Vesicular Basalt / Scoria (Stream-rounded Cobble)
Mafic extrusive igneous rock
igneous
Category
Mineral In Igneous Rock
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
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Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
igneous
Diorite
Intermediate plutonic igneous rock
igneous
Granite (Giallo Ornamental / Venetian Gold)
Granite (composed mainly of Quartz, Feldspar, Biotite, and Garnet)
igneous
Granite Gravel / Crushed Granite
Plutonic Felsic Igneous Rock
igneous
Weathered granite (likely pink biotite granite)
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
igneous
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Granite Gneiss
Granitic Gneiss
Metamorphic
Quartz Vein in Host Rock
Quartz (SiO2) in Mafic or Sedimentary Matrix
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive Felsic Igneous Rock
igneous
Potassium Feldspar (Microcline / Orthoclase)
KAlSi3O8
mineral
Pebble (likely Sandstone or Granitic Pebble)
Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)
Rock (likely Sedimentary)
Feldspar (Plagioclase / Orthoclase)
KAlSi3O8 / CaAl2Si2O8 - NaAlSi3O8
mineral
Feldspar
Feldspar (Orthoclase/Microcline)
mineral
Granite (with Quartz and Mica)
Phaneritic Felsic Igneous Rock
igneous
Quartz (Milky / Clear Quartz Fragment)
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Red Granite
Felsic Intrusive Igneous Rock
igneous
Granite
Felsic Intrusive Igneous Rock
igneous
Granite Pebble
Phaneritic Felsic Igneous Rock
igneous
Vesicular Basalt (or Scoraceous Basalt)
Basalt (Vesicular texture)
igneous
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Granite
Intrusive Felsic Igneous Rock
igneous
Granite
Granite (felsic intrusive igneous rock)
igneous
Banded Sandstone (Water-worn Pebble)
Arenite with mineral banding
sedimentary
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
igneous
Granite Pebble
Granite (Plutonic Igneous Rock)
igneous
Wishing Stone (Quartz-veined Porphyritic Basalt)
Igneous rock with quartz vein (SiO2)
igneous
Banded gneiss
Foliated gneiss, likely quartz–feldspar–mica gneiss
metamorphic
Granite
Felsic intrusive igneous rock
igneous
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Granite Pebbles
Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8), and Mica)
igneous
Porphyritic Igneous Rock with Iron Oxide Weathering
Weathered Porphyry (containing Quartz, Feldspar, Amphibole/Biotite, and Hematite/Limonite)
igneous
Granite (River Pebble)
Phaneritic intrusive igneous rock (Felsic)
igneous
Basalt with Quartz/Calcite vein
Basalt (Mafic Igneous Rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous