Chalcedony on Matrix
Silicon Dioxide (SiO2)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Chalcedony on Matrix
Silicon Dioxide (SiO2)
Black Veined Jasper (Spiderweb Jasper)
Silicon Dioxide (SiO2)
Red Garnet
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
Red Garnet (Pyrope or Almandine)
Magnesium aluminum silicate (Mg3Al2(SiO4)3) or Iron aluminum silicate (Fe3Al2(SiO4)3)
Agate (Grey Agate Slice)
Microcrystalline Quartz (SiO2)
Jasper
Silicon dioxide (SiO2) with impurities
Chalcedony (Agate / Moss Agate)
Silicon Dioxide (SiO2)
Banded Agate / Lace Agate
Agate (Silica/Quartz) - SiO2
Blue Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)
Amethyst
SiO2 (Silicon Dioxide)
Milky quartz (quartz crystal)
Quartz, silicon dioxide (SiO₂)
Yellow Jasper
Silicon Dioxide (SiO2) with impurities
Red Jasper
Microcrystalline Quartz (SiO2 with Iron Oxide impurities)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Red Jasper
Jasper (Silicon Dioxide, SiO2 with iron oxide impurities)
Jasper
Silicon dioxide (SiO2)
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Carnelian
Carnelian (a variety of Chalcedony, SiO ₂)
Sunstone (variety of Feldspar)
Oligoclase Sunstone, Plagioclase Feldspar (Na,Ca)Al(Si,Al)Si2O8
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Obsidian
Volcanic Glass (SiO2 with impurities)
Quartz (specifically Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Tumbled carnelian
Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)
Jadeite
Jadeite (NaAlSi2O6)
Amethyst Quartz Pendant
Silicon Dioxide (SiO2)
Agate
Silicon dioxide (Chalcedony), SiO2
Petrified Wood
Silicified Wood (primarily SiO2)
Amethyst
SiO2 (Silicon Dioxide) - a variety of Quartz
Carnelian
SiO2 (Silicon Dioxide with Iron Oxide impurities)
Quartz (Milky/Macro-crystalline)
Silicon Dioxide (SiO2)
Chalcedony (Agate/Carnelian)
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2) - Chalcedony variety
Quartz
Silicon Dioxide (SiO2)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Quartz (Iron-stained or Milky)
Silicon Dioxide (SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Mixed Gemstone Beaded Jewelry
Various minerals (e.g., Quartz varieties like Rose Quartz, Amethyst; Peridot; Garnet; etc.)
Tumbled carnelian (red-orange chalcedony)
Carnelian, a cryptocrystalline variety of quartz: SiO₂
Red Jasper
Jasper (variety of Chert) - SiO2
Rose Quartz
SiO2 (Silicon Dioxide)