Mineral (Metamorphic Pseudomorph)

Blue Apatite

Apatite, Ca5(PO4)3(F,Cl,OH)

Banded gneiss pebble

Biotite–quartz–feldspar gneiss (composition variable)

Tumbled or weathered gneiss

Feldspar–quartz–mica gneiss (composition variable)

Yellow Aventurine (Yellow Quartzite)

Silicon Dioxide (SiO2) with inclusions

Prehnite

Ca2Al(AlSi3O10)(OH)2

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂); if quartzite, recrystallized quartz sandstone

Dark gray metamorphic rock fragment

Likely slate or fine-grained schist; mineral composition cannot be confirmed from the image

Greenstone

Metamorphic Greenstone (Greenschist facies)

Greenschist

Greenschist (containing Chlorite, Epidote, and Actinolite)

Raw garnet-rich metamorphic rock

Likely garnet-bearing schist or garnetite; garnet-group silicates, commonly almandine (Fe₃Al₂Si₃O₁₂)

Chalcopyrite in Quartz matrix

Chalcopyrite (CuFeS2) with secondary Malachite (Cu2CO3(OH)2)

Pyrite

Iron Disulfide (FeS2)

Banded gneiss pebble

Gneiss, typically quartz–feldspar–mica assemblage

Foliated gneiss, possibly migmatitic gneiss

Gneiss; primarily quartz, feldspar, and mica (biotite/muscovite), with possible amphibole

Kyanite

Kyanite (Al2SiO5)

Gneiss

Gneiss

Polished ruby-in-fuchsite (tentative)

Fuchsite mica with corundum (ruby), commonly in quartzite or mica schist

Mica-rich Schist fragment

Mica Schist

Fuchsite

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

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Fuchsite

K(Al,Cr)2(AlSi3O10)(OH)2

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Garnet in Matrix

Almandine Garnet (Fe3Al2(SiO4)3)

Marble

Recrystallized Calcite (CaCO3)

Hypersthene

Hypersthene ((Mg,Fe)SiO₃)

Pyrite

Iron Sulfide (FeS2)

Apatite

Fluorapatite (Ca5(PO4)3F)

Kyanite

Kyanite (Al2SiO5)

Gneiss

Gneiss (Metamorphic high-grade)

Fuchsite

Chromium-rich Muscovite Mica

Schist with Biotite and Quartz

Biotite-Quartz Schist (Fe,Mg,Al silicate mix)

Greenstone with Epidote or Quartz veins

Metabasalt (Greenstone facies)

Quartz Vein in Greenstone

Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock

Mica Schist

Mica Schist (Quartz-Mica Metamorphic Rock)

Schist

Mica Schist

Epidote

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

Schist

Schist (various mineralogical compositions including mica, chlorite, talc, etc.)

Lazulite Quartzite

Quartzite with Lazulite (SiO2 with (Mg,Fe)Al2(PO4)2(OH)2)

Rough amber-colored quartz or calcite fragment

Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Pyrite with Quartz

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Almandine Garnet in Schist

Almandine, Fe3Al2(SiO4)3

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3