Honey Calcite
Calcium Carbonate (CaCO3)
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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Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Tumbled or naturally etched mica-rich mineral specimen, likely muscovite
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂; possibly phlogopite mica
mineral
Garnet (specifically Almandine or Pyrope)
Almandine: Fe3Al2(SiO4)3 or Pyrope: Mg3Al2(SiO4)3
mineral
Quartz / Agate Nodule
Silicon Dioxide (SiO2)
mineral
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Sandstone
Arenite
sedimentary
Parti Sapphire
Corundum (Al2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Garnet Schist
Almandine-Mica Schist
metamorphic
Milky Quartz Nodule / Geode precursor
Silicon Dioxide (SiO2)
mineral
Tourmaline
Schorl (Complex boron silicate, NaFe3Al6(Si6O18)(BO3)3(OH)4)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sapphire
Corundum (Al2O3)
gemstone
Chalcedony (specifically Common Opal or Agate variant)
Silicon Dioxide (SiO2)
mineral
Banded Schist
Mica Schist
metamorphic
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2) with Hematite/Limonite
mineral
Quartz
Quartz (SiO₂)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Blue Agate Slice
Chalcedony (SiO2)
gemstone
Tumbled Agate
Silicon Dioxide (Quartz variety: Chalcedony)
gemstone
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Epidote with Quartz Vein
Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Lapis Lazuli
Rock composed mainly of lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), calcite, and pyrite
metamorphic
Labradorite
(Ca,Na)(Al,Si)4O8 (Sodic-calcic plagioclase feldspar)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Quartzite (Gold/Tan River Cobble)
Quartzite (composed primarily of crystalline SiO2)
metamorphic
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sandstone (Water-worn Cobble)
Arenite (SiO2 based)
sedimentary
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
Basalt (River Pebble)
Basalt (Mafic Extrusive Igneous Rock)
igneous
Granitic Gravel Piece
Granite (Felsic Plutonic Rock / SiO2 with Al2O3, K2O, Na2O)
igneous
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic