Quartz on Matrix
Silicon Dioxide (SiO2)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Quartz on Matrix
Silicon Dioxide (SiO2)
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Quartz
Ruby
Corundum (Al2O3)
Jasper
Silicon dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide, SiO2
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Quartz (Smoky or Citrine variety)
Silicon Dioxide (SiO2)
Polished carnelian/chalcedony pebble
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony
Quartz (Smoky/Druzy variety)
Silicon Dioxide (SiO2)
Dyed pink agate slice
Agate (microcrystalline quartz, SiO₂), commonly chalcedony with artificial dye
Chalcedony (specifically Agate or Common Opal variety)
Cryptocrystalline Silica (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Jasper
Silicon dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
Black Onyx
Silicon Dioxide (SiO2) with cryptocrystalline structure
Yellow Chalcedony
Silicon Dioxide (SiO2)
Serpentine (Serpentinite)
Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
Obsidian
Obsidian (Volcanic Glass)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Jade (Nephrite or Jadeite)
Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 (amphibole mineral); Jadeite: NaAlSi2O6 (pyroxene mineral)
Citrine
Silicon dioxide (SiO2)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Jasper
Silicon dioxide (SiO2)
Jasper
Jasper (Silicon Dioxide, SiO2)
Tumbled pink quartz (likely rose quartz)
Quartz, silicon dioxide (SiO₂), pink variety commonly called rose quartz
Rose Quartz
Rose Quartz (SiO2 with traces of Titanium, Manganese, or Iron)
Jasper
Jasper (Silicon Dioxide, SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite or Iron Hydroxide inclusions
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Chert (Jasper variety)
Silicon dioxide (SiO2)
Jasper (Green Jasper / Moss Agate variety)
Silicon Dioxide (SiO2)
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Garnet
Garnet group (X3Y2(SiO4)3)
Banded Calcite (variety Honey Calcite / Chocolate Calcite)
Calcium Carbonate (CaCO3)
Amethyst (Raw Cluster)
Silicon Dioxide with iron impurities (SiO2)
Citrine
Silicon Dioxide (SiO2) with iron impurities
Chert (often called Flint)
Chert (Cryptocrystalline Silica, SiO2)