Metamorphic And Sedimentary

Pink Quartzite

Quartzite (primarily SiO2 with trace Fe2O3)

Unakite (Epidote with Quartz and Feldspar)

Unakite (Metasomatized Granitic Rock)

Quartzite with Quartz Vein

Metamorphosed sandstone (SiO2)

Unakite

Epidotized Granite

Unakite

Unakite (an altered granite composed of Epidote, Orthoclase, and Quartz)

Serpentine

Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4

Unakite

Epidotized Granite

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Quartzite Pebble

Quartzite (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron Oxide)

Glaucophane-bearing Schist (Blueschist)

Blueschist (Glaucophane-Lawsonite Schist)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Greenschist

Greenschist (Chlorite-actinolite schist)

Unakite

Unakite Epidosite (composite of Epidote, Orthoclase, and Quartz)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Red Quartzite (Strawberry Quartz)

Quartzite (SiO2 with iron oxide inclusions)

Petrified Wood

Silicified Wood (SiO2)

Quartzite

Quartzite (composed primarily of Quartz, SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Yellow Aventurine (Quartz Quartzite)

Silicon Dioxide with Mica inclusions (SiO2 + KAl2(AlSi3O10)(OH)2)

Pink Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (predominantly Lazurite)

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood (SiO2)

Yellow Quartzite River Stone

Quartzite (primarily SiO2)

Verde Antique Marble (Serpentinite)

Serpentinite (composed mainly of Serpentine group minerals, Mg3Si2O5(OH)4)

Unakite (Epidotized Granite)

Unakite (Rock composed of Epidote Ca2(Al,Fe)3(SiO4)3(OH), Orthoclase KAlSi3O8, and Quartz SiO2)

Anthracite Coal

Anthracite

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite (Water-Worn)

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Ruby in Fuchsite

Corundum (Al2O3) in Chrome-Mica (KAl2(AlSi3O10)(OH)2)

Fulgurite

Fulgurite (Lechatelierite), amorphous SiO2

Quartzite

Quartzite (principally SiO2)

Anthracite

Anthracite (highest-grade coal)

Yellow Aventurine

Quartzite with inclusions (SiO2)