Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Category
Non Geological
Browse non geological specimens identified by the Rock Identifier community.
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
SiO2 (Silicon Dioxide)
mineral
Quartz with Iron Staining
Silicon dioxide (SiO2)
mineral
Tumbled Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Titanium Aura Quartz
Silicon Dioxide (SiO2) coated with Titanium and Niobium
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Quartz (White/Milky)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Small rounded pebble
Unidentified lithic clast; likely fine-grained sandstone, mudstone, or basalt
sedimentary
Digital Multimeter (Synthetic Object)
Digital Multimeter (DMM)
not a rock
Pyrite
Iron Sulfide (FeS2)
mineral
Mica (Muscovite)
Muscovite, KAl2(AlSi3O10)(OH)2
Mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Unidentifiable Rock Fragment
Uncertain
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Banded Sandstone / Siltstone
Sedimentary Rock (Quartzose Sandstone / Siltstone)
sedimentary
Greenstone
Metabasalt / Chlorite schist
metamorphic
Granite
Intrusive Igneous Rock
igneous
River Rock (Greywacke/Sandstone)
Arenite / Lithic Sandstone
sedimentary
Ferruginous Sandstone
Arenite with Iron-oxide cement
sedimentary
Gravel and Pebbles
Unconsolidated rock fragments / detrital sediment
sedimentary
Granite Boulder
Felsic Intrusive Igneous Rock
igneous
Sandstone
Clastic sedimentary rock (Quartz arenite)
sedimentary
Banded Iron Formation / Hematite-Chert Matrix
Fe2O3 + SiO2 (Hematite and Microcrystalline Quartz)
sedimentary
Shale and Pebble Fragment
Sedimentary Rock (Mudstone/Shale with Silica Pebble)
sedimentary
Quartz Vein in Greenstone
Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock
metamorphic
Quartz with Host Rock
SiO2 (Quartz) with fine-grained Matrix
sedimentary
Banded Iron Formation (Jaspilite)
Banded Iron Formation (BIF); predominantly Hematite (Fe2O3) and Magnetite (Fe3O4) with Chert/Jasper (SiO2)
sedimentary
Sandstone with Iron Concretion
Arenite with Limonite/Goethite Concretion
sedimentary
River Rock (likely Basalt or Greywacke)
Basalt or Lithic Sandstone
Igneous or Sedimentary (water-worn)
River Rocks (Basalt and Sedimentary Stones)
Mafic Igneous Rock (Basalt) and Clastic Sedimentary Rock
igneous and sedimentary
Painted Pet Rock (Quartzite/Sandstone base)
Silicon Dioxide (SiO2) with anthropomorphic acrylic embellishments
sedimentary
Glauconite (Greensand)
Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
sedimentary
Seashell Fragment (Aragonite/Calcite)
Calcium Carbonate (CaCO3) - Shell fragment
sedimentary
Milky Quartz with Iron Staining
Quartz (SiO2)
mineral
Fossilized Coral
Cnidaria (Anthozoa), often replaced by Calcium Carbonate (CaCO3) or Silica (SiO2)
sedimentary
Pearl-embellished decorative cross
Pearl (biogenic calcium carbonate, predominantly aragonite) with rhinestone-mounted glass or synthetic gemstones
gemstone