Landscape Boulder / River Rock
Granitic or Quartzite Rock
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.
Learn about Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite) in the encyclopedia
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Ferruginous Sandstone Concretion (Ironstone Phosphorite)
Ferruginous Sandstone (variable Fe-oxide/hydroxide composition)
sedimentary
Blue Quartz (or Blue Aventurine)
Silicon Dioxide (SiO2) with inclusions (typically Crocidolite or Dumortierite)
mineral
Fossil Brachiopod
Phylum Brachiopoda
fossil
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (or Porphyritic Scoria)
Vesicular Basalt
igneous
Chrysoprase
Silicon dioxide with nickel impurities (SiO2 + Ni)
mineral
Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Dumortierite Quartz
Al7BO3(SiO4)3O3 (inclusion in SiO2)
mineral
Gneiss
Metamorphic rock (Gneiss)
metamorphic
Quartzite (Gold-toned)
Crystalline Quartz Metamorphite (SiO2)
metamorphic
Dalmatian Stone
Dalmatian Jasper (Aplitic Rock)
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins
Altered mafic rock or Epidosite
metamorphic or igneous alteration
Basalt Pebble
Basaltic Igneous Rock
igneous
Epidote (Unakite component) / Green Quartzite
Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Fuchsite Quartzite (Green Aventurine in raw form)
Metamorphic Quartzite (SiO2) with Mariposite/Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Moldavite
Moldavite (Siliceous vitreous substance)
tektite (natural glass)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Dalmatian Stone
Peralkaline igneous rock containing quartz, feldspar, and arfvedsonite
igneous
Basalt
Basalt
Igneous
Rhyolite with Agate/Quartz Vugs
Rhyolite (Volcanic Rock) containing SiO2 (Silica) vugs
igneous
Basalt (Vesicular)
Extrusive igneous rock with vesicular texture
igneous
Likely hematite-rich ironstone or metallic mineral fragment
Hematite (Fe₂O₃), possibly with magnetite (Fe₃O₄) or metallic iron
mineral
Basalt with Vesicular Amygdule
Extrusive igneous rock (Mafic)
igneous
Quartzite
Metamorphosed Sandstone (SiO2)
metamorphic
Basalt (Greenstone/Water-worn Pebble)
Basalt (containing Chlorite/Epidote)
igneous
Weathered iron-rich rock, possibly laterite or limonite-bearing sandstone
Laterite/limonite-rich material; commonly dominated by goethite (FeO(OH)) and hydrated iron oxides
sedimentary
Scoria
Vesicular Basalt / Scoriaceous Basalt
igneous
Chalcopyrite
Chalcopyrite (CuFeS2)
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Peridot
Olivine ((Mg, Fe)2SiO4)
mineral
Carborundum (Silicon Carbide)
Silicon Carbide (SiC) / Moissanite (natural form)
mineral
Tektite (Indochinite)
Tektite (Amorphous Silica Glass), SiO2(Al2O3)
igneous
Green Quartzite Pebble
Quartzite (SiO2 with chlorite/fuchsite inclusions)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic