Pink amethyst geode
Quartz (SiO₂), with iron-related pink coloration; likely a quartz geode
mineral
Category
Quartz
Browse quartz specimens identified by the Rock Identifier community.
Quartz / Limestone Gravel
SiO2 (Silicon Dioxide) and CaCO3 (Calcium Carbonate)
igneous and sedimentary mixture
Dyed or coated quartz/amethyst specimen (likely)
Quartz, SiO₂; purple portion may be amethyst, iron-bearing quartz
mineral
Weathered quartz-rich metamorphic rock
Likely quartzite or quartz-veined schist; predominantly SiO₂ (quartz) with possible feldspar, mica, and iron-oxide minerals
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Ferric Oxide inclusions
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (likely agate/chert fragment)
Microcrystalline quartz, SiO₂
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pink amethyst or pale pink quartz gemstone
Quartz, SiO₂; pink coloration may result from microscopic inclusions or irradiation-related defects
gemstone
Weathered quartz-rich cobble, possibly milky quartz with iron staining
Quartz (SiO₂), likely with iron-oxide/hydroxide coatings and minor host-rock inclusions
mineral
Pink quartz (likely rose quartz)
Quartz, silicon dioxide (SiO₂), pink variety commonly called rose quartz
mineral
Quartz (Milky Quartz / Quartzite Pebble)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz and Biotite Schist
Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartz-rich rock, possibly milky quartz with iron staining
Predominantly silicon dioxide (SiO₂); exact rock type cannot be determined from the photo
mineral
Tumbled pink quartz, likely rose quartz
Rose quartz; predominantly silicon dioxide (SiO₂), commonly colored by trace iron, titanium, or manganese
mineral
Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within metamorphic/igneous matrix
igneous/metamorphic
Pegmatitic Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Gold-bearing Quartz
Auriferous Quartz (SiO2 with native Au)
mineral
Quartz-rich gneiss
Foliated quartz–feldspar–mica gneiss, possibly migmatitic
metamorphic
Amethyst cluster
Quartz, purple variety — SiO₂, colored mainly by irradiation and iron-related impurities
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Quartz with Mica (Gneissic or Pegmatitic origin)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(F,OH)2)
metamorphic
Quartz geode
Quartz (SiO₂), likely a quartz-lined geode in a carbonate-rich host
mineral
Small iron-stained quartz pebble
Quartz (SiO₂), with yellow-brown iron-oxide staining
mineral
Quartz-veined metamorphic rock
Likely quartz-veined schist or gneiss; exact identification requires closer examination
metamorphic
Cherry Quartz
SiO2 (Silicon Dioxide with iron-rich inclusions/dye)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Rounded quartz-rich pebble, possibly milky quartz or quartzite
Quartz (SiO₂), potentially quartzite if recrystallized rock
mineral