Sardonyx Agate Sphere
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
mineral
Category
Mineral (Tectosilicate)
Browse mineral (tectosilicate) specimens identified by the Rock Identifier community.
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Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, FeO(OH)·nH2O)
mineral
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz, SiO2)
sedimentary
Turquoise (set in silver jewelry)
Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)
mineral
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Moonstone
Orthoclase feldspar ((K,Na)AlSi3O8)
mineral
Sandstone (likely Ferruginous)
Sandstone (SiO2 with iron oxides)
sedimentary
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O
mineral
Quartz Geode with Calcite
Silicon Dioxide (SiO2) with Calcium Carbonate (CaCO3)
mineral
Basalt with Mineral Vein (Cobble)
Basalt (with likely Quartz/Calcite vein)
Igneous
Sandstone (Greywacke/Siltstone variant)
Arenite / Wacke (SiO2 with diverse mineral inclusions)
sedimentary
Lapis Lazuli
Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral
Chrysocolla in Cuprite (Sonoran Sunrise)
Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) (Chrysocolla) and Cu2O (Cuprite)
mineral
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)
mineral
Sandstone (Quartzite texture)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Dalmatian Stone
Peralkaline rhyolite
igneous
Lepidolite with Quartz
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Olivine in Basalt matrix
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
igneous
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Jasper
Jasper (Silicate mineral, SiO2)
sedimentary
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
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
Quartzite Pebble
Quartzite (SiO2) with mineral inclusions
metamorphic
Red Jasper
Jasper (Silicate Mineral - SiO2)
sedimentary
Schist
Schist (various mineral compositions)
metamorphic
Sandstone
Sandstone (various mineral compositions)
Sedimentary
Amygdaloidal Basalt
Basalt with secondary mineral infilling
igneous
Quartz with Arsenopyrite
Silicon Dioxide (SiO2) with Iron Arsenic Sulfide (FeAsS)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous