Metamorphic, Likely Sedimentary With Quartz Veins

Likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly quartz-rich rock or calcite

Quartz-rich rock, likely milky quartz

Quartz (SiO₂), possibly a massive quartz aggregate

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Quartz (Smoky/Milky)

Silicon Dioxide (SiO2)

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂), with limonite/goethite staining

Weathered quartz-rich pebble

Milky quartz, chiefly silicon dioxide (SiO₂), possibly with iron-oxide staining and minor feldspar

Natural quartz crystal cluster / massive quartz

Quartz (silicon dioxide, SiO₂)

Mixed rock and mineral collection

Multiple specimens; visible pieces may include quartz, calcite, agate/chalcedony, jasper, and dyed or coated materials

Quartz-rich breccia or vein quartz fragment

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

Quartz Pebble (with Iron Inclusions)

Silicon Dioxide (SiO2)

Weathered quartz-rich pebble

Quartz (SiO₂), possibly quartzite or quartz-bearing vein rock

Weathered quartz-rich rock, possibly quartzite or silicified breccia

Quartzite (predominantly SiO₂); exact identification requires a fresh surface and tests

Quartz-rich iron-stained rock, likely quartzite or quartz vein material

Quartz (SiO₂), with iron oxides/hydroxides such as hematite and goethite

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

Weathered quartz-rich rock, possibly quartzite

Quartzite (tentative identification; exact rock type cannot be confirmed from the image)

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz-rich vein rock (milky quartz with dark host-rock inclusions)

Predominantly quartz (SiO₂), with unidentified dark silicate/mineral inclusions; exact rock type cannot be confirmed visually

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Quartz (Pale Rose or Milky Variety)

Silicon Dioxide (SiO2)

Rounded quartz-rich pebble

Likely milky quartz or quartzite (SiO₂)

Quartz-rich rock fragment, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly an iron-stained quartz vein fragment

Greenish quartz-bearing rock, possibly serpentine or aventurine

Tentatively quartz (SiO₂) with green inclusions; exact identification requires testing

Iron-stained quartz or quartz-rich rock

Quartz (SiO₂), possibly limonite/goethite-stained quartzite or breccia

Likely quartz-bearing rock (possibly milky quartz or quartzite)

Quartz, silicon dioxide (SiO₂); exact identification is limited by the small photograph

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂), commonly with hematite/goethite inclusions

Quartz (likely Yellow/Orange variety, possibly Citrine or Chalcedony with iron staining)

Quartz (SiO₂)

Weathered quartz-rich rock, possibly iron-stained quartzite or quartz vein fragment

Mostly quartz (SiO₂), with probable iron-oxide staining and minor feldspar or clay minerals

Tumbled quartz-rich pebble

Quartz, silicon dioxide (SiO₂), likely milky or included quartz

Iron-rich sulfide ore (likely pyrite-bearing rock)

Likely pyrite (FeS₂) with dark host rock; exact identification is uncertain from the image alone.

Gneiss with Quartz Vein

Metamorphic Gneiss

Likely dyed pink quartz or agate fragment

Quartz, SiO₂ (identity uncertain from the image)

Dark gneiss or migmatitic amphibolite

Band ed gneiss; composition likely quartz–feldspar–biotite/amphibole, possibly migmatite

Weathered quartz-rich metamorphic rock (probable gneiss or quartzite)

Biotite–quartz–feldspar gneiss, possibly micaceous quartzite

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Blue-gray calcite (likely cleavage specimen)

Calcite, CaCO₃

Weathered quartz-bearing rock, possibly porphyritic rhyolite

Likely altered rhyolite or dacite containing quartz and feldspar; exact identification requires testing

Quartz

Silicon Dioxide (SiO2)

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Milky quartz

Quartz, silicon dioxide (SiO₂)

Quartz (likely Clear Quartz or Rock Crystal)

Quartz (SiO2)

Quartz (likely a clear or rock crystal variety)

Quartz (SiO2 - Silicon Dioxide)

Quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite with minor iron-oxide inclusions