Metamorphic, Likely Sedimentary With Quartz Veins

Likely biotite-bearing metamorphic rock (schist or gneiss)

Mica schist/gneiss; chiefly quartz, feldspar, and biotite mica

Quartzite Pebble

Quartzite

White Quartz

Silicon Dioxide (SiO2)

Tumbled yellow quartz-rich stone, likely yellow jasper or quartzite

Jasper/quartzite; mainly microcrystalline quartz (SiO₂), with iron-oxide staining

Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)

Quartz variety (SiO2) / Polycrystalline Quartz Aggregate

Quartz-veined Mudstone or Argillite

SiO2 (Quartz) in Siltstone/Mudstone matrix

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Quartzite pebble with Quartz vein

Quartzite (SiO2)

Weathered quartz-rich cobble (likely quartzite or vein quartz)

Quartzite, predominantly SiO₂; possibly weathered vein quartz

Blue Apatite

Calcium Fluorophosphate (Ca5(PO4)3F)

Quartz (Milky/Iron-stained)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Yellow Quartz (Citrine/Yellow Chalcedony)

Silicon Dioxide (SiO2)

Weathered quartz-rich cobble, possibly granitic gneiss

Probable quartz–feldspar–mica aggregate; exact lithology uncertain from image

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Likely foliated metamorphic rock, possibly schist

Mica schist or micaceous quartzite; exact identification is uncertain from the photograph

Quartzite with Chert inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Quartz (Clear Quartz / Rose Quartz)

Silicon Dioxide (SiO2)

White Quartz

Silicon Dioxide (SiO2)

White Buffalo Turquoise (or Howlite/Magnesite)

Calcite/Dolomite or Magnesite with Chert/Quartz inclusions

Chert (often called Jasper or River Siltstone)

Microcrystalline Quartz (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Granite or granitic gneiss pebble

Felsic granitoid, chiefly quartz, feldspar, and mica; exact identification is uncertain from the photograph

Quartz Boulder

Silicon Dioxide (SiO2)

Small polished pink-and-white mineral pebble

Likely rose quartz or pale pink quartz; exact identification is uncertain from the image

Quartz Crystal Cluster / Quartzite

Silicon Dioxide (SiO2)

Clear Quartz (Faceted)

Silicon Dioxide (SiO2)

Tumbled quartz-rich rock, likely quartzite or milky quartz with iron-oxide staining

Quartzite (primarily SiO₂), possibly with hematite/goethite staining and minor feldspar or mica

Serpentine with quartz or calcite vein

Serpentinite; mainly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with a pale quartz/calcite vein

Milky Quartz

Silicon Dioxide (SiO2)

White Quartz Pebble

Silicon Dioxide (SiO2)

Weathered metamorphic rock, likely gneiss or schist

Indeterminate foliated silicate rock; commonly quartz–feldspar–mica assemblage

Quartzite River Stone

Metamorphosed Quartz-rich Sandstone (SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz (Iron-Stained)

Silicon Dioxide (SiO2)

Milky Quartz in Matrix

Silicon Dioxide (SiO2)