Quartz Geode Fragment
Silicon Dioxide (SiO2)
Category
Browse sedimentary (chemically precipitated) or metamorphic specimens identified by the Rock Identifier community.
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Banded Chert (Jasper) River Pebble
Microcrystalline Quartz (SiO2)
Jasper
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Banded iron formation fragment
BIF: microcrystalline quartz (chert/jasper) with iron oxides and/or magnetite
Chert Nodule
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
Tufa
Calcium carbonate (CaCO3) - Porous Limestone
Banded Iron Formation (BIF)
Magnetite-hematite-chert formation
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Tumbled milky quartz pebble
Quartz, silicon dioxide (SiO₂)
Banded Iron Formation (BIF) / Chert
Banded Iron Formation (SiO2 with Fe2O3 / Fe3O4)
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
Quartz (Milky or Cloudy Quartz)
Silicon Dioxide (SiO2)
Quartz-rich mineral fragment
Quartz (silicon dioxide, SiO₂), possibly milky quartz
Quartz
SiO2 (Silicon Dioxide)
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
Quartz Crystal
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Clear Quartz
SiO2 (Silicon Dioxide)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
Chert with Jasper/Quartz Inclusions
Silicon Dioxide (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
Blue Calcite Sphere
Calcium Carbonate (CaCO3)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Banded iron formation (ironstone)
Banded iron formation; chiefly hematite/magnetite (Fe₂O₃/Fe₃O₄) with chert (SiO₂)
Pyrite-bearing sulfide specimen
Pyrite (FeS₂), possibly with chalcopyrite and quartz or carbonate gangue
Raw Quartz
Silicon Dioxide (SiO2)
Green Jasper
Microcrystalline Quartz (SiO2)
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
Banded iron formation (BIF)
Banded iron formation; chiefly hematite/magnetite and microcrystalline quartz (chert)
Chert (with Quartz vein/coating)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Quartzite river pebble)
Microcrystalline Silica (SiO2)
Chert (White Variety)
Silicon Dioxide (SiO2)
Chert (Red Jasper)
Microcrystalline Quartz (SiO2)
Barite (Desert Diamond)
Barite (Barium Sulfate, BaSO4)