Metamorphic

Serpentinite

Serpentinite (complex silicate minerals including Mg3Si2O5(OH)4)

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (primarily SiO2)

Fairy Stone (Staurolite Twin)

Staurolite (Fe,Mg,Zn)2Al9Si4O22(OH)2

Quartzite

Quartzite (SiO2)

River Pebble (Quartzite/Sandstone mix)

Quartzite (primarily SiO2)

Quartz with Mica (Gneissic or Pegmatitic origin)

Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(F,OH)2)

Serpentine (variety: Serpentine Rock)

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

Green Aventurine

Silicon Dioxide (SiO2 with Fuchsite inclusions)

Garnet Schist

Almandine-Mica Schist

Slickenside

Tectonic Fault Scarp Surface

Mica Schist with Pyrite

Muscovite/Biotite Schist (Complex Silicate)

Quartzite Pebble (River Rock)

Quartzite (primarily SiO2)

Fulgurite

Fulgurite (Lechatelierite-rich variety)

Mica Schist

Mica Schist (predominantly composed of Muscovite or Biotite silicates)

Nephrite Jade

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

Charoite

K(Ca,Na)2Si4O10(OH,F)·H2O

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartzite

Quartzite (SiO2)

Yellow Quartzite

Quartzite (primarily SiO2)

Nephrite Jade

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

Quartzite

Quartzite (SiO2)

Pink Quartzite

Quartzite (SiO2 with iron oxide inclusions)

Yellow Quartzite (Beach Pebble)

Quartzite (primarily SiO2)

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Quartzite

Quartzite (SiO2)

Lapis Lazuli

Na8(Al6Si6O24)S2 (composed primarily of Lazurite, Calcite, and Pyrite)

Quartzite Pebble

Quartzite (primarily Silicon Dioxide, SiO2)

Schist

Mica Schist

Quartzite

Quartzite (chiefly SiO2)

Quartzite

Quartzite (primarily SiO2)

Nephrite Jade

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

Quartzite Pebble (River Rock)

Quartzite (mainly SiO2)

Red Quartzite (likely Purple/Red variety)

Quartzite (SiO2)

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

River Quartzite (River Rock)

Quartzite (SiO2)

Quartzite (River Pebble)

Meta-quartzite (composed primarily of SiO2)

Quartzite

Quartzite (SiO2)

Black Marble

Recrystallized Calcite (CaCO3)

Yellow Quartzite (River Pebble)

Quartzite (mainly SiO2)