Genuine Citrine can vary from pale yellow to deep reddish-brown. It's transparent to translucent, with a vitreous luster. Unlike some other gemstones, Citrine does not display pleochroism — showing different colors when viewed from different angles. The stone also doesn't have any cleavage and breaks with a conchoidal fracture. Remember, it's always best to purchase from reputable dealers or have the gemstone certified by a professional gemologist.