Metamorphic (Modified)

Jasper (Red and Yellow)

Silicon Dioxide (SiO2) with iron oxide impurities

Hematite

Iron(III) oxide (Fe2O3)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Blue Dumortierite Quartz

AlAl6BSi3O18 (Dumortierite) within SiO2 (Quartz)

Feldspar (Orthoclase/Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

Clear Quartz

Silicon Dioxide (SiO2)

Sodalite

Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)

Quartz (Milky and Bull Quartz)

Silicon Dioxide (SiO2)

Galena

Lead(II) sulfide (PbS)

Mixed Tumbled Stones Collection

Mixed Silicates and Carbonates (Quartz, Amorphous Silica, Carbonates)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Quartz (Iron-Stained or Milky Quartz)

Silicon Dioxide (SiO2)

Hematite

Iron(III) oxide (Fe2O3)

White Moonstone (Feldspar)

Potassium aluminum silicate (KAlSi3O8)

Golden Quartz (Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Garnet

Garnet Group (Silicate Minerals), formula varies e.g., Almandine Fe3Al2(SiO4)3

Emerald

Beryl (Be₃Al₂Si₆O₁₈), specifically the green variety colored by trace amounts of chromium or vanadium.

Sapphire (Corundum variety)

Sapphire (Al₂O₃)

Chalcopyrite

Chalcopyrite (CuFeS2)

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)

Jade (Nephrite or Jadeite)

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)

Schist

Mica Schist

Quartzite

Quartzite (primarily SiO2)

Quartz / Quartzite

Quartz (Silicon Dioxide, SiO2)

Garnet

Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)

Lapis Lazuli

Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite

Anthracite Coal

Anthracite (Carbon-based organic sedimentary rock exposed to metamorphic heat/pressure; Chemical composition is approximately 86%–98% Carbon)

Serpentinite

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

Nuummite

Nuummite (Ortho-amphibole rock, primarily Anthophyllite and Gedrite)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)

Quartzite with Iron Inclusions

Metamorphosed Sandstone (SiO2 dominated)

Quartzite

Quartzite (SiO2)

Red Quartzite

Quartzite (SiO2)

Marble

Metamorphosed Limestone (CaCO3)

River Quartzite Slik

Quartzite (SiO2)

Quartzite

Quartzite (SiO2)

Quartzite

Quartzite (primarily SiO2)