Spain Aventurine is a form of quartzite, characterized by its translucency and glistening surface. The name Aventurine comes from the Italian a ventura which means “by chance”. It is a popular lucky charm for gamblers this elegant natural stone ring is handcrafted by skilled artisans in Spain. The base metal ring is fitted to the stone and then finished with 18k gold. Adjustable bypass design allows for adjustability.