Metamorphic Mineral

Bornite

Bornite (Cu5FeS4)

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

Tiger's Eye (Brown/Golden)

Silicon dioxide (Quartz pseudomorph after crocidolite), SiO2

Pyrite

Iron Disulfide (FeS2)

Rhodolite Garnet

Mg3Al2(SiO4)3 - Fe3Al2(SiO4)3 (Pyrope-Almandine series)

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide with inclusions (SiO2)

Bornite

Bornite (Cu5FeS4)

Bornite

Bornite (Cu5FeS4)

Eagle Eye / Grey Tiger Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Garnet in Matrix (likely Almandine in Quartz/Mica Schist)

Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock

Biotite Schist

Biotite Gneiss/Schist (approximate formula K(Mg,Fe)3AlSi3O10(OH)2)

Small rounded mineral/rock fragment

Indeterminate; possibly quartz-rich stone or feldspar

Likely greenstone (altered basalt)

Chlorite–actinolite-bearing metabasalt; identification is tentative from the image

Banded Serpentine

Serpentine group (subgroup Lizardite or Antigorite) - Mg3Si2O5(OH)4

Likely amphibolite

Amphibolite, composed mainly of hornblende and plagioclase feldspar

Uncertain small stone; possibly weathered quartz-bearing rock

Indeterminate from image; candidate materials include quartz-rich pebble or altered silicate rock

Epidote

Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Quartz (Yellow/Citrine Variety)

Silicon Dioxide (SiO2)

Fuchsite

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

Fuchsite

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

Biotite (Mica)

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

Gneiss

Gneiss; a foliated metamorphic rock commonly composed of quartz, feldspar, and mica

Likely mica-rich schist

Mica schist, probably muscovite- and/or biotite-bearing; exact identification requires closer examination

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite mica

Slate

Slate (Metamorphic Rock)

Pink potassium feldspar (orthoclase/microcline)

KAlSi₃O₈; likely massive potassium feldspar, possibly with quartz

Banded gneiss

Gneiss, commonly quartz–feldspar–biotite gneiss

Likely biotite-rich schist or gneiss

Mica schist/gneiss; chiefly quartz, feldspar, and biotite mica

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Blue Kyanite

Kyanite (Al2SiO5)

Likely garnet-bearing schist or gneiss

Mica schist/gneiss containing quartz, feldspar, mica, and possible almandine garnet

Gneiss

High-grade Metamorphic Gneiss

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2 (Actinolite-Tremolite series)

Quartzite

Metamorphic Quartzite (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Banded gneiss pebble

Gneiss, likely quartz–feldspar–mica gneiss

Schist

Mica Schist

Dark gneiss or migmatitic amphibolite

Band ed gneiss; composition likely quartz–feldspar–biotite/amphibole, possibly migmatite

Polished banded metamorphic stone, likely gneiss or quartzite

Banded quartz–feldspar–mica rock; precise identification requires testing

Likely garnet (rough crystal)

Garnet group; possibly almandine, (Fe₃Al₂(SiO₄)₃)