Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia
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Limonite/Goethite on Shale
Hydrous ferric oxides (FeO(OH)·nH2O) often associated with argillaceous rock
sedimentary
Sandstone
Arenite
sedimentary
Howlite (Dyed to resemble Turquoise)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Sandstone (Ferruginous)
Arenite with iron oxide cement (Fe2O3)
sedimentary
Turquoise and Hematite
Turquoise: CuAl6(PO4)4(OH)8·4H2O; Hematite: Fe2O3
mineral
Malachite
Malachite (Copper Carbonate Hydroxide) - Cu2CO3(OH)2
Mineral
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Liesegang Banded Sandstone (Wonderstone)
Ferruginous Sandstone with Liesegang Rings
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)
sedimentary
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Mineral
Diorite (River Pebble)
Diorite
igneous
Banded Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Chert (Flint with Iron Staining)
Silicon Dioxide (SiO2)
sedimentary
Limonite (Yellow Ochre)
FeO(OH)·nH2O (Hydrous iron(III) oxide-hydroxide mixture)
Mineral (Iron Ore)
Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Granular variety)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz (Sunstone-like Chalcedony)
Silicon Dioxide (SiO2)
mineral
Greenstone with Quartz Veining
Epidiorite or Metabasalt with SiO2 (Quartz) veins
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon dioxide (SiO2)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Quartzite)
Silicon Dioxide (SiO2)
mineral
Greenstone
Metabasalt / Greenstone
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony / Quartz Variety
Mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
metamorphic
Himalayan Pink Salt
Halite (NaCl) with trace minerals
mineral
Himalayan Pink Salt
Halite (NaCl) with trace minerals
mineral
Blue Lace Agate
Chalcedony (SiO2) with trace minerals
mineral
Geode (Unopened)
Crystalline Quartz or Chalcedony filled Geode (SiO2)
sedimentary
Magnetite
Magnetite (Fe3O4)
Mineral
Gossan
Iron-rich regolith (mainly Limonite and Goethite, FeO(OH)·nH2O)
sedimentary