Sedimentary Or Metamorphic

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)

Serpentine

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

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)

Pink Quartzite

Quartzite (primarily SiO2)

Quartzite (River Cobble)

Metamorphosed Quartz Sandstone (SiO2)

Lapis Lazuli

Lapis Lazuli (Aggregate of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Pyrite, and Calcite)

Red Quartzite River Pebble

Quartzite (SiO2 with iron oxide inclusions)

Banded Quartzite River Pebble

Metamorphosed Quartz-rich Sandstone (SiO2)

Unakite

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)

Nephrite Jade (Pounamu)

Nephrite [Ca2(Mg, Fe)5Si8O22(OH)2]

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Unakite

Epidotized Granite

Unakite

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

Quartzite Pebble

Quartzite (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with Iron Oxide)

Unakite

Epidotized Granite

Serpentine

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

Lapis Lazuli

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

Yellow Quartzite River Stone

Quartzite (primarily SiO2)

Petrified Wood (Agatized/Silicified Wood)

Silicified Wood (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Glaucophane-bearing Schist (Blueschist)

Blueschist (Glaucophane-Lawsonite Schist)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite