Metamorphic, Likely Sedimentary With Quartz Veins

Quartz-bearing sulfide ore, possibly pyrite in altered host rock

Likely pyrite (FeS₂) with quartz and possibly calcite or carbonate gangue; exact identification requires testing

Tumbled quartz, likely milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz pebble

Silicon dioxide (SiO2)

Tumbled quartz-rich stone, likely milky quartz

Quartz (SiO₂), possibly iron-stained milky quartz or quartzite

White quartz pebble

Quartz (SiO₂), likely milky quartz

Quartz-rich rock, likely milky quartz

Quartz (silicon dioxide, SiO₂), possibly a quartzite fragment

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Mixed polished rock/mineral specimens

Indeterminate from image; likely quartz-bearing material with iron-oxide staining and possibly mica-rich schist

Pink Quartz / Rose Quartz

Silicon Dioxide (SiO2)

Milky quartz pebble

Quartz, silicon dioxide (SiO₂)

White Quartz

Silicon Dioxide (SiO2)

Milky quartz with iron-oxide staining

Quartz, silicon dioxide (SiO₂), likely massive or granular aggregate

Tumbled milky quartz pebble

Quartz (SiO₂), likely milky quartz

Milky quartz (iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Rounded quartz-rich pebble

Likely milky quartz or quartzite (SiO₂), identification uncertain from image

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in Slate/Schist

Quartz (Milky Quartz / Clear Quartz)

Silicon Dioxide (SiO2)

Likely quartz crystal sphere

Quartz (silicon dioxide, SiO₂), possibly included or coated quartz

Quartz-rich rock, likely quartzite or milky quartz fragment

Quartzite; predominantly quartz (SiO₂)

Milky quartz (likely rose/milky quartz)

Quartz, silicon dioxide (SiO₂)

Rounded quartz-rich pebble, likely milky quartz

Quartz (SiO₂), possibly weathered quartzite or chalcedony

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz (Small Fragment)

Silicon Dioxide (SiO2)

Polished white quartz-rich pebble

Microcrystalline quartz (SiO₂), likely milky quartz or quartzite

Slate with Quartz Vein

Foliated Metamorphic Rock (Mainly Quartz, Muscovite, Chlorite)

Quartz-rich metamorphic rock, likely mica schist or quartzite

Quartz (SiO₂) with mica, feldspar, and possibly iron-oxide staining

Milky quartz

Quartz (silicon dioxide, SiO₂)

Vein-bearing metamorphic rock, likely gneiss or schist

Quartz-feldspar–mica metamorphic rock; exact identification requires testing

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky Quartz with Chlorite/Mica inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Iron-rich quartz pebble

Quartz (SiO₂) with iron-oxide staining or inclusions; exact identification is uncertain from the photo

Milky Quartz

Quartz (SiO2)

Quartz-rich translucent fragment

Quartz, silicon dioxide (SiO₂), possibly chalcedony or vein quartz

Pale blue-gray quartz-rich pebble (tentative)

Quartz, SiO₂, possibly chalcedony or a weathered metamorphic fragment

Milky quartz (likely iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Drill-core rock, likely foliated metamorphic rock

Indeterminate from the photograph; possibly slate, phyllite, or schist

Milky quartz vein rock

Quartz, SiO₂, with iron-oxide staining and likely feldspar/mica host material

Clear Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Milky quartz-rich rock, likely quartzite or quartz vein material

Quartz (SiO₂), probably intergrown with feldspar and weathered mica/clay minerals

Tumbled pale green quartz (likely aventurine or common quartz)

Quartz, silicon dioxide (SiO₂); green color may result from fuchsite or chlorite inclusions

Quartz

Silicon Dioxide (SiO2)