Igneous, Sedimentary, Or Metamorphic (Mineral Based)

Citrine

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz

Silicon Dioxide (SiO2)

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8)

Labradorite

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Smoky Quartz

Smoky Quartz (SiO2 - Silicon Dioxide with trace impurities of aluminum)

Granite

Phaneritic Felsic Intrusive Igneous Rock

Sandstone Cobble

Clastic Sedimentary (Sandstone)

Sapphire (Raw/Rough)

Corundum (Al2O3)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Blue Celestite

Celestine (Strontium Sulfate, SrSO4)

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Granite

Phaneritic Felsic Igneous Rock

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Diorite

Diorite (an intrusive igneous rock)

Pink Feldspar

Orthoclase (KAlSi3O8) or Microcline

Smoky Quartz

Silicon Dioxide (SiO2)

Sandstone (likely Siltstone)

Arenite or Siltstone (high SiO2 content)

Sandstone (likely Greywacke or Siltstone variety)

Arenite / Siltstone (primarily SiO2)

Rhodonite

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

Greenschist (Greenstone)

Greenschist

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Pink Sapphire

Corundum (Al2O3) with Chromium/Iron/Titanium trace impurities

Blue Apatite

Apatite group (Ca5(PO4)3(F,Cl,OH))

Granite

Phaneritic plutonic rock (approx. 20-60% quartz, 35-90% feldspar)

Granite (Pink/Red Orthoclase variety)

Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)

Granite

Granite (consisting mainly of Quartz, Alkali Feldspar, and Plagioclase)

Granite

Granite (Phaneritic intrusive igneous rock) - Composition: SiO2, Al2O3, K2O, Na2O

Lapis Lazuli

Lapis Lazuli (Mineral composition: Lazurite (Na,Ca)8(AlSiO4)6(SO4,S,Cl,OH)2, Calcite, and Pyrite)

Shale

Shale (comprised mostly of clay minerals and quartz)

Sandstone (Quartzose)

Arenite (primarily SiO2)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Yellow Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Milky Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

Red Garnet

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

Citrine

Silicon Dioxide (SiO2)

Banded Agate

Cryptocrystalline Silicon Dioxide (SiO2)

Yellow Quartz (Citrine appearance)

Silicon Dioxide (SiO2)