Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Zebra Jasper
Silicon Dioxide (SiO2) with impurities; typically a form of Chalcedony/Microcrystalline Quartz
Obsidian
Volcanic Glass (70-75% SiO2 with MgO and Fe3O4)
Vesicular Basalt (River Pebble)
Vesicular Basalt
Sunstone
Oligoclase (Plagioclase Feldspar) with inclusions - (Ca, Na)((Al, Si)4O8)
Turquoise (set in silver jewelry)
Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)
Amber
Succinite (C10H16O)
Turquoise
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
River Jasper (Chert/Chalcedony mix)
Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions
Chert (Nodule)
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Hematite
Iron(III) oxide (Fe2O3)
Citrine (Heat-treated Amethyst)
Silicon Dioxide (SiO2) with iron impurities
Quartz (Clear/White)
Silicon Dioxide (SiO2)
Citrine
Silicon dioxide (SiO2)
Peridot
Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Quartz Geode (Cracked)
Silicon Dioxide (SiO2)
Black Obsidian
Volcanic Glass (SiO2 + impurities like Fe3O4)
Diamond (or Diamond Simulant)
Carbon (C)
Sandstone
Arenite (SiO2 based)
Chert (often called Flint)
Chert (Microcrystalline Quartz, SiO2)
Obsidian
Obsidian (principally SiO2)
Fluorite
Fluorite (Calcium Fluoride, CaF2)
Muscovite Mica
Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2
Blue Moss Agate / Blue Chalcedony
Silicon Dioxide (SiO2)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Sodalite
Sodalite (Sodium Aluminum Silicate Chloride), Na8(Al6Si6O24)Cl2
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Raw Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
Leopard Skin Jasper
Silicon Dioxide (SiO2) with various inclusions
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Ocean Jasper
Orbicular Jasper (varietal of SiO2 with impurities)
Jasper Conglomerate
Jasper Conglomerate (SiO2 matrix with varying mineral inclusions)
Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)