Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Chert (Jasper/Chalcedony)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert / Flint Jasper
Microcrystalline Quartz (SiO2)
Quartz
Silicon Dioxide (SiO2)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
Hematite
Iron(III) oxide (Fe2O3)
Chert
Microcrystalline silica (SiO2)
Chert (Concretion or Nodular Variety)
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
Bauxite
Bauxite (mixture of Hydrous Aluminum Oxides)
Hematite
Iron(III) oxide (Fe2O3)
Possible tumbled jasper or iron-rich chert
Microcrystalline quartz (SiO₂), commonly colored by iron oxides
Shale
Clastic sedimentary rock (primarily clay and silt minerals)
Weathered Sedimentary Rock with Liesegang Rings
Sandstone or Siltstone with Iron Oxide Banding
Cardstock (Paper)
Cellulose (C6H10O5)n
Asphalt (Bituminous Pavement)
Bituminous mix (Aggregates with Bitumen binder)
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
Geode with Quartz/Chalcedony
Silicon Dioxide (SiO2)
Vesicular basalt (likely iron-rich scoria)
Basaltic volcanic rock; chiefly plagioclase, clinopyroxene, olivine, and Fe-Ti oxides
Banded Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Blue Tiger's Eye (Hawk's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2)
Orange Calcite (likely polished specimen)
Calcite
Chert Arrowhead
Microcrystalline Quartz (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Goethite / Limonite Gossan
Hydrated Iron Oxide (FeO(OH))
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
Chert (Flint/Jasper)
Silicon Dioxide (SiO2)
Tumbled goldstone-like quartz pebble
Likely iron-stained quartz or jasper; exact identification requires testing
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Quartz Geode (River Cobble)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz Boulder
Silicon Dioxide (SiO2)
Limonite Concretion
Hydrated Iron Oxide-Hydroxide, FeO(OH)·nH2O
Limonite / Ironstone
Hydrated Iron Oxide (FeO(OH)·nH2O)
Quartz
Silicon Dioxide (SiO2)
White Quartz
Quartz (Silicon Dioxide, SiO2)