Mineral (Metamorphic Pseudomorph)

Milky Quartz with Chlorite / Mica inclusions

Silicon Dioxide (SiO2) with phyllosilicate inclusions

Quartz-veined Granite or Gneiss Pebble

Silicate-rich metamorphic rock fragment

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Schist (Micaceous Schist)

Schist (containing mainly Muscovite and Quartz)

Tumbled greenstone/chlorite-rich pebble

Likely chlorite-rich greenschist or altered basalt; exact identification requires testing

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Banded gneiss pebble

Gneiss, chiefly quartz–feldspar–mica with dark biotite/amphibole bands

Quartz

Silicon Dioxide (SiO2)

Granitic Pegmatite (Muscovite and Quartz)

Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)

Black Marble with Quartz Veining

Metamorphosed Limestone (Recrystallized CaCO3)

Banded Quartzite

Quartzite (principally SiO2)

Quartzite with Differential Weathering

Quartzite (SiO2)

Quartzite (River Rose Quartzite)

Quartzite (primarily SiO2)

Titanium Coated Kyanite (Aura Kyanite)

Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating

Lapis Lazuli

Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Pyrite, and Calcite)

Rutilated Quartz (with Garnet pendant)

Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions

Mica Schist with Pyrite

Mica Schist (FeS2 containing)

Gneiss

Gneiss

Quartz (Milky/Clear Variety)

Silicon Dioxide (SiO2)

Quartz (Milky to Clear)

Silicon Dioxide (SiO2)

Quartz (possibly Citrine or Smoky Quartz variety)

Silicon Dioxide (SiO2)

Aventurine (Tan/Cream colored)

Quartz (SiO2) with mineral inclusions

Banded Rock (likely Quartz-rich)

Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals

Biotite Mica

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky Variety)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Gneiss

Feldspathic biotite gneiss; a high-grade metamorphic rock composed mainly of quartz, feldspar, and mica

Greenish Feldspathic Rock / Epidote Granite (Unakite-type or Epidote-bearing rock)

Epidotized Metamorphic/Igneous Rock

Slate

Slate (Foliated Metamorphic Rock)

Quartz Crystal Fragment

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Gneiss

Gneiss (High-grade metamorphic rock)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Serpentinite

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Orthoclase Feldspar

KAlSi3O8 (Potassium aluminum silicate)

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

Milky Quartz

Silicon Dioxide (SiO2)