Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)
mineral
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Fossilized Shell Fragment
Bivalvia or Gastropoda (Class) fragment
fossil
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Shark Tooth Fossil
Otodus obliquus (or similar prehistoric lamniform shark tooth)
fossil
Shark Tooth Fossil
Chondrichthyes fossil
fossil
Snowflake Obsidian (Polished Cabochon)
Obsidian with Spherulitic Cristobalite (SiO2)
igneous
Tumbled Stone
Silicon dioxide / Various silicates
mineral
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Red Sandstone (Iron-rich)
Ferruginous Sandstone (SiO2 with Iron Oxides)
sedimentary
Purple Turquoise (Composite Mojave Turquoise)
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate composite)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Fossil Shark Tooth
Chondrichthyes tooth fossil
fossil
Ferruginous Sandstone
Sandstone (arenite) with Limonite/Goethite cement
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Hematite
Hematite (Fe2O3)
mineral
Blue Apatite
Fluorapatite / Apatite Group (Ca5(PO4)3(F,Cl,OH))
mineral
Black Tourmaline
Schorl (Sodium iron aluminum boron silicate hydroxide)
mineral
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Pearl
Calcium carbonate (CaCO3) in the form of Aragonite or Calcite
mineral
Carnelian Agate / Iron-Stained Quartz
SiO2
Mineral
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
mineral
Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode (with Calcite influence)
Silicon Dioxide (SiO2) with possible Calcium Carbonate (CaCO3)
mineral
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Jasper-Agate Breccia
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
sedimentary
Polished Quartz Sphere
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheets with Quartz)
metamorphic
Quartz Crystal Matrix
Silicon Dioxide (SiO2)
mineral
Shark Tooth Fossil
Selachii fossil
fossil
Fossil Shell (Bivalve)
Phylum Mollusca, Class Bivalvia
fossil
Fossil Seashell
Invertebrate fossil (Bivalvia)
fossil
Mystic Topaz (Treated Quartz or Topaz)
Silicate Mineral (SiO2 or Al2SiO4(F,OH)2) with Titanium coating
gemstone
Leopard Skin Jasper
Silicon Dioxide (SiO2) with iron and manganese inclusions
sedimentary