Metamorphic (Likely Gneiss Or Schist Based On Texture)

Schist

Schist

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Mica Schist

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

Sandstone (with biological crust)

Arenite (SiO2 based)

Blue Star Sapphire

Corundum (Al2O3)

Garnet (specifically Almandine or Pyrope)

Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)

Corundum (Ruby/Sapphire crystal)

Al2O3 (Aluminum Oxide)

Quartz Mica Schist

Mica-Quartz Schist (Chemical: SiO2 + KAl2(AlSi3O10)(OH)2)

Schist (Micaceous Schist)

Micaceous schist (Mainly Muscovite/Biotite mixed with Quartz)

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)

Sandstone (likely Calcareous or Quartz-rich)

Arenite (SiO2 based typically)

Orange Quartzite / Carnelian Agate

Silicon Dioxide (SiO2)

Ruby (Corundum)

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Blue Sapphire (likely costume glass imitation)

Corundum (Al2O3) with iron/titanium impurities

Gneiss

Gneiss (High-grade metamorphic rock)

Graphite

Graphite (Carbon, C)

Mica Schist

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

Biotite Schist

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

Folded Schist / Gneiss (Metamorphic Rock)

Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 in Matrix)

Red Garnet

Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)

Staurolite (Fairy Cross)

Staurolite (Fe2+2Al9Si4O23(OH))

Biotite Schist

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

Almandine Garnet

Iron aluminum silicate (Fe3Al2(SiO4)3)

Blue Sapphire

Corundum (Al2O3)

Mica Schist

Mica Schist (Predominantly Muscovite/Biotite)

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety, likely a orthogneiss or paragneiss depending on parent rock)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Gneiss with Quartz Veining

Gneiss (High-grade regional metamorphic rock)

Corundum (Ruby variety)

Aluminium oxide (Al2O3)

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Golden Mica Schist

Mica Schist (primarily Muscovite/Biotite with Quartz)

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)

Sandstone (likely Quartz Sandstone)

Arenite (SiO2 based)

Glacial Cobble (likely Granitic or Gneissic)

Granite/Gneiss Glacial Erratic

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Gneiss

High-grade foliated metamorphic rock

Gneiss (with Quartzite and Biotite)

Gneiss containing SiO2 (Quartz), K(Mg,Fe)3AlSi3O10(OH)2 (Biotite), and (K,Na,Ca)AlSi3O8 (Feldspar)

Blue Kyanite

Kyanite (Al2SiO5)

Orthoclase Feldspar (Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Schist

Mica Schist