EXTREMELY RARE! Nuummite (Sorcerer's stone) gem with tourmaline in Quartz pendant, hand-made in Sterling SilverAt just over 3 billion years old, Nuummite, also known as Sorcerer's stone, is one of the oldest rocks on Earth. I was recently able to acquire and cut some of this exceedingly rare material. This large piece is accented with black onyx above and a gorgeous, tourmaline rich quartz drop below in this unique, articulated Sterling Silver pendant