline quartz)
Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
Red Sandstone (Iron-rich)
Ferruginous Sandstone (variable formula, primarily SiO2 + Fe2O3)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Chert (with Drusy Quartz Pocket)
Silicon Dioxide (SiO2)