Mineral In Metamorphic Rock

Coarse-grained metamorphic rock, likely gneiss

Biotite–quartz–feldspar gneiss (tentative; exact identification requires testing)

Quartz Crystal

Silicon Dioxide (SiO2)

Granitic Gneiss

Gneiss (High-grade metamorphic rock)

Quartz Vein / Quartz Matrix

Silicon Dioxide (SiO2)

Likely amphibolite

Amphibolite, composed mainly of hornblende and plagioclase feldspar

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within metamorphic/igneous matrix

Small pale mineral/rock fragment

Indeterminate; possibly weathered quartz, calcite, or light-colored limestone

Gneiss

Gneiss (High-grade metamorphic rock)

Quartz Vein in Host Rock

Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)

Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Rhodochrosite

Manganese Carbonate (MnCO3)

Likely slate

Slate, a fine-grained metamorphic rock composed mainly of clay-derived mica minerals and quartz

Weathered schist or gneiss fragment

Quartz–feldspar–mica metamorphic rock; likely mica schist or gneiss

Quartz Vein in Schist / Gneiss

Silicon Dioxide (SiO2) in Metamorphic Matrix

Small metallic-looking rock fragment

Uncertain; possibly galena-bearing ore or mica-rich schist

Slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Banded dark pebble (likely gneiss or banded metamorphic rock)

Indeterminate from the image; possibly banded gneiss

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Green Quartz (Aventurine or Prase)

Silicon Dioxide (SiO2) with inclusions

Ruby in Zoisite

Anyolite (composite of Corundum and Zoisite)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz vein in weathered host rock

Quartz (SiO₂), likely in a weathered metamorphic or igneous matrix

Pebble

Clast (specifically a granule or small pebble)

Gneiss

Gneiss (SiO2-rich metamorphic rock)

Epidote (Greenstone)

Calcium aluminum iron silicate hydroxide Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)

Greenschist (likely chlorite schist)

Greenschist-facies metamorphic rock; commonly quartz + chlorite ± actinolite, epidote, albite, and mica

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg, Fe)3Si2O5(OH)4

Garnet (Almandine)

Fe3Al2(SiO4)3

Milky Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Dumortierite in Quartz

Silicon Dioxide with Aluminium Borosilicate (SiO2 + (Al,Fe7+)7(BO3)(SiO4)3O3)

Gneiss (specifically Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Clear Quartz

Silicon dioxide (SiO2)

Quartz Crystal Point

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Iron-stained garnet-bearing rock, possibly almandine garnet

Garnet-group silicate, likely almandine (Fe₃Al₂Si₃O₁₂), in a quartz–iron-oxide matrix

Magnetite

Magnetite (Fe3O4)

Blue Tiger's Eye

Crocidolite in Quartz (altered)