Basalt Scoria
Vesicular Basalt
igneous
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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Amygdaloidal Basalt
Vesicular Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)
igneous
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Blue Dumortierite Quartz
Dumortierite in Quartz (AlAl6BSi3O12(O,OH)3)
mineral
Epidosite (Epidote-Quartz rock)
Epidote-rich hydrothermal rock
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Mica-rich Sandstone or Micaceous Schist Weathering
Micaceous Schist (Muscovite-Quartz composition)
Metamorphic or Sedimentary depending on local grade
Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic plutonic rock (Quartz, Alkali Feldspar, and Plagioclase)
igneous
Chrysoprase
Chalcedony (Silicon Dioxide, SiO2), flavored by Nickel
mineral
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Aluminum borate silicate)
mineral
Veined Limestone (Micrite) with Quartz/Calcite Veins
Calcium Carbonate (CaCO3) with Silicate or Carbonate inclusions
sedimentary
Granite
Intrusive Igneous Rock
igneous
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Pumice
Pumicite / Vesicular Rhyolite
igneous
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Basalt
Basalt (a mafic extrusive igneous rock)
Igneous
Quartz pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone Pebble
Arenite (SiO2 based)
sedimentary
Polished Black Obsidian
Volcanic Glass (70-75% SiO2)
igneous
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Granite
Course-grained intrusive igneous rock
igneous
Dendritic Agate
Dendritic Agate (Silicon Dioxide with Manganese or Iron Oxide inclusions, SiO2)
mineral
Vesicular Basalt (or Scoraceous Basalt)
Basalt (Vesicular texture)
igneous
Quartz (Smoky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
mineral
Diorite (Dalmatian Stone variant)
Intermediate Phaneritic Igneous Rock
igneous
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Greenstone
Metabasalt / Greenschist facies rock
Metamorphic
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Scoria
Vesicular Basalt / Scoria
igneous
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Druzy Quartz on Chert/Chalcedony
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite River Rock
Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)
igneous
Scoria (Lava Rock)
Scoria (Vesicular Basaltic Rock)
Igneous
Diorite
Diorite (intermediate intrusive igneous rock)
igneous
Pyrope Garnet
Magnesium aluminum silicate (Mg3Al2Si3O12)
mineral
Spinifex Texture Komatiite
Komatiite (Ultramafic Volcanic Rock)
igneous