Granite
Granite (a plutonic igneous rock)
Igneous
Category
Not A Natural Rock (Man Made Composite)
Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.
Orange Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Diamond (Uncut Crystal)
Carbon (C)
mineral
Smoky Quartz Cluster
Quartz (Silicon Dioxide) - SiO2
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Citrine
Yellow Quartz (SiO2)
mineral
Granite
Granite (Mainly Quartz SiO2, K-Feldspar KAlSi3O8, and Plagioclase)
igneous
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Granite
Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Red Sandstone
Arenite (primarily Quartz SiO2 with Hematite Fe2O3 cement)
sedimentary
Larimar
Pectolite (a blue variety of Pectolite)
Mineral
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Banded Jasper (possibly "Picture Jasper")
Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)
Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)
Limestone (River Pebble)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Conglomerate
Conglomerate
Sedimentary
Turquoise (Blue Howlite / Magnesite imitation)
CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)
mineral
Ferruginous Quartz (Iron-stained Quartz)
Quartz with Iron Oxide inclusions (SiO2 with Fe2O3)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
River Cobble (Phyllite or Quartzite)
Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)
metamorphic
Pebble (river rock/beach pebble)
Pebble (clast size class)
Sedimentary Rock
Pebble (likely Quartz or Chert)
SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.
Sedimentary Rock
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Chrysoprase
Chrysoprase (a variety of Chalcedony, SiO₂)
Mineral
Geodude
Geodude (Rock Pokémon: No. 74)
igneous
Quartz Geode (partially formed/chalcedony with iron staining)
Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides
Mineral/Sedimentary Rock Feature
Bloodstone Jasper (Heliotrope)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
sedimentary
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Dalmation Jasper (Dalmation Stone)
Perthitic feldspar-quartz-amphibole rock
igneous
Veined Pebble (likely a Quartz-Veined Pebble)
Pebble with Mineral Vein (e.g., Quartz Vein in a Chert/Mudstone Pebble)
Sedimentary Rock (possibly conglomerate or breccia with a quartz vein)
Diamond
Diamond (C)
Mineral
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Sandstone (Ferruginous)
Arenite (variable SiO2 with Fe2O3 staining)
sedimentary
Granite
Granite (a common name for a felsic intrusive igneous rock)
Igneous Rock
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Iron Oxide staining)
sedimentary
Quartz
Silicon Dioxide (SiO2)
Mineral
Breciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Sandstone with trace fossil
Sandstone, possibly with Skolithos or similar trace fossil
sedimentary
Basalt with Desert Varnish
Mafic Volcanic Rock (Fe/Mg rich Silicate)
igneous