Quartz Geode
Silicon Dioxide (SiO2)
mineral
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
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Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Olivine Phenocrysts
Aphanitic Mafic Volcanic Rock (Basalt)
igneous
Collection of Minerals and Ores
Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)
mineral
Serpentinite
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Quartz (Beach Pebble)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (clastic sedimentary rock)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Greenstone
Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote
metamorphic
Pumice
Vesicular volcanic glass (primarily Alumino-silicates)
igneous
Serpentinite (often called Jade or Nephrite substitute)
Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)
metamorphic
Pumice
Vesicular volcanic glass (primarily SiO2)
igneous
Pumice
Pumice (Volcanic Rock)
igneous
Agate in Rhyolite
Silicon Dioxide (Quartz/Chalcedony) in Volcanic Rock matrix
igneous
Quartz (Agate/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Greenschist (Greenstone)
Chlorite Schist / Greenschist Facies Rock
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Ruby
Corundum (Al2O3)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Granite
Phaneritic Plutonic Felsic Rock (SiO2 > 69%)
igneous
Granitic Quartz with Feldspar
Granite (composed primarily of SiO2 and KAlSi3O8)
igneous
Granite / Diorite
Intrusive Igneous Rock (Granitoid / Diorite)
igneous
Sandstone (Graywacke)
Arenite / Graywacke (SiO2 with lithic fragments)
sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Arfvedsonite with Garnet
Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2
igneous
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz in Matrix
Silicon dioxide (SiO2) within Pegmatite/Gneiss
igneous
Uncertain small pale mineral fragment
Indeterminate; possibly calcite or a light-colored feldspar fragment
mineral
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Botryoidal Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Sandstone (likely Quartz Sandstone)
Arenite (SiO2 based)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Grey River Pebble (Greywacke / Basalt)
Stream-rounded silicate rock pebble
sedimentary
Granite (Alkali-feldspar Granite)
Felsic Plutonic Rock (Primary minerals: Quartz SiO2, Orthoclase KAlSi3O8, Plagioclase (Na,Ca)AlSi3O8)
igneous
Granite (Polished Countertop Surface)
Plutonic Igneous Rock (Felsic)
igneous
Sandstone
Arenite
sedimentary
Sapphire
Corundum (Al2O3)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
sedimentary
Granite
Granite (Plutonic Igneous Rock)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Quartz-Feldspar-Mica)
igneous
Sandstone (River Rock)
Arenite (SiO2 based sedimentary rock)
sedimentary