Granodiorite (Riverbed Cobble)
Granodiorite
igneous
Category
Granite
Browse granite specimens identified by the Rock Identifier community.
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Granitic Pegmatite
Granitic Pegmatite with Quartz and Feldspar
igneous
Plagioclase Feldspar
NaAlSi3O8 – CaAlSi2O8 (Sodium-Calcium Aluminum Silicates)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Ferruginous Quartzite (also known as Ironstone or Gossan)
Ferruginous Quartzite with Goethite/Hematite staining
metamorphic
Smoky Quartz
SiO2 (Silicon Dioxide)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Rhyolite
Rhyolite (High-silica volcanic rock)
igneous
Obsidian (in jewelry setting)
Volcanic Glass (Amorphous Silica)
igneous
Quartzite Pebble (River Rock)
Quartzite (SiO2)
metamorphic
Porphyritic Rhyolite
Rhyolite
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Garnet (Almandine/Pyrope)
Silicate Mineral (Group: X3Y2(SiO4)3 where X=Mg, Fe, Mn and Y=Al, Fe, Cr)
mineral
Quartz nodule (River pebble)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (specifically Granitic Gneiss)
Gneiss
metamorphic
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Grain
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Biotite (Black Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral