Metamorphic Or Igneous With Mineral Inclusion

Auriferous Quartz (Gold-bearing Quartz)

Silicon Dioxide (SiO2) with trace Gold (Au) and Iron Oxides

Milky Quartz

Silicon Dioxide (SiO2)

Magnetite with Quartz

Magnetite (Fe3O4)

Tumbled green aventurine (probable), with blue-gray tumbled stones

Aventurine quartz, SiO₂ with fuchsite or other mica inclusions; blue stones may be sodalite or dyed quartz

Green Aventurine in Host Rock

Quartz (SiO2) with Fuchsite inclusions

Quartz crystal fragment (likely milky/inclusion-rich quartz)

Quartz, silicon dioxide (SiO₂)

Milky Quartz

Silicon Dioxide (SiO2)

Milky quartz (likely quartz-rich rock)

Quartz, silicon dioxide (SiO₂)

Magnetite (Loadstone candidate)

Iron(II,III) oxide (Fe3O4)

Quartz with inclusions

SiO2

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Quartz (Milky Quartz/Citrine Type)

Silicon Dioxide (SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Likely milky quartz

Quartz (silicon dioxide, SiO₂)

Gold-Bearing Quartz Ore

Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Hematite)

Petrified Wood

Silicified wood (Quartz/Chalcedony - SiO2)

Garnet in Schist (Mica Schist with Garnet Inclusion)

Garnetiferous Mica Schist (X3Al2(SiO4)3)

Orange Quartzite

Quartzite (SiO2 with iron oxide impurities)

Blue Quartzite

Quartzite with inclusions (often Dumortierite or Magnesio-riebeckite)

Ruby

Corundum (Aluminum Oxide, Al2O3)

Aventurine

Silicon Dioxide (SiO2) with inclusions

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]

Lapis Lazuli

Lapis Lazuli (Rock composed mainly of lazurite, calcite, and pyrite)

Milky quartz fragment

Quartz, silicon dioxide (SiO₂)

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Rhodonite, Gray Moonstone, and White Feldspar Mix

Multiple: MnSiO3 (Rhodonite), (K,Na)AlSi3O8 (Feldspar/Moonstone)

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Rounded, porphyritic volcanic pebble (likely andesite)

Porphyritic andesite; exact identification requires examination or testing

Emerald

Beryl (Be3Al2(SiO3)6)

Staurolite (Cross Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Tumbled/polished quartz crystal point

Quartz — silicon dioxide (SiO₂), likely a pale smoky or milky variety

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz Vein / Quartz Matrix

Silicon Dioxide (SiO2)

Sunstone

Oligoclase (Feldspar variety), (Na,Ca)(Si,Al)4O8

Milky Quartz

Silicon Dioxide (SiO2)

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Quartzite Pebble (with possible inclusion)

Metamorphosed Quartz Sandstone (SiO2 with impurities)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Milky Quartz

Silicon Dioxide (SiO2)