Granitoid
Granitoid (comprising Quartz, Feldspar, and Mica/Amphiboles)
Category
Browse granite specimens identified by the Rock Identifier community.
Granitoid
Granitoid (comprising Quartz, Feldspar, and Mica/Amphiboles)
Rose Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Biotite on Quartz Matrix
Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)
Quartz (Smoky/Milky variety with inclusion)
Silicon Dioxide (SiO2)
Quartz (Milky or Druzy variety)
Silicon Dioxide (SiO2)
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
Quartz (Smoky/Milky)
Silicon Dioxide (SiO2)
Smoky Quartz in Matrix (Pegmatite)
Silicon Dioxide (SiO2) with Potassium Feldspar and Biotite mica
Amazonite
Amazonite (KAlSi3O8, a triclinic variety of Potassium Feldspar)
Rhyolite Porphyry
Rhyolite (High-silica volcanic rock)
Arkosic Sandstone
Arkose (Clastic Sedimentary Rock)
Garnet Rhyolite
Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet
Red Rhyolite Porphyry
Rhyolite (Porphyritic texture)
Citrine Quartz
Silicon Dioxide (SiO2) - Ferric Iron impurities
Quartz (Granular Milky Quartz fragment)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Smoky Quartz
Silicon Dioxide (SiO₂)
Milk Quartz (Common White Quartz)
Quartz (Silicon Dioxide, SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Granitic Pegmatite
Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8, Mica: KAl2(AlSi3O10)(OH)2)
Marble
Recrystallized Calcite (CaCO3)
Diorite
Diorite (Intermediate intrusive igneous rock)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Fluorite and Red Jasper
Fluorite (Calcium Fluoride, CaF2) and Red Jasper (Silicon Dioxide, SiO2)
Quartz (Smoky/Milky variety with matrix)
Silicon Dioxide (SiO2)
Quartz / Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Amethyst
Amethyst (variety of Quartz, SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Milky Quartz Cobble
Silicon Dioxide (SiO2)
Magnetite
Magnetite (Fe3O4)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Gneiss (specifically Banded Gneiss)
Gneiss
Quartz (Milky or Common Quartz)
Silicon Dioxide (SiO2)
Milky and Ferruginous Quartz
Silicon Dioxide (SiO2)
Quartz (Milky or Citrine-leaning)
Silicon Dioxide (SiO2)