Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Category
Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite)
Browse mineral like byproduct (often mistaken for igneous rock or meteorite) specimens identified by the Rock Identifier community.
Learn about Mineral Like Byproduct (Often Mistaken For Igneous Rock Or Meteorite) in the encyclopedia
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Sunstone
Aventurine Feldspar (Plagioclase Feldspar with inclusions)
mineral
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Milky Quartz with inclusions
Silicon Dioxide (SiO2)
mineral
Copper Ore with Chrysocolla and Azurite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)
mineral
Quartz Geode/Cluster
Quartz (SiO2)
mineral
Labradorite (likely Black Labradorite or Larvikite)
Labradorite (Na,Ca)(Al,Si)4O8. If a rock, it is typically anorthosite, gabbro, or norite, or a variety of syenite called Larvikite if it is specifically from Larvik, Norway.
Mineral/Igneous Rock
Concretion
Siderite or Ironstone Concretion
sedimentary
Chert with Quartz Vein
Microcrystalline Quartz (SiO2) with Macrocrystalline Quartz
sedimentary
Milky Quartz (with Iron Oxide staining)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Schist
Schist
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
gemstone
Granite Gravel (Pebble)
Intrusive Felsic Igneous Rock
igneous
Garnet (Red Garnet)
Garnet Group. The red varieties seen in jewelry are typically Almandine (Fe3Al2(SiO4)3), Pyrope (Mg3Al2(SiO4)3), or a mix of the two (pyrope-almandine series).
Mineral (specifically, a variety of the mineral species Pyrope-Almandine Garnet)
Blue Quartzite
Metamorphosed Quartz (SiO2) with inclusions
metamorphic
Granite
Phaneritic high-silica plutonic rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Ferruginous Sandstone
Sandstone with Iron Oxide (Limonite/Goethite)
sedimentary
Magnetite (or Magnetic Iron Ore)
Magnetite (Fe3O4)
mineral
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Greenstone
Greenschist / Greenstone (Chlorite-Epidote facies)
metamorphic
Greenschist (or Serpentinite) with Quartz-Feldspar Vein
Metabasalt / Greenschist Facies Rock
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8
mineral
Yellow Sapphire (Raw)
Corundum (Al2O3)
mineral
Gabbro
Gabbro
igneous
Tree Agate
Chalcedony with Dendritic Chlorite (SiO2 with impurities)
sedimentary/mineral
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Gneiss (with Quartz and Mica)
Gneiss
metamorphic
Quartz with Mica
Silicon Dioxide (SiO2) with Mica group inclusions
mineral
Gneiss with Quartz Vein
Gneiss containing Quartz (SiO2) filler
metamorphic
Pink Granite
Phaneritic intrusive igneous rock (K-feldspar rich)
igneous
Basalt
Basalt
igneous
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Granite (Weathered)
Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Quartz Geode
Crystalline Silver Oxide (SiO2) in Calcareous Host
mineral