Igneous Or Metamorphic

Yellow Quartzite

Silicon Dioxide (SiO2)

Orange Quartzite (Tumbled)

Quartzite (primarily SiO2 with trace Iron Oxide)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite Pebble (with Iron Staining)

Quartzite (mainly SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli

Lapis Lazuli (aggregate of Lazurite, Calcite, and Pyrite)

Quartzite

Quartzite (Primary mineral: SiO2)

Quartzite

Quartzite (primarily SiO2)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, Pyrite, and Calcite)

Blue Quartzite

Blue Quartzite (Primary mineral: Quartz, SiO2 with magnesio-riebeckite or crocidolite inclusions)

Yellow Quartzite (River Stone)

Quartzite (primarily SiO2)

Green Quartzite

Meta-quartzite with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)

Ferruginous Quartzite (Iron-stained Quartz)

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Fulgurite

Fulgurite (Lechatelierite)

Quartzite

Quartzite (SiO2)

Quartzite (River Stone)

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (SiO2)

Marble

Recrystallized Calcite / Dolomite (CaCO3)

Quartzite Pebble (River Rock)

Quartzite (primarily SiO2)

Staurolite (Fairy Stone)

Staurolite (formula: Fe2+2Al9Si4O23(OH))

Serpentine (Lizardite)

Serpentine subgroup, Mg3Si2O5(OH)4

Nephrite Jade

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

Red Quartzite / Metasandstone River Pebble

Quartzite (primarily SiO2 with hematite inclusions)

Nephrite Jade

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

Quartzite Pebble (River Rock)

Quartzite (SiO2)

Quartzite with Hematite staining

Quartzite (SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite

Quartzite (composed primarily of SiO2)

Quartzite (Orthoquartzite)

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Tiger's Eye

Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2

Quartzite with inclusions

Quartzite

River Quartzite or Chert Pebble

Quartzite (primarily Silicon Dioxide - SiO2)

Lapis Lazuli

Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2

Mica Schist

Mica Schist (primarily Muscovite or Biotite Schist)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Tiger Iron / Banded Iron Formation

Banded Iron Formation (SiO2 with Fe2O3 and FeOOH)

Charoite

Charoite - K(Ca,Na)2Si4O10(OH,F)·H2O

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)