Metamorphic, Likely Sedimentary With Quartz Veins

Milky quartz (quartz-rich rock fragment)

Quartz, silicon dioxide (SiO₂)

Tumbled quartz-rich stone, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite (recrystallized quartz sandstone)

Milky quartz (likely rose quartz)

Quartz, silicon dioxide (SiO₂), commonly varietal rose quartz

Weathered quartz-rich rock, likely silicified limestone or quartzite

Microcrystalline quartz (SiO₂), possibly with calcite (CaCO₃) and iron-oxide staining

Quartz-rich gneiss

Foliated quartz–feldspar–mica gneiss, possibly migmatitic

Tumbled quartz-rich pebble

Quartz (SiO₂), likely milky quartz or quartzite fragment

Milky Quartz/White Quartz

Silicon Dioxide (SiO2)

Milky quartz with iron staining

Quartz (silicon dioxide, SiO₂), likely massive or vein quartz

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

Quartz (SiO₂)-dominant rock with iron-oxide minerals, chiefly hematite/goethite

Banded dark pebble (likely gneiss or banded metamorphic rock)

Indeterminate from the image; possibly banded gneiss

Tumbled quartz-rich pebble (likely milky quartz or quartzite)

Quartz, SiO₂; possibly quartzite, a metamorphic quartz aggregate

Milky quartz cluster

Quartz (silicon dioxide, SiO₂)

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

Quartzite (mostly SiO₂), with possible iron-oxide staining and minor feldspar/mica

Raw quartz (milky quartz), possibly iron-stained

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Polished pyrite specimen

Pyrite (FeS₂), cubic iron disulfide

Tumbled pale-green quartz, likely aventurine or common quartz

Quartz (SiO₂), possibly green aventurine containing fuchsite inclusions

Quartz pebble (likely milky quartz)

Quartz, SiO₂

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Quartz Vein Quartzite

Metamorphic Quartzite with Quartz Vein (SiO2)

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Weathered quartz-rich stone, likely milky quartz

Quartz (SiO₂), possibly a quartz-rich metamorphic or igneous fragment

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Quartz (Orange/Pink variety)

Silicon Dioxide (SiO2)

Graphitic schist

Graphite-rich pelitic schist; primarily quartz, mica, and graphite

Quartz-rich pebble, possibly milky quartz or quartzite

Quartz (SiO₂), potentially metamorphic quartzite

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz (vein quartz)

SiO2 (Silicon Dioxide)

Milky quartz (likely quartz-rich rock)

Quartz, silicon dioxide (SiO₂)

Quartz-bearing metamorphic rock, likely mica schist or gneiss fragment

Muscovite–biotite schist/gneiss with quartz and feldspar

Quartz (Clear Quartz / Rose Quartz)

Silicon Dioxide (SiO2)

Weathered quartz-bearing rock

Likely quartz-veined schist or gneiss; exact identification is uncertain from the image

Tumbled quartz-rich pebble, possibly jasper or quartzite

Microcrystalline quartz (SiO₂), likely quartzite or silicified rock

Rounded, foliated metamorphic pebble (likely schist)

Mica schist, composition uncertain from the image

Polished banded pebble, likely quartz-veined chert or jasper

Microcrystalline quartz (SiO₂), possibly chert/jasper with a quartz or chalcedony vein

Polished banded green stone, likely serpentine or altered volcanic rock

Probable serpentine-rich serpentinite; exact identification requires testing

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Quartz (Milky/Snow)

Silicon Dioxide (SiO2)

Iron-stained quartz or chert fragment

Quartz (SiO₂), possibly microcrystalline quartz/chert with limonite staining

White quartz pebble

Quartz (SiO₂), likely milky quartz

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

Quartz-dominant rock; chiefly SiO₂, with minor iron-oxide and mica/clay impurities

Milky quartz (likely quartz-rich vein fragment)

Quartz, silicon dioxide (SiO₂)

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz