Chert (Limestone-based)
Silicon dioxide (SiO2)
Category
Browse man made glass specimens identified by the Rock Identifier community.
Chert (Limestone-based)
Silicon dioxide (SiO2)
Black Freshwater Pearls
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Basalt with Garnet inclusions
Basalt containing Nesosilicate (Garnet Group, likely Almandine Fe3Al2Si3O12)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Amber
Succinite (specifically Baltic Amber) - Formula: C10H16O (approximate)
Pallasite Meteorite
Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)
Quartzite (River Stone)
Quartzite (SiO2)
Green Fluorite
Calcium Fluoride (CaF2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
Fluorite (Rainbow/Purple Fluorite)
Calcium Fluoride (CaF2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Red Moss Agate (Jasper)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Petrified Wood
Silicified Wood (SiO2)
Quartzite
Quartzite (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Olivine-bearing Basalt / Scoria
Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)
Basalt with Peridotite (Olivine) Xenolith
Olivine-rich Peridotite (Dunite) xenolith in Vesicular Basalt; chemical formula (Mg,Fe)2SiO4
Pink Quartz / Rose Quartz
Silicon Dioxide (SiO2)
Quartz (Milky Quartz Pebbles)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3 / inclusion in SiO2)
Sandstone (with cross-bedding)
Arenite (composed primarily of Quartz: SiO2)
Milk Quartz (White Quartz)
Silicon Dioxide (SiO2)
Chert / Flint (with quartz or calcite inclusion)
Silicon dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Milky Quartz with Epidote or Chlorite inclusions
Silicon Dioxide (SiO2) with inclusions of Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
Jasper (Iron Oxide Rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite/Goethite) inclusions
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Red Jasper (Chert)
Silicon Dioxide (SiO2)
Milk Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
Chert (specifically Gray Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Quartzite River Pebbles
Quartzite (primarily SiO2)