Garnet
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Geode (unopened)
Quartz-filled Geode (SiO2)
sedimentary
Bivalve Fossil in Sedimentary Matrix
Fossiliferous Mudstone (Class: Bivalvia)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Petrified Wood (Silicified Wood)
Silicified fossil wood (SiO2)
metamorphic
Marble
Metamorphosed Limestone (CaCO3)
metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or limonite inclusions
sedimentary
Ironstone Concretion (Moqui Marble)
Hematite/Goethite Concretion (Fe2O3 / FeO(OH))
sedimentary
Conglomerate
Conglomerative Rudite (SiO2/CaCO3 matrix)
sedimentary
Diorite Gneiss
Foliated Diorite Gneiss
metamorphic
Rose Quartz
Silicon dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Ironstone Concretion / Limonite Node
Goethite and Limonite (FeO(OH) nH2O)
sedimentary
Sandstone
Arenite
sedimentary
Hematite with Magnetite
Iron Oxide (Fe2O3)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
Sedimentary
Malachite
Malachite, Cu2(CO3)(OH)2
Mineral
Mosasaur Tooth Fossil
Mosasaurid vertebrate fossil (Hydroxyapatite)
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with dendritic inclusions
mineral
Petrified Wood
Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2
sedimentary
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite - Lithium-rich Mica)
mineral
Pink Quartz (Inclusion-filled)
Silicon Dioxide (SiO2)
mineral
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Chalcedony or Quartz, SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Ironstone Concretion (Limonite/Goethite)
Ferruginous concretion (Fe2O3·nH2O)
sedimentary
Rose Quartz
Silicon dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Mineral
Blue Quartzite
Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Greyscale Moonstone / Silver Sheen Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Quartz (Milky/Gray variety)
Silicon Dioxide (SiO2)
mineral
Green Quartz (including Prase or Aventurine variants)
Silicon Dioxide (SiO2) with inclusions (likely Actinolite or Chlorite)
mineral
Quartz (Milky or Rough Quartz)
Silicon Dioxide (SiO2)
mineral