Basalt
Basalt (Mafic volcanic rock)
Category
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Basalt
Basalt (Mafic volcanic rock)
Asphalt (Road Aggregate)
Asphalt concrete / Bituminous mixture
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Quartzite (with Iron Staining)
Metamorphosed Quartz Sandstone (SiO2)
River Rock (Greywacke/Sandstone)
Lithic Wacke
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2)
Red Jasper
Jasper (a variety of Chalcedony, SiO₂ with impurities)
Sandstone or Mudstone with Iron Staining
Ferruginous Sandstone/Mudstone
Sandstone
Arenite (primarily SiO2)
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
Shale
Shale (composition varies: primarily clay minerals and quartz)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
Carnelian
Carnelian (SiO2)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
Amazonite
K(AlSi3O8), Microcline (potassium feldspar)
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
Moonstone
Orthoclase (KAlSi3O8) with inclusions of Albite (NaAlSi3O8)
Jasper (River pebble)
Jasper / Silicon Dioxide (SiO2)
Carnelian Agate
Carnelian (Silicon Dioxide, SiO2)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Matrix
Red Jasper
Silicon dioxide with hematite impurities (SiO2 + Fe2O3)
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Carnelian Agate
Silicon Dioxide (SiO2)
Carnelian
Carnelian (SiO2 variant)
Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
River Pebble (Siltstone/Mudstone)
Clastic sedimentary rock
Gold Placer (Gold Flakes and Nuggets)
Native Gold (Au)
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Quartz (Clear Quartz and Rose Quartz variants)
Silicon Dioxide (SiO2)
Pyrite
Iron Sulfide (FeS2)
Blue Calcite
Calcium Carbonate (CaCO3)
Banded Chert (River Cobble)
Microcrystalline Quartz (SiO2)
Carnelian
Carnelian (SiO2)
Limonite (Ironstone)
Limonite (mixture of hydrated iron oxides, primarily Goethite α-FeO(OH))
Quartzite
Quartzite (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Quartzite (River Stone)
Quartzite
Crushed Limestone Aggregate
Limestone (Calcium Carbonate, CaCO3)
Granite
Granite (a felsic intrusive igneous rock)
Vesicular Basalt (Scoria)
Basalt (Vesicular)