Quartz

Iron-stained quartz (likely quartz-rich vein rock)

Quartz, SiO₂, with iron-oxide/hydroxide staining (limonite/goethite)

Quartz-bearing rock or quartz-rich mineral specimen

Quartz, silicon dioxide (SiO₂); exact host rock is uncertain from the image

Quartz-rich geode or mineralized cavity in host rock

Likely a quartz-bearing geode; the pale crystals may be quartz (SiO₂), but the photo is not detailed enough for a firm identification.

Quartz vein in host rock (possibly milky quartz with iron-stained material)

Quartz, SiO₂, with an unidentified host rock and possible iron-oxide staining

Milky Quartz with Chlorite/Mica inclusions

Silicon Dioxide (SiO2) with inclusions

Rose quartz

Quartz (silicon dioxide, SiO₂), pink massive variety

Rose quartz

Quartz, silicon dioxide (SiO₂), pink variety

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2) with Hematite/Limonite

Clear Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz with Matrix

Silicon Dioxide (SiO2)

Rainbow aura quartz cluster

Quartz, silicon dioxide (SiO₂), artificially coated with a thin metallic film

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Strawberry Quartz (or Hematoid Quartz)

Silicon Dioxide (SiO2) with inclusions of Hematite or Goethite

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Milky Quartz with Hematite inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Rose Quartz

Silicon Dioxide (SiO2)

Clear quartz crystal beads

Quartz (silicon dioxide, SiO₂)

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Tumbled pink quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), likely rose quartz

Weathered quartz-rich rock, possibly quartzite or quartz vein material

Quartz-dominant aggregate; chiefly SiO₂, with likely iron-oxide staining and minor feldspar or mica

Tumbled quartz-rich pebble, possibly quartzite

Quartzite (mostly SiO₂); alternatively quartz-rich sandstone

Small quartz fragment, possibly milky quartz

Quartz (SiO₂)

Quartz-veined Basalt or Limestone Pebble

Quartz vein in host rock (Silicate mineral in carbonate or volcanic matrix)

Pyrite on Quartz (Fool's Gold in Quartz)

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Included Quartz (Garden Quartz / Lodolite)

Quartz (SiO2) with various mineral inclusions

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Quartz crystal fragment in weathered host rock

Quartz (SiO₂), possibly in a feldspathic or iron-stained matrix

Tumbled orange-brown quartz pebble

Likely iron-stained quartz or chalcedony (SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Rounded quartz-rich pebble, likely quartzite or quartz sandstone

Quartzite (mostly SiO₂), possibly ferruginous quartz sandstone

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (mostly SiO2)