Metamorphic (Likely Gneiss Or Schist Based On Texture)

Biotite Schist

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

Kyanite

Kyanite (Al2SiO5)

Biotite-rich schist (likely mica schist)

Mica schist; predominantly biotite mica with quartz and feldspar

Gneiss (likely granitic gneiss)

Foliated quartz–feldspar gneiss, commonly derived from granite

Likely schist with quartz-rich fragments

Mica schist, likely biotite schist; exact identification is uncertain from the image

Mica Schist

Schist (primarily muscovite and quartz)

Schist, possibly garnet-mica schist

Mica schist; chiefly muscovite/biotite mica, quartz, and feldspar, with possible garnet or sulfide grains

Dark, mica-rich metamorphic rock (possibly schist)

Mica schist, tentatively; exact identification is limited by the small, partly obscured specimen

River Pebble (Gneiss or Quartzite mixture)

Metamorphic rock (Commonly Gneissic)

Banded gneiss pebble

Gneiss, commonly quartz–feldspar–biotite gneiss

Staurolite

Staurolite (Fe2+2Al9Si4O23(OH))

Mica Schist

Metamorphic rock predominantly composed of muscovite or biotite with quartz and feldspar

Garnet (Almandine)

Almandine Garnet (Fe3Al2(SiO4)3)

Blue Kyanite

Kyanite (Al2SiO5)

Foliated schist, likely mica schist

Mica schist; chiefly quartz (SiO₂), muscovite/biotite mica, and feldspar

Limonite-stained mica schist

Muscovite–quartz schist with iron-oxide alteration (FeO(OH)·nH₂O)

Possible weathered granite or gneiss

Feldspar–quartz–mica rock; exact identification is uncertain from the photograph

Biotite–quartz–feldspar schist

Mica schist; chiefly quartz (SiO₂), feldspar, and biotite mica

Gneiss

Gneiss (High-grade regional metamorphic rock)

Likely banded gneiss or mica-rich metamorphic pebble

Gneiss; composition likely quartz, feldspar, and biotite/muscovite mica

Black Tourmaline

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)

Soapstone (talc-rich schist)

Talc schist; chiefly hydrated magnesium silicate, Mg₃Si₄O₁₀(OH)₂

Foliated metamorphic rock, likely mica schist

Mica schist, probably muscovite–biotite schist with quartz and feldspar

Ruby / Red Corundum

Al2O3 (Aluminum Oxide with Chromium trace)

Biotite–quartz–feldspar gneiss

Gneiss, composed chiefly of quartz (SiO₂), feldspar, and dark mica, likely biotite

Likely biotite-rich metamorphic rock (mica schist)

Mica schist, chiefly quartz + biotite mica; possible pyrite or sulfide grains

Mica Schist

Mica Schist (primarily Muscovite and Biotite)

Mica Schist

Mica Schist (Quartz-Mica Metamorphic Rock)

Banded metamorphic rock, likely schist or gneiss

Foliated quartz–feldspar–mica rock; exact mineral identification requires sampling

Schorl (Black Tourmaline)

Sodium iron aluminum borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)

Raw Garnet Fragment

Nesosilicate Group (e.g., Almandine, Fe3Al2(SiO4)3)

Sapphire

Corundum (Al2O3)

Blue Quartz (specifically Dumortierite Quartz)

SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)

Likely gneiss

Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole

Mica Schist

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

Fuchsite Gneiss or Schist

Muscovite (variety Fuchsite) within Metamorphic Host Rock

Gneiss (Hornblende/Biotite Gneiss)

Foliated Metamorphic Rock (Quartz-Feldspar-Amphibole/Mica matrix)

Garnet

Garnet Group (often Pyrope or Almandine); X3Y2(SiO4)3

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Mica Schist

Muscovite/Biotite Schist

Muscovite Schist

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

Mica Schist

Schist (Biotite/Muscovite dominant)