Metamorphic (Localized) Or Sedimentary

Dragon Blood Jasper

Epidote with Red Piedmontite (Chalcedony/Quartz variant)

Tiger Iron

Tiger Iron (A complex combination of Hematite Fe2O3, Red Jasper SiO2, and Tiger's Eye SiO2/FeOOH)

Anthracite

Anthracite coal

Anthracite Coal

Anthracite (Carbon Content: 86%-97%)

Gneiss (Stream-worn Cobble)

Gneiss (Metamorphic rock composed primarily of Quartz, Feldspar, and Mica)

Green Schist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Gneiss (with Quartz and Mica)

Gneiss

Quartz-veined Schist (or Metasandstone)

Metamorphic Rock with Quartz Veining (SiO2)

River Stone (Granitic Gneiss)

Foliated Granitic Gneiss

Iron-Stained Quartzite

Recrystallized Meta-Quartzite (primarily SiO2)

White Marble

Calcite-rich Metasomatized Carbonate (CaCO3)

Quartzite with inclusions

Quartzite (primarily SiO2)

Copper-bearing Mica Schist

Mica Schist with Native Copper inclusions

Marble

Recrystallized Calcite Rock (CaCO3)

Gneiss

Metamorphic rock of high-grade regional metamorphism

Ferruginous Quartzite (Chert)

Quartzite with Iron inclusions (SiO2 + Fe2O3)

Gneiss

Gneiss (High-grade metamorphic rock)

Epidote

Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

Gneiss (High-grade Metamorphic Rock)

Gneiss (Metamorphic silicate rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartzite

Quartzite (primarily SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Ferruginous Quartz (Iron-stained Quartzite)

Silicon Dioxide (SiO2) with iron oxide inclusions

Gneiss

Gneiss (High-grade Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Gneiss

Gneiss

Almandine Garnet in Matrix

Almandine (Fe3Al2(SiO4)3)

Granite Gneiss

High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)

Titanium Coated Kyanite (Aura Kyanite)

Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

Gneiss (Granitic Gneiss)

Gneiss (from German Gneis, related to 'spark')

Quartzite River Rock (with Limonite staining)

Quartzite (SiO2)

Rough Garnet in Matrix

Almandine Garnet (Fe3Al2Si3O12)

Schist with Biotite Inclusion

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

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Multi-gemstone Quartz and Fluorite Bracelet

Silicon Dioxide (SiO2) and Calcium Fluoride (CaF2)

Quartz / Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Gold

Native Gold (Au)

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Banded River Cobble with Mafic Dike

Hydrothermally altered Graywacke or Sandstone with Mafic Intrusion