Metamorphic

Quartzite

Quartzite (composed primarily of SiO2)

Serpentinite

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

Pink Quartzite

Quartzite (SiO2 with minor iron oxide impurities)

Quartzite Pebble

Quartzite (principally SiO2)

Zebra Jasper

Silicon Dioxide (SiO2) with iron oxide and manganese inclusions

Serpentinite

Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)

Soapstone (Talc Schist)

Steatite

Unakite (or Epidotized Granite)

Epidotized Granite (Composition: KAlSi3O8, Ca2(Al,Fe)3(SiO4)3(OH), SiO2)

Healer's Gold (Pyrite/Magnetite in Serpentine)

Magnetite (Fe3O4) and Pyrite (FeS2) in Lizardite/Antigorite [Mg3Si2O5(OH)4]

Tiger's Eye

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

Blue Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Nephrite Jade

Nephrite (a variety of the Calcium magnesium iron silicate mineral series Actinolite), Ca2(Mg, Fe)5Si8O22(OH)2

Unakite

Epidotized Granite

Nephrite Jade

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

Quartzite with Hematite

Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 inclusions)

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Greenstone (Rough Jadeite or Nephrite)

Sodium aluminum silicate (Jadeite) / Calcium magnesium iron silicate (Nephrite)

Red Quartzite

Quartzite (primarily SiO2)

Red aventurine

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

Petrified Wood

Silicified Wood (primarily SiO2)

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Unakite

Epidotized Granite

Quartzite

Quartzite (SiO2)

Shungite

Non-crystalline carbon (allotrope of carbon)

Quartzite

SiO2 (Crystalline Quartz)

Yellow Quartzite (River Pebble)

Silicon Dioxide (Metamorphosed Sandstone), SiO2

Soapstone mushroom decorative carving

Steatite (Hydrous magnesium silicate, Mg3Si4O10(OH)2)

Quartzite

Quartzite (SiO2)

Anyolite (Ruby in Zoisite)

Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))

Quartzite

Quartzite (primarily SiO2)

Yellow Quartzite

Metamorphosed Quartz (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite (River Cobble)

Quartzite (mostly SiO2)

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 in Matrix)

River Rock (Quartzite)

Quartzite (SiO2)

Lapis Lazuli (polished cabochon/sphere)

Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)

Quartzite River Rock

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Quartzite with Iron Mineral Banding

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) staining

Lapis Lazuli

Lapis lazuli (a rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Green Aventurine

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

Greenstone (Metabaltic/Greenschist)

Chlorite schist / Meta-basalt