Mineral In Igneous Rock

Red Garnet (Pyrope or Almandine)

Garnet Group (A3B2(SiO4)3)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Vesicular Basalt (Lava Rock)

Basalt

Basalt Cobble

Vesicular Basalt (Mafic Extrusive)

Granodiorite

Granodiorite

Quartz (Milky or Clear variety)

Silicon Dioxide (SiO2)

Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)

Quartz (SiO₂)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Flowerstone

Porphyritic Basalt or Porphyritic Andesite

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Granite

Phaneritic Felsic Igneous Rock (Granite)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz River Pebble

Quartz (Silicon Dioxide, SiO2)

Vesicular Basalt

Basalt (Extrusive Mafic Igneous)

Andesite

Intermediate Volcanic Rock (Andesite)

Gneiss

High-grade regional metamorphic rock (Foliated)

Granite

Phaneritic Plutonic Felsic Rock

Pegmatite

Granitic Pegmatite

Gneiss

Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)

Granite

Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Clear Fragment)

Silicon Dioxide (SiO2)

Granite

Felsic Intrusive Igneous Rock (SiO2, Al2O3, K2O, Na2O)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Gneiss (Granitic Gneiss)

Gneiss (from German Gneis, related to 'spark')

Vesicular Basalt (Amygdaloidal)

Amygdaloidal Basalt (Mafic volcanic rock)

Quartz

Silicon dioxide (SiO2)

Gneiss

Metamorphic rock of high-grade regional metamorphism

Milky Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Rough Dark Green Sapphire

Corundum (Al2O3)

Milky Quartz with inclusions

Quartz (Silicon Dioxide, SiO2)

Yellow Apatite Sphere (Polished)

Fluorapatite / Ca5(PO4)3F

Pink Granite

Granite (Phaneritic Quartz-Feldspar Rock)

Pyrite

Iron disulfide (FeS2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Gneiss

Metamorphic Gneiss

Gneiss (specifically a Granitic Gneiss)

Gneiss (typically composed of Quartz, Feldspar, and Mica/Amphiboles)