Quartz Pebble
Silicon Dioxide (SiO2)
Category
Browse rock specimens identified by the Rock Identifier community.
Quartz Pebble
Silicon Dioxide (SiO2)
Fossiliferous Chert with Brachiopod Impression
Chert (SiO2) containing Brachiopoda fossil remains
Gneiss (Pebble)
Gneiss
Ferrous Slag (Iron Smelting By-product)
Fused Siliceous Slag
Sandstone (Painted)
Arenite (primarily SiO2)
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Chert (Yellow/Tan Variety)
Chert (SiO2)
Serpentine (Serpentinite)
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Grey Limestone Pebble
Limestone (Calcium Carbonate - CaCO3)
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Slate with Quartz Vein
Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)
Quartzite River Rock
Quartzite (primarily SiO2)
Unakite
Epidotized Granite
Shale
Fissile mudrock (composed of clay-sized particles and detrital grains)
Sandstone or Quartzite
Arenite (if sedimentary) / Quartzite (if metamorphic)
Sandstone (Glacial Cobble)
Arenite / Sedimentary Rock (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Vesicular Basalt with Epidote
Vesicular Basalt (Mg, Fe)2SiO4 with Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
Quartzite with Hematite staining
Quartzite (SiO2) with iron oxide inclusions
Quartzite (River Pebble)
Meta-quartzite (composed primarily of SiO2)
Yellow Quartzite (River Pebble)
Quartzite (primarily Silicon Dioxide, SiO2)
Shale
Fissile mudstone (Shale)
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
Quartzite
Quartzite (primarily SiO2)
Serpentine
Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
Sandstone (with Iron Staining)
Clastic sedimentary rock (SiO2 with Fe2O3 oxides)
Milky Quartz
Quartz (Silica / Silicon Dioxide), SiO2
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
Unknown Rock Specimen
Shale
Fissile Siliciclastic Sedimentary Rock
Agate
Silicon Dioxide (SiO2) - variety Chalcedony
Agate (specifically a Yellow/Honey Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Granodiorite or Diorite
Granodiorite / Diorite
Quartz-veined Mudstone or Argillite
SiO2 (Quartz) in Siltstone/Mudstone matrix
Basalt with Quartz/Quartzite Veins
Aphanitic Mafic Volcanic Rock with Siliceous Infillings
Greywacke (likely)
Greywacke (a type of sandstone)
Quartz in Matrix (possibly Basalt or Siltstone host)
Silicon Dioxide (SiO2) in Host Rock
Quartz (Druzy)
Silicon Dioxide (SiO2)
Basalt
Basalt (Mafic volcanic rock)