Metamorphic And Mineral

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Pyromorphite on Epidote

Pyromorphite [Pb5(PO4)3Cl] and Epidote [Ca2(Al2,Fe3+)(SiO4)3(OH)]

Milky Quartz

Silicon Dioxide (SiO2)

Biotite Mica

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

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Schist

Mica Schist

Rhodonite

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

Hypersthene

Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)

Sodalite

Na8(Al6Si6O24)Cl2

Pyrite

Iron Pyrite (FeS2)

Gneiss (Cobble)

Gneiss

Arsenopyrite

Arsenopyrite (FeAsS)

Mixed Gemstone Collection

SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)

Quartz (Milk Quartz / Massive Quartz)

Silicon Dioxide (SiO2)

Yellow Aventurine

Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)

Gneiss

Foliated Metamorphic Rock (Gneiss)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Schist

Mica Schist

Amazonite

Potassium Aluminum Silicate (KAlSi3O8)

Granite Gneiss

Gneiss (high-grade metamorphic rock)

Amphibolite (specifically Hornblende Schist/Gneiss)

Amphibole-rich Metamorphic Rock

Amazonite

K(AlSi3O8)

Kyanite in Quartz

Al2SiO5 in SiO2

River Cobble (Gneiss/Migmatite)

Gneissic Metamorphic Rock (composed mainly of Quartz, Feldspar, and Biotite)

Mica Schist

Schist (primarily Muscovite and Biotite mica)

Lapis Lazuli

Na6Ca2(Al6Si6O24)(S,SO4,Cl)1-2 (primarily containing Lazurite with inclusions of Calcite and Pyrite)

Milky Quartz with Mica inclusions

Quartz (Silicon Dioxide, SiO2)

Marble

Recrystallized Calcite (CaCO3) Rock

Quartz

Silicon Dioxide (SiO2)

Gneiss (specifically Granitic Gneiss)

Gneissic Metamorphic Rock

Arsenopyrite in Quartz/Host Rock

Arsenopyrite (FeAsS)

Moonstone (Tumbled)

Orthoclase Feldspar (KAlSi3O8) with inclusions of Albite

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

Garnet Schist

Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)

Labradorite (a variety of Feldspar)

Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Mica Schist

Mica Schist (primarily Muscovite or Biotite sheet silicates)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Crystal Fragment)

Quartz / Silicon Dioxide (SiO2)