Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Category
Mineral Pseudomorph
Browse mineral pseudomorph specimens identified by the Rock Identifier community.
Learn about Mineral Pseudomorph in the encyclopedia
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Shale with Pyrite
Clastic sedimentary rock containing Iron Disulfide (FeS2)
sedimentary
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
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Limonite (Hydrated Iron Oxide / Bog Iron)
FeO(OH)·nH2O
Mineral (Sedimentary context)
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
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
Petrified Wood
Silicified wood (primarily quartz, SiO2)
sedimentary
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock)
igneous
Jadeite
NaAlSi2O6; Jadeite silicate mineral
metamorphic
Polished/tumbled jasper, likely ocean jasper or brecciated jasper
Jasper: microcrystalline quartz (SiO₂) with iron oxides and other silicate impurities
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Fossilized Echinoid (Sea Urchin) or Brachiopod
Echinoidea / Invertebrate Fossil
fossil
Weathered banded sandstone pebble
Quartz-rich sandstone (predominantly SiO₂)
sedimentary
Gneiss
Gneiss (Metamorphic high-grade)
metamorphic
Wollastonite
Calcium Inosilicate Mineral, CaSiO3
mineral
Mica (Biotite or Phlogopite Buchsam)
Silicate Mineral (Phyllosilicate family)
mineral
Spherulitic Agate / Moss Agate
Chalcedony (SiO2) with mineral inclusions
mineral
Dendritic Agate or Moss Agate Nodules (Septarian-like)
Chalcedony with mineral inclusions (SiO2)
sedimentary
Vesicular Basalt (Amygdaloidal Basalt)
Basalt with Secondary Mineral Inclusions
igneous
Pearl
Organic Mineral (CaCO3 with conchiolin)
mineral
Chert (Jasper variation)
Chert (Silicate mineral, SiO2)
sedimentary
Banded Gneiss
Gneiss (variable mineral composition)
metamorphic
Jasper
Jasper (Silicate mineral, SiO2)
sedimentary
Aragonite
Aragonite (Carbonate mineral), CaCO3
mineral
Jasper
Jasper (Silicate mineral, SiO2)
sedimentary
Sandstone (likely Quartzose)
Arenite (SiO2 principal mineral)
sedimentary
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Carnelian
Carnelian (Silicate mineral, SiO2)
mineral
Amethyst
Amethyst (Silica mineral, SiO2)
mineral
Sandstone
Sandstone (various mineral compositions)
Sedimentary
Amygdaloidal Basalt
Basalt with secondary mineral infilling
igneous
Red Jasper
Jasper (Silicate Mineral - SiO2)
sedimentary