Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Category
Organic Gemstone (Not A Rock Or Mineral In The Traditional Sense, But Bio Mineralized Material)
Browse organic gemstone (not a rock or mineral in the traditional sense, but bio mineralized material) specimens identified by the Rock Identifier community.
Granitic Quartz with Feldspar
Granite (composed primarily of SiO2 and KAlSi3O8)
igneous
Quartz Mica Schist
Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)
metamorphic
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Mineral
Quartz
Quartz (SiO₂)
Mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Mixed Gemstone Beaded Jewelry
Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)
Mineral
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone (Quartz-rich)
Clastic sedimentary rock (SiO2 primary)
sedimentary
Sandstone (likely Arkosic or Quartzose)
Sandstone (SiO2 with inclusions)
sedimentary
Sandstone (likely Quartzose)
Arenite (primarily SiO2)
sedimentary
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Snowflake Obsidian
Volcanic glass containing Spherulitic Cristobalite (SiO2)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Ferruginous Sandstone
Ferruginous Clastic Sedimentary Rock
sedimentary
Chert (Flint Nodular)
Chert (Silicon dioxide, SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 cement)
sedimentary
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Flagstone (Sandstone)
Clastic Sedimentary Rock (composed of quartz and feldspar)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) within a geode
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2)
mineral
Granodiorite / Granite
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
River Stone (likely Mudstone or Siltstone)
Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)
sedimentary
Banded Sandstone (Wonderstone)
Sandstone with Liesegang Rings (SiO2 with Iron Oxides)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Olivine
Olivine group (Mg, Fe)2SiO4
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Quartzite or Massive Quartz)
Silicon Dioxide (SiO2)
Mineral
Brecciated Chert
Sedimentary Chert (SiO2) with Calc-Silicate mineralization
sedimentary
Diamond (Macled/Crystal fragment)
Carbon (C), isometric crystal system
mineral
Quartz / Quartzite
Quartz (Silicon Dioxide, SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite (SiO2 with Iron Oxide impurities)
sedimentary
Sandstone Pebble
Arenite (primarily Quartz, SiO2)
sedimentary
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Anthropogenic (Man-made)
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Synthetic Wolf Plush (Non-mineral)
Canis lupus similis (Prop material: Polyester & Synthetic fibers)
Synthetic material/Textile
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Schist
Crystalline Metamorphic Rock (Schistose)
metamorphic
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)