Chalcedony (Quartz Pebbles)
Silicon Dioxide (SiO2)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Chalcedony (Quartz Pebbles)
Silicon Dioxide (SiO2)
Tumbled carnelian
Carnelian, an orange variety of chalcedony (microcrystalline quartz, SiO₂)
Red jasper (likely) bead bracelet
Jasper, an opaque variety of microcrystalline quartz; SiO₂
Carnelian cabochon earrings
Carnelian, a translucent orange variety of chalcedony (microcrystalline SiO₂)
Quartz cabochon turtle pendant
Quartz (SiO₂), likely a translucent variety with natural inclusions
Quartz
Silicon Dioxide (SiO2)
Pink feldspar-bearing pegmatite
Orthoclase–microcline feldspar, chiefly KAlSi₃O₈, in a granitic pegmatite matrix
Pegmatitic granite (likely feldspar–quartz–mica rock)
Granitic pegmatite; chiefly K-feldspar and quartz, with mica and iron-oxide staining
Orthoclase Feldspar
KAlSi3O8 (Potassium aluminum silicate)
Milky Quartz
Silicon Dioxide (SiO2)
Amazonite
Microcline (KAlSi3O8)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Polished jasper (likely brecciated or scenic jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Jasper
SiO2 (Silicon Dioxide)
Amethyst
Silicon Dioxide (Quartz variety), SiO2
Amethyst
Silicon Dioxide (Quartz variety), SiO2
Amethyst
Silicon Dioxide (SiO2), Quartz variety
Amazonite
Microcline (variety of Feldspar), K(AlSi3O8)
Tumbled brown jasper (likely common jasper or chert)
Microcrystalline quartz, SiO₂, chiefly chalcedony/quartz with iron-oxide impurities
Agate (or Chalcedony)
Silicon Dioxide (SiO2)
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Amethyst
Quartz, silicon dioxide (SiO₂), colored purple by trace iron and irradiation
Agate
SiO2
Blue Sapphire
Corundum (Al2O3)
Tumbled amethyst
Amethyst, purple variety of quartz (SiO₂)
Red jasper (likely tumbled)
Microcrystalline quartz, chiefly SiO₂, colored red by iron oxides
White Quartz
Quartz (Silicon Dioxide, SiO2)
Sunstone (Feldspar)
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Quartz
Silicon Dioxide (SiO2)
Pegmatite
Igneous Pegmatite
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)