Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Category
Anthropogenic (Man Made Material Processed By Nature)
Browse anthropogenic (man made material processed by nature) specimens identified by the Rock Identifier community.
Learn about Anthropogenic (Man Made Material Processed By Nature) in the encyclopedia
View all →
Polished blue sodalite cabochons
Sodalite, Na₈Al₆Si₆O₂₄Cl₂
mineral
Citrine Quartz
Quartz (SiO2) - specifically, a variety of macrocrystalline quartz
Mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Polished blue chalcedony (likely blue quartz/chalcedony)
Microcrystalline quartz, SiO₂; blue color commonly from inclusions or coloration
gemstone
Diamond (in Jewelry Setting)
Carbon (C)
gemstone
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Chert (Flint)
Chert (Cryptocrystalline silicon dioxide, SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Smooth river pebble
Indeterminate lithology; likely fine-grained quartz-rich sandstone, siltstone, or weathered chert
sedimentary
Serpentinized ultramafic rock with magnesite
Serpentinite, chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with likely magnesite (MgCO₃) and minor chromite/magnetite
metamorphic
Unakite-like granite with a white feldspar inclusion
Granite, chiefly quartz–feldspar–biotite; pale inclusion likely albite/orthoclase feldspar
igneous
Yellow chalcedony (likely lemon quartz or citrine)
Cryptocrystalline silica, SiO₂; possible quartz variety
mineral
Weathered fossiliferous limestone
Bioclastic limestone, chiefly calcite (CaCO₃)
sedimentary
Basalt
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine
igneous
Worked chert (likely flint)
Microcrystalline quartz/chalcedony, SiO₂
sedimentary
Porphyritic rhyolite (likely lithophysal/vesicular rhyolite)
Rhyolite; chiefly quartz and alkali feldspar, with minor plagioclase and iron-bearing minerals
igneous
Red Painted Rock
Artificial Coated Lithic Fragment
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Weathered fossiliferous limestone fragment, possibly fossil coral or shell material
Indeterminate carbonate fossil in calcitic limestone; likely composed mainly of calcite (CaCO₃), but species identification is not possible from this image alone
fossil
Quartz-rich pegmatite with green mica or chlorite
Granitic pegmatite; chiefly quartz (SiO₂), with feldspar and probable muscovite/chlorite
igneous
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Diamond (Princess Cut)
Carbon (C)
gemstone
Quartz
Quartz (SiO₂)
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Costume Jewelry Gemstones (Emerald-imitation and semi-precious beads)
BeCuAl6Si6O18 (Beryl structure), frequently simulated by glass or synthetic spinel
mineral
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Cinnabar in Quartz
Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions
Mineral
Slate
Metamorphic Rock (Fine-grained)
metamorphic
Gray Granite
Phaneritic plutonic rock (Granite)
igneous
Citrine
Quartz (SiO₂)
Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Banded Agate (Dyed / Polished)
Microcrystalline Quartz (SiO2)
mineral
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Pink Granite
Granite (Phaneritic igneous rock rich in Alkali Feldspar)
igneous
Calcite
Calcium Carbonate (CaCO3)
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Chert Nodule (River Cobble)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Rough Corundum (Sapphire/Ruby mixture)
Corundum (Aluminum Oxide, Al2O3)
mineral
Diamond (Colorless/White)
Carbon (C)
mineral