Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
mineral
Category
Mineral With Artificial Coating
Browse mineral with artificial coating specimens identified by the Rock Identifier community.
Learn about Mineral With Artificial Coating in the encyclopedia
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Garnet Schist
Almandine-Mica Schist
metamorphic
Yellow Ocher (Iron-rich Silt/Clay)
Goethite-rich Limonite (FeO(OH)qnH2O)
sedimentary
Basalt with Epidote (Porphyritic Basalt)
Mafic Porphyritic Basalt with (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) inclusions
igneous
Chert (Flint Nodule)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Microcrystalline quartz (SiO2)
sedimentary
Chert with Quartz Vein
Silicon dioxide (SiO2)
sedimentary
Quartz Veined Diorite or Basalt
Crystalline Silicon Dioxide (Quartz) in Mafic Igneous Host (Basalt/Diorite)
igneous
Fluorite Cleavage Octahedron
Fluorite (Calcium Fluoride, CaF2)
mineral
Calcite on Host Rock
Calcium Carbonate (CaCO3)
mineral
Amazonite
Potassium Feldspar (KAlSi3O8)
Mineral
Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Obsidian
Volcanic Glass (SiO2)
igneous
Fluorite
Calcium Fluoride (CaF2)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Amethyst (Geode Fragment)
Silicon Dioxide with iron impurities (SiO2)
mineral
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Amazonite
Potassium aluminum silicate (KAlSi3O8)
mineral
Petoskey Stone
Hexagonaria percarinata
fossil
Ironstone Concretion
Ironstone (Limonite/Goethite/Hematite mixture)
sedimentary
Dalmation Jasper
Perthitic Feldspar with Arfvedsonite inclusions
igneous
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Siltstone Concretion
Carbonate-cemented Siltstone Concretion
sedimentary
Iron Concretion
Ferruginous concretion (Fe2O3·nH2O / FeO(OH))
sedimentary
Fuchsite in Quartz
Muscovite (KAl2(AlSi3O10)(OH)2) containing Chromium + Quartz (SiO2)
metamorphic
Septarian Nodule
Septarian Concretion (CaCO3 with Siderite/Limonite streaks)
sedimentary
Kidney Stone (Medical Specimen)
Calcium oxalate monohydrate (Whewellite) / CaC2O4·H2O
Mineral (Biogenic)
Quartz Vein in Sedimentary Rock
Silicon Dioxide (SiO2) with host Chert or Limestone
mineral
Limonite Concretion
Limonite (Hydrated iron oxide) FeO(OH)·nH2O
sedimentary
Sandstone (Calcareous/Lithic)
Sedimentary Rock (Clastic Sandstone with Calcium Carbonate cement)
sedimentary
Geode
Crystalline Quartz in Sedimentary Matrix (SiO2)
sedimentary
Banded Agate
Agate (Silicon Dioxide, SiO2)
sedimentary
Moqui Marble
Iron-oxide concretion (typically Goethite or Hematite)
sedimentary
K2 Stone (or K2 Jasper)
Azurite-in-Granite (Potassium Feldspar, Quartz, Plagioclase, Muscovite, and Azurite)
igneous
Zebra Jasper
Tektite variety of Silicon Dioxide (SiO2) with inclusions
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Asphalt (Road Aggregate)
Asphalt concrete / Bituminous mixture
anthropogenic sedimentary (technolith)
Granite
Granite
Igneous
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Banded Agate (Polished Slice)
Chalcedony (SiO2) with Quartz
mineral
Schist
Mica Schist
metamorphic
Chert with Quartz Veining
Microcrystalline silica (SiO2)
sedimentary