Garnet Gneiss
Gneiss containing almandine-pyrope garnet
metamorphic
Category
Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites)
Browse industrial byproduct (often confused with igneous rocks or meteorites) specimens identified by the Rock Identifier community.
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Green Fluorite
Calcium Fluoride (CaF2)
mineral
Basalt
Basalt (dominated by plagioclase feldspar, pyroxene, and olivine)
igneous
Quartzite with inclusions
Quartzite (SiO2)
metamorphic
Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Basalt
Basalt (extrusive volcanic rock)
igneous
Milky Quartz Mushroom Carving
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Iron-stained or Rose variant)
Silicon Dioxide (SiO2)
mineral
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Fluorite in Matrix
Calcium Fluoride (CaF2) with Quartz/Calcite matrix
mineral
Cobblestones (Basalt/River Rock)
Polished lithic fragments and rounded pebbles
sedimentary
Limestone with possible fossil inclusions
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
gemstone
Hematite
Iron(III) oxide (Fe2O3)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Granite
Granite
igneous
Basalt
Aphanitic Mafic Igneous Rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Agate
Silicon Dioxide (SiO2)
gemstone
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz
SiO2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Chalcedony / Yellow Agate
Silicon Dioxide (SiO2)
mineral
Amethyst and Calcite collection
Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
White Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Tan)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Carnelian (Orange Chalcedony)
Silicon dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Tumbled Clear Quartz and Citrine Points
Silicon Dioxide (SiO2)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Tumbled pink feldspar (likely orthoclase or microcline)
Potassium feldspar, KAlSi₃O₈
mineral