Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Mineral (Specifically A Gemstone Variety)
Browse mineral (specifically a gemstone variety) specimens identified by the Rock Identifier community.
Greenstone (Greenschist facies)
Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)
metamorphic
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Banded Agate (Gray Agate)
Silicon Dioxide (SiO2) - Chalcedony
mineral
Black Sapphire
Corundum (Al2O3)
mineral
Sandstone (Ferruginous)
Clastic Sedimentary Rock (Litharenite)
sedimentary
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Pearl (as a biogenic mineral/gemstone)
Calcium Carbonate (mostly Aragonite), CaCO3
mineral
Amber
Succinite (C10H16O)
mineral
Blue Quartzite (Dyed)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Moonstone
Orthoclase feldspar ((K,Na)AlSi3O8)
mineral
Agate
Silicon Dioxide (SiO2)
mineral
Fuchsite on Quartz
Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities
metamorphic
Chert (includes Flint & Jasper)
Chert (Siliceous sedimentary rock, chemical formula SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
mineral
Dragon Vein Agate
Chalcedony (cryptocrystalline silica, SiO2) variety Agate
mineral
Chert (Cherty Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8) with inclusions
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Moonstone
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) - variety Jasper
sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Emerald in Host Rock
Beryl (Be3Al2Si6O18) containing Chromium and/or Vanadium
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Labradorite (Larvikite variety)
Plagioclase Feldspar (Na,Ca)(Si,Al)4O8
igneous
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)
mineral
Pearl
Calcium carbonate (CaCO3) as Aragonite or Calcite
mineral
Amazonite
K(AlSi3O8), Microcline (potassium feldspar)
mineral
Lapis Lazuli
Lapis lazuli (a rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Amethyst (Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Water-Worn Cobble)
Silicon Dioxide (SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Milk Quartz (Tumbled Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral