Ruby (Faceted)
Corundum (Al2O3:Cr)
gemstone
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.
Learn about Industrial Byproduct (Often Confused With Igneous Rocks Or Meteorites) in the encyclopedia
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Fluorite
Calcium Fluoride (CaF2)
mineral
Garnet Schist
Almandine-Muscovite Schist
metamorphic
Greenstone
Chlorite schist / Meta-basalt
metamorphic
Basalt
Mafic Volcanic Rock (primarily Plagioclase and Pyroxene)
Igneous
Citrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Carnelian Agate
Carnelian (Silicon Dioxide - SiO2)
mineral
Aventurine
Quartz with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Fluorite in Matrix
Fluorite (CaF2) within a host rock matrix
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Yellow Quartzite (Onyx Pebble)
Silicon Dioxide (SiO2) - Quartzite
metamorphic
Gneiss
Metamorphic rock (Gneiss)
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Metamorphic Cobble)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Jasper (Iron-stained Chalcedony)
SiO2 with Fe2O3 (Iron Oxide) impurities
Sedimentary / Mineral (Silica)
Biotite on Matrix
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Fancy Jasper
Agate (Silicon Dioxide, SiO2)
sedimentary
Amethyst
Silicon Dioxide with iron impurities (SiO2)
mineral
Smoky Quartz (with inclusions)
Silicon Dioxide (SiO2)
mineral
Fluorite Tower
Calcium Fluoride (CaF2)
mineral
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Gneiss
Gneiss
metamorphic
Chert Nodule (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Clear Quartz (Herkimer Diamond variant)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Schist
Chlorite-Mica Schist
metamorphic
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Greenschist
Greenschist facies metamorphic rock
metamorphic
Banded Agate (Yellow Agate)
Silicon Dioxide (SiO2)
mineral