Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Amethyst (likely tumbled or cut)
Quartz, SiO₂; purple color typically from iron-related defects and natural irradiation
Chrysoprase
Silicon dioxide with nickel impurities (SiO2 + Ni)
Rough smoky quartz crystal
Quartz (SiO₂), smoky variety
Carnelian (Orange Agate)
Carnelian (variety of Chalcedony, SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
African Turquoise
Jasper (Silica mineral, quartz variety)
Sunstone
Oligoclase (Plagioclase Feldspar) / (Ca,Na)(Al,Si)4O8
Quartz fragment
Quartz (silicon dioxide, SiO₂)
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Hawk's Eye (Blue Tiger's Eye)
Quartz (fibrous crocidolite variety)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Pink-red faceted gemstone ring (likely garnet)
Possibly pyrope–almandine garnet, (Mg,Fe)₃Al₂(SiO₄)₃; identification from the image is uncertain
Chalcedony
Silicon Dioxide (SiO2)
Likely garnet (rough, iron-rich variety)
Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; image alone cannot confirm identification
Polished multicolored jasper cabochon (likely brecciated or picture jasper)
Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides and other inclusions
Quartz-rich pegmatite fragment
Granitic pegmatite, chiefly quartz (SiO₂) with feldspar and mica
Tumbled amethyst
Amethyst, purple variety of quartz (SiO₂)
Amethyst chip or tumbled fragment
Quartz, SiO₂; purple coloration from trace iron and irradiation
Chiastolite
Andalusite (Al2SiO5) with carbonaceous inclusions
Yellow Quartz
Silicon Dioxide (SiO2)
Likely rough smoky quartz
Quartz, SiO₂ (smoky variety)
Amethyst
Amethyst (variety of Quartz, SiO2)
Amazonite
Microcline (K(AlSi3O8))
Pyrite
Iron Disulfide (FeS2)
Quartz
Silicon Dioxide (SiO2)
Chert / Jasper
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Citrine
Silicon dioxide (Quartz variety), SiO2
Polished brecciated jasper
Jasper, microcrystalline quartz (SiO₂), with iron-oxide inclusions
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)