Metamorphic

Quartzite Pebbler

Quartzite (primarily SiO2)

Nephrite Jade

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

Quartzite with Quartz Veins

Quartzite (chiefly SiO2)

Quartzite

Quartzite (chiefly SiO2)

Quartzite (Iron-stained)

Quartzite (mostly SiO2 with Fe2O3 impurities)

Unakite

Epidotized Granite

Banded Gneiss

Gneiss (variable mineral composition)

Quartzite Pebble

Quartzite (SiO2)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, e.g., Antigorite, Lizardite, Chrysotile)

Mica Schist

Muscovite/Biotite Schist

Quartzite

Quartzite (SiO2)

Serpentine

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

Marble

Recrystallized Calcite (CaCO3)

Yellow Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite River Pebble

Quartzite (primarily SiO2)

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Schist

Mica Schist (variety: Muscovite/Biotite Schist)

Tiger's Eye

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

White Marble

Recrystallized Calcite (CaCO3)

Quartzite

Quartzite (primarily SiO2)

Quartzite (Nodule)

Quartzite (SiO2)

Mica Schist

Mica Schist (primarily Muscovite and Quartz composition)

Orange Quartzite (or Ferruginous Quartz)

Quartzite (primarily Silicon Dioxide, SiO2)

Quartzite (Yellow/Iron-stained Quartz)

Quartzite (primarily SiO2 with iron oxide impurities)

Schist

Mica Schist

Orange Quartzite (River Pebble)

Quartzite (SiO2 with Iron Oxide inclusions)

Quartzite (River-worn pebble)

Quartzite (Mainly SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Greenstone (Epidosite or Altered Basalt)

Epidosite (Ca2(Al, Fe)3(SiO4)3(OH))

Smoky Quartz and Biotite Schist

Quartz-Biotite Schist (SiO2 + K(Mg,Fe)3AlSi3O10(F,OH)2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (predominantly SiO2)

Quartzite

Quartzite (primarily SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Gneiss (specifically Banded Gneiss)

Gneiss

Nephrite Jade

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

Nephrite Jade (River Cobble)

Nephrite (Silicate mineral: Ca2(Mg, Fe)5Si8O22(OH)2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebbles

Meta-quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Greenstone (Epidote/Chlorite-rich Metabasalt)

Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))

Quartzite

Quartzite (primarily SiO2)