Igneous And Metamorphic

Nephrite Jade

Tremolite-Actinolite solid solution series (Ca2(Mg,Fe)5Si8O22(OH)2)

Quartzite

Quartzite (composed primarily of SiO2)

Quartzite

Quartzite (SiO2)

Cinnabar in Dolomite or Quartz (Cinnabrite)

Mercury sulfide (HgS) in Dolomite (CaMg(CO3)2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (SiO2)

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Quartzite Pebble (with possible inclusion)

Metamorphosed Quartz Sandstone (SiO2 with impurities)

Banded Serpentine

Serpentinite (Mg3Si2O5(OH)4)

Quartzite

Quartzite (primarily SiO2)

Red Quartzite / River Siltstone

Quartzite (SiO2 with iron oxide inclusions)

Quartzite

Quartzite (SiO2)

Mica Schist

Mica Schist (primarily Muscovite or Biotite-rich sequence)

Quartzite

Quartzite (SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Anthracite Coal

Anthracite

Quartzite River Rock

Quartzite

Quartzite

Quartzite (SiO2)

Quartz Vein in Host Rock

Crystalline Silicon Dioxide (SiO2) in Pelitic or Shaly Matrix

Quartzite

Quartzite (primarily SiO2)

Pink Quartzite

Metamorphosed Quartz Sandstone (SiO2 with iron oxide inclusions)

Quartzite

Quartzite (SiO2)

Nephrite Jade

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

Quartzite

Quartzite (SiO2)

Marble

Recrystallized Calcite / Metamorphosed Limestone (CaCO3)

Unakite or Red Jasper in Epidote

Unakite (Metasomatized Granite)

Quartzite with inclusions

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Green Tiger's Eye

Silicified Crocidolite (Quartz variety, SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Anthracite

Anthracite coal

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Quartzite with Vugs

Metamorphosed Quartz Sandstone (SiO2)