Metamorphic And Sedimentary

Green Aventurine

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

Quartzite (River Pebble)

Quartzite (SiO2)

Greenstone

Metabasalt / Chlorite-Epidote Schist

Quartzite

Quartzite (primarily SiO2)

Quartzite with Iron Inclusions

Quartzite (primarily SiO2 with Fe2O3 impurities)

Blue Quartzite

Silicon Dioxide (SiO2) with inclusions

Quartzite

Quartzite (primarily SiO2)

Shungite

Non-crystalline carbon (similar to anthracite coal or meta-anthracite)

Unakite (Epidotized Granite)

Epidotized Granite (mixture of Orthoclase, Epidote, and Quartz)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Quartzite

Quartzite (primarily SiO2)

Quartzite

Quartzite (SiO2)

Quartzite with Hematite staining

Quartzite (SiO2) with iron oxide inclusions (Fe2O3)

Quartzite

Quartzite (SiO2)

Yellow Quartzite (River Pebble)

Quartzite (primarily SiO2)

Lapis Lazuli

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartzite Pebbles (River Stones)

Quartzite (primarily Silicon Dioxide, SiO2)

Staurolite (Fairy Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Serpentine (New Jade)

Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)

Quartzite Pebble

Recrystallized Quartz (SiO2)

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite with Iron Hydroxide Staining

Quartzite (primarily SiO2) with Limonite/Goethite staining

Unakite

Unakite (Metasomatized Granite)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)

Quartzite

Metamorphosed Sandstone (SiO2 - Silicon Dioxide)

Quartzite

Quartzite (primarily SiO2)

Unakite

Unakite Lepidolite

Anthracite Coal

Anthracite

Anthracite Coal

Anthracite (Carbon Content 86–97%)

Serpentinite (Serpentine Rock)

Primarily composed of serpentine group minerals, such as antigorite, chrysotile, and lizardite. Chemical formula for serpentine minerals is (Mg,Fe)3Si2O5(OH)4.

Lapis Lazuli

Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, along with Calcite and Pyrite)

Serpentinite

Serpentinite (containing minerals of the Serpentine subgroup: Antigorite, Lizardite, and Chrysotile; formula (Mg,Fe)3Si2O5(OH)4)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Unakite

Unakite (Altered Granite)

Quartzite (River Siltstone variety)

Quartzite (SiO2)

Quartzite pebble

Quartzite (SiO2)

Quartzite Cobble

Quartzite (primarily SiO2)

Mica Schist

Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)

Lapis Lazuli (Low-grade/Calcite-heavy)

Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)