Metamorphic Rock (Variety Of Quartz)

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Igneous/Metamorphic Hybrid

Quartz with Mica Schist (Pegmatite Specimen)

SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)

Green Aventurine and Clear Quartz

Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartzite

Metamorphic rock (primarily SiO2)

Citrine Quartz

SiO2 (Silicon Dioxide with Iron impurities)

Quartzite

Quartzite (SiO2)

Fuchsite in Quartz (Aventurine Quartz)

K(Al,Cr)2(AlSi3O10)(OH)2 (Fuchsite) + SiO2 (Quartz)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz Vein in Schist

Quartz (SiO2) in Mica Schist

Clear Quartz (or Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Citrine

Yellow Quartz (SiO2)

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

Mineral, specifically a detrital grain

Quartz (likely) or a Quartzite Pebble

Silicon dioxide (SiO2) for quartz. If it's quartzite, it's a metamorphic rock primarily composed of quartz.

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky/Bull Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

SiO2 (Silicon Dioxide)

Greenschist (containing Epidote and Quartz)

Greenschist (Epidote-Chlorite-Actinolite Schist)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (likely milky/gray variety)

Quartz (SiO₂)

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Mineral in Igneous/Sedimentary host

Quartz Vein in Host Rock (Breccia/Rhyolite)

Silicon Dioxide (SiO2) with matrix

Quartz Druzy Geode

Silicon Dioxide (SiO2) - Crystalline Variety

Green Quartzite

Meta-quartzite with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)

Quartz vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Lithic Matrix

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Jasper or Chalcedony

Microcrystalline Quartz (SiO2)

sedimentary

Milky Quartz (polished heart)

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Clear Quartz)

Silicon Dioxide (SiO2)

Yellow Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Quartzite

Metamorphic Rock (Mainly SiO2)