Metamorphic Rock (Variety Of Quartz)

Banded quartz-rich metamorphic rock (likely quartzite or quartz-mica schist)

Quartzite/schist composed chiefly of SiO₂ quartz with mica, feldspar, and iron-oxide or copper-colored accessory minerals

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky/Granular variety)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Common Milky Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky/Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Raw Crystal)

Silicon Dioxide (SiO2)

Milky Quartz on Matrix

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Banded gneiss

Quartz–feldspar gneiss, possibly biotite-bearing; exact identification requires testing

Quartzite (iron-stained, possibly metaconglomeratic)

Quartzite; predominantly recrystallized quartz (SiO₂) with iron-oxide accessory minerals

Aventurine

Quartz (Aventurine variety)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Unakite Gneiss

Metasomatic Granitoid (variety Unakite)

Green Aventurine

Aventurine (variety of Quartz - SiO2)

Weathered quartz-rich pebble, possibly quartzite or chert

Quartz (SiO₂), possibly quartzite; exact identification is uncertain from the image

Agate (within host rock)

Agate (Quartz variety SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

SiO2

Clear Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Tumbled quartz pebble, likely iron-stained quartz

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartzite

Quartzite (SiO2)

Polished tiger’s-eye (likely iron-rich quartzite)

Quartzite composed mainly of SiO₂, with fibrous crocidolite pseudomorphs oxidized to iron oxides

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Milky quartz vein rock

Quartz (SiO₂), massive milky variety

Rose quartz

Quartz (silicon dioxide, SiO₂), pink variety

Quartz (Milky Quartz / Quartz Specimen)

Silicon Dioxide (SiO2)

Mixed Mineral Collection (with Quartz, Beryl, and host rock)

Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite

Weathered granite or granitic pegmatite fragment

Felsic intrusive rock composed mainly of quartz, feldspar, and minor mica

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

Quartz (SiO₂), potentially quartzite with iron-oxide staining

Quartz / Rock Crystal

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Polished brecciated jasper (likely ocean jasper or orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide and other mineral inclusions

Likely quartz-bearing granite or pegmatite fragment

Granite/pegmatite, chiefly quartz (SiO₂) with feldspar and possibly mica