Mica Schist
Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)
metamorphic
Category
Man Made Object (Metalwork)
Browse man made object (metalwork) specimens identified by the Rock Identifier community.
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Coquina
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Coquina / Fossiliferous Limestone
Calcareous bioclastic sedimentary rock (CaCO3)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Gold (Processed)
Gold (Au)
Metal (Elemental Mineral)
Tiger’s-eye
Quartz variety; fibrous pseudomorph of quartz after crocidolite, SiO₂
mineral
Quartz (Yellow/Orange variety)
Silicon Dioxide (SiO2)
mineral
Jasper
Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2 with iron oxide impurities)
sedimentary
White Chalcedony
Silicon Dioxide (SiO2)
mineral
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Agate
Silicon Dioxide (Chalcedony), SiO2
sedimentary
Pink Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Jasper
Silicon Dioxide (Microcrystalline Quartz), SiO2
sedimentary
Sodalite
Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)
mineral
Fossil Coral
Hexagonaria / Rugosa / Scleractinia
fossil
Chalcedony
Silicon Dioxide (SiO2)
mineral
Chrysoprase
Chalcedony (SiO2)
gemstone
Fossilized Coral
Hexagonaria (Rugose coral) / Calcium Carbonate (CaCO3)
fossil
Petrified Wood
Silicified Wood (SiO2)
fossil
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Green Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Petrified Wood
Silicified wood (primarily quartz, SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Banded Calcite (often sold as Onyx or Mexican Onyx)
Calcite (CaCO3)
sedimentary
Amazonite
Microcline Feldspar (KAlSi3O8)
mineral
Green Aventurine
Quartz with fuchsite inclusions (SiO2)
mineral
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (SiO2) with impurities, microcrystalline quartz
sedimentary
Quartz Crystal Cluster with Iron Stain
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon Dioxide (Quartz variety, SiO2)
mineral
Polished Nephrite Jade
Calcium magnesium iron silicate hydroxide - Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Concretion
Septarian Concretion
sedimentary
Turquoise (Dyed Howlite or Magnesite imitation)
Hydrated phosphate of copper and aluminum / CuAl6(PO4)4(OH)8·4H2O
mineral
Banded Calcite / Fluorite (or Onyx/Agate depending on hardness)
CaCO3 or CaF2 (depending on exact ID)
Mineral