Metamorphic, Likely Sedimentary With Quartz Veins

Mixed mineral and rock collection

Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones

Polished green aventurine

Quartzite or quartz-rich rock containing fuchsite mica; mainly SiO₂

Milky quartz with dark host-rock inclusions

Quartz (SiO₂), likely in a granitic or metamorphic matrix

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Quartz (likely a form of massive or vein quartz)

Quartz (SiO₂)

Quartzite with inclusions or a banded chert

Quartzite or Chert

Quartz Pebble (Tumbled / Beach Pebble)

Silicon Dioxide (SiO2)

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if the grainy texture is rock-wide

White quartz-rich pebble

Quartz (SiO₂), possibly milky quartz or quartzite

Pink-and-green quartz-rich rock, likely rose quartz with epidote/serpentine

Quartz (SiO₂), variably colored by iron, with possible epidote, chlorite, or serpentine inclusions

Iron-stained quartz-rich rock, likely quartzite or silicified breccia

Quartz (SiO₂), possibly quartzite with limonite/goethite iron oxides

Iron-stained quartz-rich rock (likely quartzite or quartz vein material)

Quartz (SiO₂), commonly with limonite/goethite iron oxides; possible quartzite matrix

Quartz (Milky/Cloudy Variety)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz-veined weathered host rock

Quartz (SiO₂) in a likely altered limestone or metamorphic carbonate host

Quartz (specifically Milky/White Quartz)

Silicon Dioxide (SiO2)

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz (Milky/Smoky variety on matrix)

Silicon Dioxide (SiO2)

Quartz Vein in Matrix / Quartzite

Silicon Dioxide (SiO2) with host rock

White quartz-rich pebble

Likely quartzite or milky-quartz pebble (SiO₂)

Milky Quartz (Common Quartz)

Quartz (Silicon Dioxide, SiO2)

Clear Quartz

Silicon dioxide (SiO2)

Quartzite Cobble with Quartz Vein

Metamorphic Quartzite (SiO2)

Tumbled jasper pebble

Silica-rich microcrystalline quartz/chalcedony, commonly brecciated or iron-stained jasper (SiO₂)

Iron-stained quartz-rich rock, possibly quartzite or hydrothermal quartz

Quartz (SiO₂), likely with iron oxides; exact host rock uncertain from the photograph

White Quartz Pebble

Silicon Dioxide (SiO2)

Pyrite in Matrix (likely Quartz or Coal)

Iron Sulfide (FeS2)

Milky quartz (massive quartz)

Quartz, silicon dioxide (SiO₂)

Milky quartz (rough quartz specimen)

Quartz, silicon dioxide (SiO₂)

Quartz, Sandstone, and Siltstone specimens

Silicon Dioxide (SiO2) and Clastic Sedimentary Rocks

Banded Gneiss (with Quartz Vein)

Gneiss (SiO2 and varied Silicates)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Vein in Host Rock

Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)

Likely weathered quartz or quartz-rich pebble

Quartz, silicon dioxide (SiO₂)

Quartz-rich breccia or vein quartz fragment

Quartz (SiO₂), likely with iron-oxide staining and attached host rock

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Milky quartz

Quartz (SiO₂), commonly massive or vein quartz

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Chert (with Epidote/Quartz veining)

Cryptocrystalline silica (SiO2) with Epidote/Quartz inclusions

White quartz in dark matrix (likely quartz-bearing breccia or polished composite specimen)

Quartz, SiO₂, in an unidentified dark silicate matrix

Rounded quartz-rich pebble

Likely microcrystalline quartz (SiO₂), possibly milky quartz or a pale quartzite fragment