Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral (man made glass) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Obsidian
Volcanic Glass (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Chert (Flint)
Chert (Cryptocrystalline Silicon Dioxide, SiO2)
Pyrite
Iron Sulfide (FeS2)
Quartz
Silicon Dioxide (SiO2)
Quartz geode
Microcrystalline quartz and drusy quartz (SiO₂), commonly lining a chalcedony-rich cavity
Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)
Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))
Quartz Sandstone
Quartz Arenite
Quartz
Silicon Dioxide (SiO2)
Rose Quartz
SiO2 (Silicon Dioxide)
Quartz (Clear Quartz / Rock Crystal)
Silicon Dioxide (SiO2)
Sandstone (Quartzite Pebble)
Arenite / Metamorphosed Sandstone (SiO2)
Quartz-rich metamorphic rock, likely milky quartz or quartzite
Quartz (SiO₂); possibly quartzite composed predominantly of recrystallized quartz
Sandstone
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
Smoky quartz
Quartz, silicon dioxide (SiO₂), brown to gray variety
Weathered quartz-rich pebble (tentative)
Likely quartz/chalcedony, SiO₂, possibly iron-stained
Quartz (Tumbled)
Silicon Dioxide (SiO2)
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
Yellow Fluorite
Calcium fluoride (CaF2)
Quartz Pebble
Silicon Dioxide (SiO2)
Obsidian
Obsidian (Volcanic Glass, SiO2)
Tumbled milky quartz (likely quartz pebble)
Quartz, silicon dioxide (SiO₂)
Moldavite
Moldavite (Siliceous vitreous substance)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz with Mafic Inclusions
Silicon Dioxide (SiO2) with host igneous matrix
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Orthoclase (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
Black Obsidian
Obsidian (Volcanic Glass, SiO2+)
Quartz
Silicon Dioxide (SiO2)
Polished ocean jasper / orbicular jasper
Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other mineral inclusions
Fulgurite
Lechatelierite (Silica glass tubes)
Tektite (Indochinite)
Tektite (Natural silica glass)
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
Sandstone
Arenite (Siliclastic sedimentary rock)