2. A family of crystals with a borosilicate base.
3. Tourmaline is the birthstone for October.
The name Tourmaline means “all colors”. In the past 10 years interest in tourmaline has spiked tremendously! Many special pockets are named and pedigreed, and the sheer variety in tourmaline will always keep it popular. Look for and get to know the various color zoning, usually in the form of banding and core-coloring. Tourmaline has somewhat of a cult following.