Labradorite is a variety of plagioclase feldspar, an abundant group of framework silicates that form a significant portion of the Earth's crust, characterized by its composition intermediate between albite (NaAlSi₃O₈) and anorthite (CaAl₂Si₂O₈), specifically with an anorthite content of 50 to 70 mole percent.[1] Its chemical formula is expressed as (Ca,Na)[Al(Al,Si)Si₂O₈], reflecting the solid solution series where calcium and sodium substitute in varying ratios.[2] The mineral exhibits a triclinic crystal system and is renowned for its labradorescence, a spectacular iridescent play-of-color displaying vivid blues, greens, and sometimes golds or oranges, caused by the