Mixed (Sedimentary, Igneous, And Metamorphic)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss

Gneiss

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)

Gneiss (complex silicate composition)

Garnet-Bearing Gneiss

Almandine-Garnet Gneiss

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Chakra Tumbled Stone Set

Various (including Amethyst [SiO2], Sodalite [Na8(Al6Si6O24)Cl2], Green Aventurine [SiO2], Red Jasper [SiO2], etc.)

Smoky Quartz

Silicon Dioxide (SiO2)

Black Tourmaline (Schorl)

Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3(OH)4)

Quartz (likely Jasper or Chert variety)

Quartz (SiO₂)

Yellow Quartz (Citrine/Lemon Quartz)

Silicon Dioxide (SiO2)

Green Tourmaline (Verdelite)

Tourmaline Group; often Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) or Dravite (NaMg3Al6(BO3)3Si6O18(OH)4)

Gneiss (with iron staining)

Gneiss

Gneiss

Gneiss (High-grade Regional Metamorphism)

Gneiss (likely Granitic Gneiss)

Gneiss

Gneiss (Pebble)

Gneiss

Gneiss (with Quartzite and Mica)

Gneiss

Gneiss

High-grade regional metamorphic rock (Foliated)

Gneiss

Gneiss

Gneiss

Gneiss

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Quartz Vein in Host Rock

Quartz (SiO2) in Mafic or Sedimentary Matrix

Pyrite

Iron Sulfide (FeS2)

Biotite (Black Mica)

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

Pyrite

Iron Sulfide (FeS2)

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Smoky Crystal fragment)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Quartz (Silicon Dioxide, SiO2)

Pyrite

Iron Disulfide (FeS2)

Quartz (specifically Milky/White Quartz)

Silicon Dioxide (SiO2)

Feldspar

KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8

Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Crystalline Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)