Metamorphic

Quartzite with Iron Inclusions

Metamorphic Silicon Dioxide (SiO2) with impure Limonite/Hematite

Banded Gneiss

Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)

Coal (Anthracite)

Anthracite (Carbon-based organic sedimentary/metamorphic rock)

Slate

Metamorphosed Shale (Fine-grained Foliated Metamorphic Rock)

Schist (Biotite/Mica Schist)

Medium-grade regional metamorphic rock (rich in Phyllosilicates)

Cloudy Quartz with Mica inclusions

Silicon Dioxide (SiO2) with accessory Muscovite KAl2(AlSi3O10)(OH)2

Quartzite

Quartzite (chiefly SiO2)

Quartzite

Quartzite (SiO2)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Schist (Garnet-Mica Schist)

Garnetiferous Mica Schist (primarily Muscovite/Biotite and Almandine Garnet)

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

Schist (Biotite Schist)

Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)

Quartzite

Quartzite (primarily SiO2)

Unakite (Tumbled)

Unakite (altered granite)

Epidosite

Epidosite (composed primarily of Epidote and Quartz)

White Jade (Nephrite)

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

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Lapis Lazuli

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

Marble (Fire and Ice or Pink Veined)

Metamorphosed Limestone (principally CaCO3)

Dragon Blood Jasper

Epidote-containing Quartz Chalcedony (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))

Red Quartzite

Metamorphosed Quartz Sandstone (SiO2 with Iron Oxide impurities)

Green Quartzite (or Aventurine)

SiO2 (Silicon Dioxide) primarily, with Fuchsite inclusions (K(Al,Cr)2AlSi3O10(OH)2)

Garnet Rhyolite

Rhyolite (high-silica volcanic rock) with almandine/spessartine garnet

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Quartzite (specifically Pink or Red Quartzite)

Metamorphosed Quartz Sandstone (SiO2)

Greenstone / Greenstone Pebble

Greenschist (metamorphosed basalt or gabbro)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Cobble

Metamorphosed Quartz Sandstone (primarily SiO2)

Gneiss

Gneiss

Quartzite

Quartzite

Green Quartzite (Aventurine variety)

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)

Quartzite Pebble

Quartzite (primarily SiO2)

Mica Schist with Iron Staining

Muscovite/Biotite Schist

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Magnetite

Magnetite (Fe3O4)

Quartzite

Quartzite (SiO2)

Blue Quartzite

Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite), SiO2

White Marble

Recrystallized Calcite (CaCO3)

Green Aventurine (Quartzite)

Silicon Dioxide (SiO2) with inclusions of Fuchsite (Mica)