Milky Quartz (Beach Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Mineral (Tectosilicate)
Browse mineral (tectosilicate) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite (Pink/Red Orthoclase variety)
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
igneous
Greenschist
Greenschist (chlorite-epidote schist)
metamorphic
Ruby in Zoisite
Anyolite (Ruby in Zoisite)
metamorphic
Larimar
Pectolite (Blue variety), NaCa2Si3O10(OH)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Moonstone
Orthoclase (KAlSi3O8), specifically the variety showing adularescence
mineral
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Moonstone
Adularia / Orthoclase (KAlSi3O8)
mineral
Aquamarine (Rough)
Beryl (Be3Al2Si6O18)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Fuchsite with Ruby
Cr-rich Muscovite with Corundum (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Alexandrite in Matrix
Chrysoberyl (BeAl2O4 with Chromium)
mineral
Amethyst
Silicon dioxide with iron impurities (SiO2:Fe3+)
mineral
Red Jasper
Silicon Dioxide with Iron inclusions (SiO2 + Fe2O3)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz Geode (partially formed)
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))
metamorphic
Lapis Lazuli
Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite
metamorphic
Black Opal
Hydrated Silica (SiO2·nH2O)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Drill Core Sample
Cylindrical Rock Core (Specific mineralogy varies by extraction site)
Metamorphic (Likely Gneiss or Schist based on texture)
Arsenopyrite in Quartz/Host Rock
Arsenopyrite (FeAsS)
mineral
Emerald In Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
mineral
Opal
Hydrated Silica (SiO2·nH2O)
mineral
Argetine Blue Agate (Chalcendony variant)
Silicon Dioxide (SiO₂)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Amazonite
Microline Feldspar (KAlSi3O8)
mineral
Quartz (specifically Milky/Gray Quartz vein)
Silicon Dioxide (SiO2)
mineral
Jasper with Agate Inclusions
Jasper (Silicon Dioxide, SiO2) with Chalcedony/Agate
sedimentary
Gold-bearing Quartz
Lode Gold in Silicon Dioxide (SiO2)
mineral
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Hawk's Eye (Blue Tiger's Eye)
Quartz (fibrous crocidolite variety)
Mineral
Pyrite in Matrix (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Native Copper within Host Rock
Native Copper (Cu)
Mineral
Amethyst
Silicon Dioxide (SiO2) with traces of Iron (Fe3+)
mineral
Raw Emerald in Schist Matrix
Beryl (Be3Al2Si6O18) in Mica Schist
Mineral in Metamorphic Rock
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral