Quartz (Milky/Gray variety)
Silicon Dioxide (SiO2)
Category
Browse mineral (specifically a cryptocrystalline variety of quartz) specimens identified by the Rock Identifier community.
Quartz (Milky/Gray variety)
Silicon Dioxide (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
Quartz
Silicon Dioxide (SiO2)
Sandstone (specifically an Iron-Concretion)
Arenite with Iron Oxide (Limonite/Goethite) cementation
Chert (Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions of hornblende or chlorite
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Quartz (specifically Milky Quartz or Quartzite)
Silicon Dioxide (SiO2)
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Chert
Microcrystalline quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Flint / Chert
Microcrystalline Quartz (SiO2)
Chert (Flint variety)
Microcrystalline Quartz (SiO2)
Tumbled pink chalcedony (likely pink agate/jasper)
Microcrystalline quartz, SiO₂, with iron-oxide coloring
Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)
Jasper, microcrystalline quartz (SiO₂)
White Quartz Egg
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Red Jasper with Quartz Veining
Jasper (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chert (with Quartz veins)
Chert (Microcrystalline Silicon Dioxide, SiO2)
Quartz (Smoky/Brown variety)
Silicon dioxide (SiO2)
Chert (Jasper/Flint variety)
Silicon dioxide (SiO2) - Microcrystalline Quartz
Bull Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
Milky Quartz
Quartz (Silica - SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chert (Common Opal/Agate variety)
Microcrystalline Quartz (SiO2)
Chert (Common Opal/Chalcedony variety)
Microcrystalline Quartz (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz (Tumbled)
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Chert (Flint nodule)
Silicon dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)