Quartz pebble with iron staining
SiO2
mineral
Category
Mineral With Metamorphic Or Sedimentary Host
Browse mineral with metamorphic or sedimentary host specimens identified by the Rock Identifier community.
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Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Mica (Biotite or Phlogopite variety)
Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)
mineral
Orange calcite
Calcite, CaCO₃
mineral
Chalcedony / Quartz Nodule (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Schist / Gneiss
Silicon Dioxide (SiO2) in Metamorphic Matrix
igneous
Sandstone with Desert Varnish
Arenite (SiO2 predominantly) with Ferromanganese coating
sedimentary
Red garnet (possible almandine or pyrope), cut/polished
Garnet-group silicate; likely almandine, Fe₃Al₂(SiO₄)₃, or pyrope, Mg₃Al₂(SiO₄)₃
gemstone
Beach Pebble (Quartz / Quartzite)
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Biotite on Quartz Matrix
Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)
mineral
Biotite in Host Matrix
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Milky Quartz with Garnet/Hematite and Basalt
Silicon Dioxide (SiO2) with Almandine (Fe3Al2Si3O12) and Basalt
mineral
Chalcopyrite in Quartz (Gold Ore Matrix)
CuFeS2 (Chalcopyrite) with SiO2 (Quartz)
mineral
Polished yellow chalcedony (likely lemon agate or yellow jasper)
Microcrystalline quartz, SiO₂
mineral
Quartz (Druzy) on Matrix
Silicon Dioxide (SiO2)
mineral
Tumbled green aventurine (probable), with blue-gray tumbled stones
Aventurine quartz, SiO₂ with fuchsite or other mica inclusions; blue stones may be sodalite or dyed quartz
mineral
Pyrite-bearing metamorphic rock (likely greenschist or phyllite)
Quartz–chlorite–mica schist/phyllite with disseminated pyrite (FeS₂)
metamorphic
Quartz vein in metamorphic rock
Crystalline Silicon Dioxide (SiO2) in Host Rock
metamorphic
Gold-bearing Quartz
Lode Gold in Silicon Dioxide (SiO2)
mineral
Faceted Gemstones (Mixed)
Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)
gemstone
Rough Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
mineral
Quartz Geode
Silicon Dioxide (SiO2) in a sedimentary host
sedimentary
Turquoise (set in silver jewelry)
Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18 with Chromium/Vanadium traces)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2) Pebble
sedimentary
Shungite (or Black Onyx / Obsidian)
Amorphous Carbon (Shungite) / SiO2 (Onyx/Obsidian)
mineral
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
metamorphic
Pyrite with Vesicular Matrix
Iron Disulfide (FeS2)
mineral
Quartz-veined dark metamorphic rock
Likely quartz-mica schist or foliated basalt with a quartz vein
metamorphic
Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Milky quartz with dark host-rock inclusions
Quartz (SiO₂), likely in a granitic or metamorphic matrix
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
sedimentary
Likely garnet-bearing rock fragment
Garnet-bearing schist or gneiss; garnet is commonly almandine, Fe₃Al₂(SiO₄)₃
metamorphic
Likely calcite and quartz-rich specimens
Calcite (CaCO₃), possibly with quartz (SiO₂) or feldspar
mineral
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) with Quartz crystals
sedimentary
Fairburn Agate
Cryptocrystalline Quartz (SiO2) with trace Iron Oxides
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral