Igneous Or Metamorphic

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Quartz-rich rock, possibly milky quartz or quartzite fragment

Quartz (SiO₂), potentially quartzite if metamorphic

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Mica / Muscovite or Biotite

Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)

Muscovite Mica

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

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Epidote (likely Unakite component or Epidosite)

Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))

Muscovite Mica

KAl2(AlSi3O10)(F,OH)2

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Muscovite Mica

Muscovite - KAl2(AlSi3O10)(OH)2

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss (High-grade metamorphic rock)

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Gneiss (River Cobble)

Gneiss

K2 Stone

Azurite in Granite

Greenstone

Metabasalt / Chlorite Schist

Greenstone / Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Actinolitic Schist

Serpentine

Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Fe)2O5(OH)4)

Quartzite Pebble

Quartzite (SiO2)

Gneiss

Banded Metamorphic Rock (Gneiss)

Amphibolite / Biotite Schist

Amphibolite (rich in Hornblende and Plagioclase feldspar)

Epidote

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

Green Schist

Greenschist (Chlorite Schist)

Greenstone (Epidosite)

Epidosite (Metamorphosed Basalt/Diabase)

Pink Garnet (likely Almandine or Rhodolite)

Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)

Gneiss

Gneiss

Gneiss

Metamorphic Gneiss (High-grade regional metamorphism)

Banded Gneiss

Gneiss (Metamorphic Rock)

Green Schist

Greenschist

Garnet (Almandine-Pyrope)

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

Pyrite

Pyrite (Iron Disulfide), FeS2

Mixed Gemstone Bracelet

Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)

Iridescent schist or phyllite

Micaceous quartz-rich schist/phyllite, likely containing muscovite or chlorite

Greenschist

Greenschist (Chlorite Schist)

Green Schist

Greenschist (containing Chlorite, Actinolite, and Epidote)

Green Schist

Greenschist (composed of chlorite, epidote, and actinolite)

Muscovite Mica (in Quartz matrix)

Potassium aluminum silicate hydroxide fluoride (KAl2(AlSi3O10)(F,OH)2)

Garnet and Quartz

Pyrope or Almandine (Red Garnets) and Quartz (Center Stone)

Almandine Garnet

Fe3Al2(SiO4)3

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Biotite Schist

Biotite Schist (Metamorphic Rock featuring K(Mg,Fe)3AlSi3O10(OH)2)

Greenschist

Greenschist facies rock (containing chlorite, actinolite, and epidote)