Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral, variety of chalcedony (microcrystalline quartz) specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Chert (Yellow/Tan variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Quartz / Quartzite
Silicon Dioxide (SiO2)
Milky Quartz (Crystal Cluster)
Silicon Dioxide (SiO2) - Quartz Variety
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Chert (Common Chert)
Cryptocrystalline Quartz (SiO2)
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
Petrified Wood
Silicified Wood (SiO2)
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode form
Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)
Mixed Silicates and Oxides (predominantly SiO2 group minerals)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Milky Quartz with inclusions
Quartz (Silicon Dioxide, SiO2)
Banded Agate (specifically Lake Superior Agate type)
Silicon Dioxide (SiO2) - Microcrystalline Chalcedony
Dendritic Agate (Tree Agate)
Chalcedony (Silicon Dioxide, SiO2) with Manganese or Iron Oxide inclusions
Mixed Quartz and Jasper Pebbles
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Rose Quartz
Quartz (SiO₂), variety Rose Quartz
Rose Quartz
Quartz (SiO₂), specifically a variety of Quartz
Petrified Wood
Silicified Wood (primarily SiO2)
Chert (specifically River Stone / Jasper variety)
Microcrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chert
Chert (Microcrystalline Quartz, SiO2)
Quartzite
Quartzite (SiO2)
Petrified Wood (Agatized/Silicified Wood)
Silicified Wood (SiO2)
Strawberry Quartz
Silicon Dioxide (SiO2) with Hematite/Goethite inclusions
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon dioxide (SiO2)
Jasper (likely a variety of Brecciated Jasper or a patterned variety)
Silicon dioxide (SiO2)
Petrified Dinosaur Bone (Gembone)
Agatized Dinosaur Bone
Dendritic Opal (Common Opal)
Amorphous Hydrated Silica (SiO2·nH2O) with Manganese or Iron Oxide inclusions
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Red Jasper
Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)
Chert (specifically Blue Chert/Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Mn/Fe/Chlorite)
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Iron-stained Quartz
Silicon Dioxide with Hematite/Limonite impurities (SiO2 + Fe2O3)