Granite
Felsic intrusive igneous rock
igneous
Category
Mineral In Igneous Rock
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
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Granite
Felsic intrusive igneous rock
igneous
Quartz (Milky/Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Porphyry (Rhyolite / Andesite Porphyry Pebble)
Porphyritic Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite Cobble
Intrusive Igneous Rock (Felsic to Intermediate)
igneous
Dalmatian Stone
Peralkaline Quartz-Feldspar Porphyry with Arfvedsonite
igneous
Weathered volcanic rock, likely andesite or basaltic-andesite
Fine-grained plagioclase–pyroxene volcanic rock; possible altered andesite (exact identification requires testing)
igneous
Small rounded mineral/rock fragment
Indeterminate; possibly quartz-rich stone or feldspar
mineral
Granite
Felsic intrusive igneous rock
igneous
Magnetite (Lodestone)
Iron(II,III) oxide (Fe3O4)
mineral
Quartz-rich rock, likely granite or quartz-bearing metamorphic rock
Undetermined; possibly granitic rock composed mainly of quartz and feldspar, with mica or other dark minerals
igneous
Basalt with Quartz Veins
Basalt with Quartz or Calcite Veining
igneous
Vesicular Basalt / Scoria pebble
Extrusive igneous rock with amygdaloidal infilling
igneous
Weathered granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspars, and mica
igneous
Blue-gray mineral specimen (possibly sodalite)
Undetermined; appearance may be consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), but the image is insufficient for reliable identification
mineral
Porphyry (Rhyolite or Andesite Porphyry)
Porphyritic Igneous Rock
igneous
Educational Geologic Collection
Mixed Mineral and Rock Collection (Various compositions)
mineral
Granite
Felsic intrusive igneous rock
igneous
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly milky quartz or chalcedony
mineral
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Granite Boulder
Intrusive Igneous Rock
igneous
Banded Igneous Dike Rock
Intrusive igneous rock with felsic/mafic banding
igneous
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Granite
Intrusive Igneous Rock (Felsic)
igneous
Granite
Intrusive Igneous Rock
igneous
Pale greenish quartz-bearing rock, possibly serpentine or altered feldspar
Tentatively serpentinite-related rock (serpentine-group minerals) or altered granitic material; identification is uncertain from the photograph
metamorphic
Likely quartz-rich rock fragment
Indeterminate; possibly quartz-bearing granite or quartzite
igneous
Dalmatian Jasper / Dalmatian Stone
Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)
igneous
Dalmatian Jasper
Microcrystalline Quartz with Arfvedsonite and Tourmaline inclusions
igneous
Granite
Granite (Phaneritic Igneous Rock)
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Dalmation Jasper (or Dalmation Stone)
Dalmation Stone (composed of Perthite, Quartz, and Arfvedsonite)
igneous
Granite
Felsic intrusive igneous rock
igneous
Likely weathered granite or granitic gneiss
Granite: quartz + feldspar + mica; possibly gneiss if the faint texture reflects foliation
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral