Blue Sapphire
Corundum (Al2O3)
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.
Learn about Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite) in the encyclopedia
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Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Shale
Shale (Lutite)
sedimentary
Raw Quartz
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone
Peralkaline rhyolite with arfvedsonite inclusions
igneous
Sandstone
Clastic Sedimentary Rock
sedimentary
Greenstone
Greenschist / Greenstone (Epimetamorphic Rock)
metamorphic
Scoria (Lava Rock)
Scoria (Mafic Volcanic Rock)
igneous
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
man-made composite (lithified equivalent of sedimentary)
Yellow Agate
Silicon Dioxide (SiO2)
mineral
Granite Gneiss
High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)
metamorphic
Pahoehoe Basalt
Extrusive mafic volcanic rock
igneous
Blue Apatite
Apatite Group (Ca5(PO4)3(F,Cl,OH))
mineral
Greenstone / Greenschist
Greenschist facies metamorphic rock (composed primarily of chlorite, actinolite, and epidote)
metamorphic
Conglomerate
Conglomerate (Sedimentary Rock)
sedimentary
Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)
Quartz (SiO₂)
Mineral
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Granite (with Almandine Garnet inclusions)
Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)
igneous
Mica Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Banded Gneiss
Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)
metamorphic
Granite
Phaneritic Felsic Igneous Rock
igneous
Corundum (Sapphire variant)
Aluminum Oxide (Al2O3)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Sandstone (likely Siltstone or Mudstone)
Clastic sedimentary rock (primarily SiO2 with various oxides)
sedimentary
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
sedimentary
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Druzy Quartz on Chalcedony Matrix
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granodiorite Pebble
Granodiorite
igneous
Pumice
Pumice (a highly vesicular amorphous silicate glass)
igneous
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Sandstone (Painted)
Arenite (primarily SiO2)
sedimentary
Pink Granite
Granite (Alkali Feldspar Granite)
igneous
Basalt
Vesicular Basalt
igneous
Basalt
Extrusive Igneous Rock
igneous
Diorite
Diorite (Intermediate Plutonic Rock)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Basalt with Phenocrysts
Extrusive Igneous Rock
igneous
Sandstone (Calcareous/Lithic)
Sedimentary Rock (Clastic Sandstone with Calcium Carbonate cement)
sedimentary
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
mineral