Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Synthetic Glass (Often Categorized As A Simulated Mineral)
Browse synthetic glass (often categorized as a simulated mineral) specimens identified by the Rock Identifier community.
Citrine Quartz
Crystalline Silicon Dioxide (SiO2) with Ferric Iron impurities
mineral
Milky Quartz (Tumble Fragment)
Silicon Dioxide (SiO2)
mineral
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and mineral inclusions
sedimentary
Rough Garnet (likely Almandine or Pyrope)
Garnet group; Almandine Fe3Al2(SiO4)3 or Pyrope Mg3Al2(SiO4)3
mineral
Rose Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Green Aventurine
Aventurine (Silicon dioxide, SiO₂)
Mineral; variety of Quartz
Quartz (Milky or Pink-tinged)
Silicon Dioxide (SiO2)
mineral
Epidosite
Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})
metamorphic
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Byproduct)
mineraloid
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite (River Stone)
Quartzite
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)
Quartz (SiO₂)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (mica)
Mineral (variety of Quartz)
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
mineral
Chert (Black Chert/Flint)
Chert (Silicon Dioxide, SiO2)
sedimentary
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Agate
Agate (Cryptocrystalline Variety of Quartz, SiO2)
Mineral
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite inclusions
igneous
Quartzite (River Pebble)
Metamorphosed sandstone (SiO2)
metamorphic
Ferruginous Quartz
Iron-stained Quartz (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2) with iron oxide and clay inclusions
sedimentary
Banded Sandstone (Differential Weathering)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Rose Quartz
Crystalline Silicon Dioxide with trace Titanium, Iron, or Manganese (SiO2)
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
Chert (Brecciated or Veined)
Silicon Dioxide (SiO2)
sedimentary
Chert / Flint
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
sedimentary
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Beryl (Emerald or Aquamarine in Matrix)
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Carnelian (Chalcedony variety)
SiO2 (Silicon Dioxide)
Mineral
Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Rose Quartz
Silicon Dioxide with trace inclusions of dumortierite or titanium (SiO2)
mineral
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 with iron oxide inclusions)
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary