Epidote
Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
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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Migmatite
Migmatite (Mixed Rock)
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Small pale mineral fragment
Unidentified; possibly quartz, calcite, or feldspar
mineral
Basalt
Basalt
igneous
Cullet Glass (Industrial Slag Glass)
Amorphous Silica (SiO2) with metallic oxide impurities
Man-made byproduct (often mistaken for Obsidian or Emerald)
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Magnetite
Magnetite (Fe3O4)
Mineral
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Agate (specifically a Blue Agate Geode Slice)
Chalcedony (cryptocrystalline variety of Quartz); SiO2
mineral
Pyrite
Pyrite (Iron sulfide, FeS₂)
mineral
Garnet (specifically Almandine or Pyrope)
Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Yooperlite
Fluorescent Sodalite-bearing Syenite
igneous
Basalt
Mafic volcanic rock (dominated by Plagioclase and Pyroxene)
igneous
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Granitoid (Granitic Rock)
Granitoid (Quartzo-feldspathic plutonic rock)
igneous
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Pumice
Pumice (volcanic glass formed of highly vesicular rough textured rock)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Bauxite
Aluminium ore / Hydrated aluminium oxides (AlOx(OH)3-2x)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Amethyst (Purple), Sulfur (Yellow), and Blue Apatite
SiO2 (Quartz), S (Native Sulfur), Ca5(PO4)3(F,Cl,OH) (Apatite Group)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite)
Metamorphic rock
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Basalt Pebble
Basalt
igneous
Sodalite (Sunset Sodalite)
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral