Quartz pebble
Silicon dioxide (SiO2)
mineral
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
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Diorite
Intrusive Igneous Diorite
igneous
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
sedimentary
Coprolite
Fossilized feces (various taxa)
sedimentary
Peridotite
Ultramafic intrusive igneous rock
igneous
Quartzite with inclusions
Metamorphosed quartz sandstone
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Diorite
Intrusive Igneous Diorite
igneous
Chrysocolla and Malachite Beads
Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)
mineral
Granite
Granite (Plutonic Igneous Rock)
igneous
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Ferruginous Sandstone
Arenite with Iron Oxide cement (Fe2O3 / FeO(OH))
sedimentary
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mineral description (Anthropogenic material)
Tumbled brown mineral pebble, possibly jasper or weathered quartzite
Indeterminate from the blurred image; likely microcrystalline quartz (SiO₂) if jasper, or quartzite dominated by quartz
mineral
Aragonite (Banded Calcite / 'Mexican Onyx')
Aragonite (Calcium Carbonate - CaCO3)
mineral
Slate
Slate (Metamorphic silicate rock)
metamorphic
Diorite (Salt and Pepper Rock)
Diorite
igneous
Picture Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Chert (Green Jasper)
Microcrystalline Quartz (SiO2) with iron silicate inclusions
sedimentary
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Unidentified gray rock fragment
Indeterminate from image; possibly quartz- or feldspar-rich silicate material
mineral
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Tumbled translucent quartz or chalcedony fragment
Silicon dioxide, SiO₂; likely quartz/chalcedony
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2) with hematite/limonite inclusions
mineral
Polished gray metamorphic stone, likely marble
Calcite-dominant marble (CaCO₃), possibly dolomitic marble
metamorphic
Iron-stained quartz or quartzite pebble
Quartz (SiO₂), possibly quartzite with hematite/goethite staining
mineral
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2 with Iron Oxide staining)
sedimentary
Weathered copper-bearing rock, likely chrysocolla-bearing limonite
Chrysocolla (Cu₂H₂Si₂O₅(OH)₄·nH₂O) with limonite/goethite and possibly malachite
mineral
Diorite (or Gabbro/Gneiss stream pebble)
Diorite
igneous
Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Weathered iron-rich rock, possibly hematite-bearing basalt or ironstone
Uncertain; likely Fe-oxide-rich basalt/ironstone containing hematite (Fe₂O₃), magnetite (Fe₃O₄), and silicate minerals
igneous
Green Chert (Jasper / Flint)
Silicon Dioxide (SiO2)
sedimentary
Green Jasper (Agate-Jasper mixture)
Silicon Dioxide (SiO2) with impurities
sedimentary
Fossilized Coprolite
Coprolite (fossilized feces)
sedimentary
Polished chrysocolla-bearing copper mineral specimen
Chrysocolla, Cu₂H₂Si₂O₅(OH)₄·nH₂O, likely mixed with malachite and limonite/goethite
mineral
Orbicular jasper
Siliceous microcrystalline quartz (chalcedony), commonly sold as ocean jasper
rock
Granite
Intrusive igneous rock
igneous
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Granite
Felsic intrusive igneous rock
igneous