Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
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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Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Feldspathic Gneiss (Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Porphyritic Rhyolite or Andesite (Porphyry)
Porphyritic igneous rock (Composition depends on exact mineralogy, often Rhyolite or Andesite)
igneous
Limonite-stained Granite
Felsic Plutonic Rock with Hydrated Iron Oxides
igneous
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rhyolite
Rhyolite (Extrusive Igneous Rock)
igneous
Vesicular Basalt / Scoria (Stream-rounded Cobble)
Mafic extrusive igneous rock
igneous
Sandstone (Fossiliferous)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Quartz (Variety: Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Diorite (Spotted or Dalmatian Stone pattern)
Diorite
igneous
Basalt with Epidote (Porphyritic Basalt)
Mafic Porphyritic Basalt with (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) inclusions
igneous
Granodiorite
Granodiorite (intermediate plutonic rock)
igneous
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
sedimentary
Granite Pebble
Granite (Plutonic Igneous Rock)
igneous
Pink Granite
Phaneritic plutonic rock (dominated by Alkali Feldspar)
igneous
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Sunstone (Feldspar)
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8 with inclusions of Hematite/Goethite
mineral
Serpentine Jade (New Jade/Olive Jade)
Serpentinite (a rock composed primarily of serpentine minerals) / Mg3Si2O5(OH)4 for Antigorite and Lizardite
Mineral
Sandstone
Arenite
sedimentary
Gneiss
Banded Metamorphic Rock (Gneiss)
metamorphic
Granite Cobble / Gneiss (River Rock)
Granitic Gneiss / Felsic Igneous Rock
igneous
Gneiss (specifically Biotite Gneiss)
Gneiss (high-grade metamorphic rock primarily composed of Silicates)
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Basalt
Extrusive Igneous Rock
igneous
Obsidian
Volcanic Glass (SiO2 + impurities)
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Lapis Lazuli
Rock composed mainly of lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), calcite, and pyrite
metamorphic
Basalt
Basalt (Mafic igneous rock)
igneous
Granite
Granite (composed mainly of Quartz, Feldspar, and Mica)
igneous
Quartz (likely Clear Quartz or Rock Crystal)
Quartz (SiO2)
Mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Pink Gneiss / Pink Granite Gneiss
Felsic Gneiss (dominated by Orthoclase Feldspar and Quartz)
metamorphic
Granite Tile (Commercial Granite)
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
igneous
Pink Granite
Granite (enriched in Potassium Feldspar)
igneous
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Basalt
Basalt (Aphanitic Mafic Volcanic Rock)
Igneous
Basalt Pebble
Extrusive Igneous Rock
igneous
Basalt
Basalt (Mafic Extrusive)
igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic