Metamorphic Rock (Variety Of Quartz)

Milky quartz with iron-oxide staining

Quartz (silicon dioxide, SiO₂)

Quartzite

Quartzite (chiefly SiO2)

Quartzite

Quartzite (SiO2-dominant rock)

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Dark metamorphic rock, likely schist or slate fragment

Indeterminate foliated metamorphic rock; possibly mica schist or slate

Mixed quartz gemstone bead bracelet

Quartz, silicon dioxide (SiO₂), in varieties including smoky quartz, amethyst, rutilated quartz, and possibly tourmalinated quartz

Quartz (Milky Quartz)

Silicon Dioxide (SiO₂)

Red jasper in a gray host rock (likely jasperized volcanic rock)

Microcrystalline quartz (SiO₂), iron-oxide–colored jasper, in a fine-grained volcanic or sedimentary matrix

Quartz Vein in Amphibolite / Gneiss

Quartz (SiO2) in Mafic Metamorphic Host Rock

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss

Gneiss (Metamorphic Rock)

Tumbled quartz (likely rose quartz or included quartz)

Quartz, silicon dioxide (SiO₂)

Quartzite

Quartz-rich metamorphic rock; chiefly SiO₂ (quartz)

Quartz (Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Quartzite

Quartzite (primarily SiO2)

Tumbled jasper (likely yellow/brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and clay inclusions

Milky quartz pebble

Quartz, silicon dioxide (SiO₂), cryptocrystalline-to-coarse crystalline aggregate

Milky Quartz

Silicon Dioxide (SiO2)

Agate

Cryptocrystalline quartz (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Weathered gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica assemblage; exact identification requires a fresh surface or testing

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartzite pebble

Quartzite (SiO2)

Weathered quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), likely with iron-oxide and chlorite/serpentine staining

Quartzite

Quartzite (composed primarily of SiO2)

Weathered quartz-bearing rock, possibly gneiss or quartzite

Indeterminate; likely quartz-rich metamorphic rock containing quartz and feldspar

Quartz-bearing weathered rock

Massive to drusy quartz (SiO₂), possibly in a feldspathic or carbonate host

Rounded quartz-rich pebble, possibly weathered granite or quartzite

Indeterminate; likely quartz (SiO₂)-rich silicate rock

Banded Gneiss

Gneiss (Metamorphic Rock)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Gneiss

Banded gneiss; typically quartz–feldspar–mica assemblage

Pyrite

Iron Sulfide (FeS2)

Quartz (Milky/Smoky Quartz)

Silicon Dioxide (SiO2)

Quartz (Milky or Clear variety)

Silicon Dioxide (SiO2)

Dalmatian Stone

Aplite (often incorrectly called Dalmatian Jasper)

Weathered quartz-rich metamorphic rock, likely quartzite

Quartzite, composed predominantly of quartz (SiO₂), possibly with feldspar and mica impurities

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline SiO₂, possibly with mica or iron-oxide impurities

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)