Metamorphic (Pseudo Igneous)

Citrine

Silicon Dioxide (SiO2)

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Copper Ore (likely Chalcopyrite in Matrix)

Chalcopyrite (CuFeS2)

Pink Tumbled Quartz (Dyed)

Silicon Dioxide (SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Vein on Matrix

Silicon Dioxide (SiO2)

Hematite (Iron Ore)

Hematite (Fe2O3)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Quartz (Clear/White)

Silicon Dioxide (SiO2)

Sunstone

Oligoclase or Andesine (Labradorite) Feldspar (Na,Ca)(Si,Al)4O8

Clear Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Pink Sapphire

Corundum (Al2O3 with Chromium/Titanium/Iron traces)

General Gravel (River Rock/River Stones)

Mixed Lithic Sediments (Conglomerate Clasts)

Amazonite

Potassium Feldspar (KAlSi3O8)

Moonstone

Adularia (Potassium Aluminum Silicate, KAlSi3O8)

Blue Calcite

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Potassium Feldspar (Orthoclase)

KAlSi3O8 (Potassium Aluminum Silicate)

Feldspar

Potassium Feldspar (KAlSi3O8)

Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Yellowish)

Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Citrine

Citrine (Silicon Dioxide, SiO2)

Amethyst (Quartz variety)

Amethyst [Silicon Dioxide (SiO2)]

Black Tourmaline (Schorl)

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Pyrite

Iron Sulfide (FeS2)

Hematite (Tumbled)

Iron(III) oxide (Fe2O3)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Milky or Cloudy Quartz)

Silicon Dioxide (SiO2)

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Bull Quartz (White Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (SiO2)

Banded Chalcedony (Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Moonstone

Orthoclase Feldspar (KAlSi3O8) or Albite mixtures