Tourmalinated Quartz
Crystalline Silicon Dioxide with Schorl inclusions (SiO2 + NaFe3Al6(BO3)3Si6O18(OH)4)
Category
Browse mineral (specifically a cryptocrystalline variety of quartz) specimens identified by the Rock Identifier community.
Tourmalinated Quartz
Crystalline Silicon Dioxide with Schorl inclusions (SiO2 + NaFe3Al6(BO3)3Si6O18(OH)4)
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Polished orbicular jasper
Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron oxides and green alteration minerals
White Topaz
Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2]
Yellow Agate
Chalcedony (cryptocrystalline Quartz), SiO2
Chert / Flint Nodule
Microcrystalline quartz (SiO2)
Chert (with Iron Staining)
Microcrystalline Quartz (SiO2)
Chert Arrowhead
Chert (Cryptocrystalline variety of Quartz, SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Tumbled carnelian (likely chalcedony)
Carnelian, orange-red cryptocrystalline quartz (SiO₂), a variety of chalcedony
Emerald
Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Jasper Shard / Chert
Silicon dioxide (SiO2)
Tiger's Eye (specifically Blue Tiger's Eye / Falcon's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2)
Jasper
Jasper (a variety of Chalcedony, SiO2)
Chert (Flint)
Chert (Cryptocrystalline Quartz, SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Chert (Flint variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Banded Agate (Onyx Variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
Blue Topaz
Aluminum Silicate Fluoride Hydroxide Al2SiO4(F,OH)2
Chert (and Jasper/Flint variety)
Cryptocrystalline Quartz (SiO2)
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
Chert (specifically Flint or Common Opal variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (specifically Yellow/Brown Chert or Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
Banded Jasper (possibly "Picture Jasper")
Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)
Chert (specifically Flint or Common Opal fragment)
Cryptocrystalline Silica (SiO2)
Chert (Flinty variety)
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chalcedony (Agate/Chert variety)
Silicon Dioxide (SiO2)
Carnelian (Chalcedony variety)
SiO2 (Silicon Dioxide)
Chalcedony
Silicon dioxide (SiO2) - Cryptocrystalline Quartz
Dragon Vein Agate
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Flower Agate (Plume Agate)
Chalcedony (Silicon Dioxide) with Spherulitic Inclusions - SiO2
Polished banded agate, likely moss or dendritic agate
Microcrystalline quartz (chalcedony), SiO₂, with iron/manganese inclusions