Metamorphic Rock

Quartzite Pebble

Metamorphic rock primarily composed of Quartz (SiO2)

Mica Schist

Metamorphic rock dominated by muscovite and/or biotite mica

Gneiss (Gneissic Granite Pebble)

Metamorphic rock rich in Quartz, Feldspar, and Mica

River Pebble (Gneiss / Granitic Schist)

Metamorphic Rock (Quartz-Feldspar-Mica assembly)

Quartzite

Metamorphic rock consisting largely of Quartz (SiO2)

Quartzite

Metamorphic rock primarily composed of Quartz (SiO2)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Quartzite Pebble

Metamorphic Rock (chiefly Silicon Dioxide, SiO2)

Banded Gneiss with Quartz Vein

Gneiss (High-grade Regional Metamorphic Rock)

Marble

Metamorphic rock primarily composed of Calcite (CaCO3)

Quartzite (River Pebble)

Metamorphic rock consisting primarily of Quartz (SiO2)

Mica Schist

Foliated Metamorphic Rock (rich in Muscovite or Biotite)

Gneiss with Quartz Veining

Gneiss (High-grade regional metamorphic rock)

Quartzite

Metamorphic rock primarily composed of Quartz (SiO2)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Marble (Carrara style)

Recrystallized Calcite-rich Metamorphic Rock (CaCO3)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

High-grade regional metamorphic rock (Foliated)

Granite Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Lapis Lazuli

Lazurite-rich metamorphic rock (complex silicate)

Gneiss (Metamorphic Cobble)

Gneiss (High-grade Regional Metamorphic Rock)

Quartzite Pebble

Metamorphic rock predominantly composed of Quartz (SiO2)

Anthracite Coal

Anthracite (Carbon-rich Sedimentary-to-Metamorphic Rock)

Quartzite

Metamorphic rock primarily composed of Quartz (SiO2)

Gneiss

Gneiss (High-grade regional metamorphic rock)

Gneiss (specifically a Banded Gneiss pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Granite Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Banded Gneiss

Gneiss (quartz-feldspar-biotite metamorphic rock)

Gneiss (specifically Micaceous Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

River Cobble (Quartzite / Sandstone Gravel)

SiO2 (Quartz-rich sedimentary/metamorphic rock)

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

Graphite-rich schist (likely graphite ore)

Graphite-bearing schist; predominantly graphitic carbon (C) with mica, quartz, and possible feldspar

Quartz (pebble)

Quartz (SiO₂)

Mica Schist

Mica Schist (Quartz-Mica Metamorphic Rock)

Granite Gneiss

Gneiss (High-grade regional metamorphic rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)