Metamorphic And Mineral

Red garnet crystal cluster

Most likely almandine garnet, Fe₃Al₂(SiO₄)₃; exact species cannot be confirmed from the image alone.

Biotite Schist

Biotite Schist

Tumbled rhodonite

Rhodonite, manganese inosilicate (MnSiO₃), commonly mixed with quartz and manganese oxides

Feldspar

Feldspar (Orthoclase/Microcline)

Pink Quartz

Silicon Dioxide (SiO2)

Pink Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Clear Quartz

Silicon Dioxide (SiO2)

Yellow Beryl

Beryl (Be3Al2(SiO3)6)

Rose Quartz

Silicon Dioxide (SiO2)

Garnet-bearing gneiss

Biotite–feldspar gneiss with almandine garnet; quartz likely present

Blue Apatite

Fluoroapatite (Ca5(PO4)3F)

Strawberry Quartz (Quartz with Hematite inclusions)

Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)

Chalcopyrite (Peacock Ore)

Copper Iron Sulfide (CuFeS2)

Black tourmaline (schorl), possibly rough

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

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Banded gneiss pebble

Gneiss, typically quartz–feldspar–mica; exact mineral composition requires testing

Quartz Vein in Pelite (Metamorphic Rock)

Hydrothermal Quartz Veining in Metasedimentary Rock (SiO2)

Kfeldspar (Potassium Feldspar)

KAlSi3O8

Epidote

Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Bornite

Bornite (Cu5FeS4)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Rhodonite

Rhodonite (MnSiO3)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Orthoclase Feldspar

Orthoclase (KAlSi3O8)

Bornite

Bornite (Cu5FeS4)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Foliated metamorphic rock, likely biotite gneiss or schist

Biotite-rich gneiss/schist; chiefly quartz, feldspar, and biotite mica

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Banded gneiss pebble

Gneiss, commonly quartz–feldspar–mica gneiss

Likely schist, possibly serpentinite

Mica schist; potential chlorite–serpentine-rich metamorphic rock

Hematite

Iron Oxide (Fe2O3)

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

Quartz with Iron Oxide Inclusions

Silicon dioxide with limonite/hematite (SiO2)

K-Feldspar (Potassium Feldspar)

Potassium Feldspar (KAlSi3O8)

Citrine

SiO2 (Silicon Dioxide)

Pyrite in Matrix

Iron Sulfide (FeS2) embedded in host rock

Blue Apatite

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

Quartz

SiO2 (Silicon Dioxide)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Quartz with Matrix

Silicon Dioxide (SiO2)

Tiger's Eye

Silicon dioxide (SiO2) with fibrous inclusions of crocidolite