Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Anthropogenic (Man-made)
Category
Mineralological Specimen
Browse mineralological specimen specimens identified by the Rock Identifier community.
N/A - Non-Geological Item
not a rock/mineral
Kidney Stone (Medical Specimen)
Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O
Mineral (Biogenic)
Quartzite
Quartzite (SiO2)
metamorphic
River Quartz Pitting/Cobble
Silicon Dioxide (SiO2)
mineral
Quartz on Sandstone
Silicon Dioxide (SiO2) in Lithic Sandstone
sedimentary
River Pebble (Likely Quartzite or Chalcedony)
Silicon Dioxide (SiO2) - granular metamorphic variety
metamorphic
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Druzy on Matrix (likely Agate or Jasper)
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Portable Ceramic Space Heater
Polished Acrylonitrile Butadiene Styrene (ABS) Plastic with Ceramic Heating Elements
not a rock (synthetic/industrial object)
Turquoise (with Hematite)
CuAl6(PO4)4(OH)8·4H2O
mineral
Sedimentary Breccia
Breccia (Clastic Sedimentary Rock)
sedimentary
Agate
Silicon dioxide (SiO2)
mineral
N/A (Non-Geological Specimen)
N/A
Granite (Orthoclase rich)
Granite (composed primarily of Quartz and Potassium Feldspar KAlSi3O8)
igneous
Cubic Zirconia (in Jewelry)
Zirconium Dioxide (ZrO2)
mineral
Quartz (Smoky/Grey variety)
Silicon Dioxide (SiO2)
mineral
Pegmatite with Schorl (Black Tourmaline) and Mica
Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)
igneous
Chalcedony (Desert Rose or Botryoidal Chalcedony)
Silicon Dioxide (SiO2)
mineral
Moqui Marble
Iron Oxide Concretion (Limonite/Hematite shell with Sandstone core)
sedimentary
Peridot
Olivine (Mg, Fe)2SiO4
mineral
Dendritic Agate or Manganese Nodule in Chert/Limestone
Silicon Dioxide (SiO2) with Manganese Oxide (MnO2) inclusions
sedimentary
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Limonite-stained Chert/Jasper
Microcrystalline Quartz (SiO2) with Iron Oxides (FeO(OH)·nH2O)
sedimentary
Jasper (Green Jasper/Heliotropic Chert)
Silicon Dioxide (SiO₂)
sedimentary
Chert (Iron-stained)
Microcrystalline Quartz (SiO2)
sedimentary
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Quartz with Mica (likely Muscovite)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride
igneous/metamorphic
Tiger's Eye (Tumbled Blue/Black-Golden variety)
Pseudomorph of Quartz after Crocidolite (SiO2 with Iron inclusions)
metamorphic
Sandstone (Quartzite texture)
Arenite (SiO2 secondary)
sedimentary
Granite Cobble
Granite (Phaneritic Quartz-Feldspar specimen)
igneous
Druzy Quartz on Matrix (likely Limestone or Sandstone)
Silicon Dioxide (SiO2) with various trace impurities
Mineral on Sedimentary Rock
Agate
Silicon dioxide (SiO2) - variety Chalcedony
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Granite Pegmatite
Phaneritic Plutonic Igneous Rock
igneous
Druzy Quartz on Agate/Chert
Silicon Dioxide (SiO2)
mineral
Calamites Fossil (Horsetail Stem)
Calamites (Genus), part of the class Equisetopsida
sedimentary
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Gold (Elemental Metal)
Gold (Au)
Mineral