Sedimentary Or Metamorphic

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Anthracite Coal

Anthracite (Carbon)

Quartzite

Quartzite (primarily SiO2)

Green Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Quartzite Pebble

Quartzite (primarily SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

River Quartzite Spheroid

Recrystallized Orthoquartzite (SiO2)

Quartzite with Iron Inclusions

Quartzite (largely SiO2) with Hematite/Limonite staining (Fe2O3)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Yellow Quartzite Pebble

Metamorphosed Sandstone (SiO2 with iron oxide impurities)

Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli

Lazurite (primary mineral component), (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Charoite

(K,Sr,Ba,Ca)15-16(Na,Ca)8(Si,Al)24O60(OH,F)4 · nH2O (Hydrated silicate of potassium, calcium, and sodium)

Unakite

Epidotized Granite

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartzite

Quartzite (SiO2)

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)