Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Category
Browse organic (if resin) or synthetic (if glass); simulating sedimentary or metamorphic (for natural stones) specimens identified by the Rock Identifier community.
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Yellow Quartz (Citrinated Quartz)
Silicon Dioxide (SiO2)
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Strawberry Quartz (Hematoid Quartz)
Silicon Dioxide with Hematite/Goethite inclusions (SiO2 + Fe2O3)
Hag Stone (Holed Quartzite Pebble)
Quartzite (SiO2 based) with natural vug or erosion hole
Orange Calcite
Calcium Carbonate (CaCO3)
Blue Sapphire
Corundum (Al2O3)
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Quartzite Pebble
Quartzite (primarily SiO2)
Citrine or Yellow Quartz
Silicon Dioxide (SiO2) with iron impurities
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Blue Quartz (Dumortierite Quartz / Celestite)
Silicon Dioxide (SiO2) with inclusions
Black Agate
Chalcedony (SiO2)
Blue Agate (Dyed or Treated Chalcedony)
Silicon Dioxide (SiO2), microcrystalline quartz variety
Quartzite Pebble
Metamorphic Quartz-rich Rock
Amber
Succinite
Quartz (Pebble)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Amber
Succinite (Carbon-based organic compound; approximate formula C10H16O)
Mixed River Pebbles
Clastic Sedimentary Alluvial Deposit / Polymictic Conglomerate Clasts
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
Smoky Quartz (Polished)
Silicon Dioxide (SiO2)
Quartz pebble
Silicon dioxide (SiO2)
Shungite
Non-crystalline carbon (allotrope of carbon)
Milky Quartz with Chlorite/Epidote
Silicon Dioxide (SiO2) with phyllosilicate or sorosilicate inclusions
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Chert with Quartz Veins
Microcrystalline silica (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Citrine
Silicon dioxide (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Ruby (Corundum)
Aluminum oxide (Al2O3) with Chromium traces
Smoky Quartz
Silicon Dioxide (SiO2)
Blue Goldstone
Aventurine Glass (SiO2 with Co and metallic inclusions)
Quartz Pebble
Silicon Dioxide (SiO2)
Asphalt (Bituminous Concrete)
Bituminous mix / Anthropogenic conglomerate
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Banded Gneiss River Pebble
Gneiss
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Dyed Quartzite (Pink/Magenta)
Silicon Dioxide (SiO2) - Artificially Colored Quartzite