Black is the most common color of natural lava beads, but they can also be found in gray and brown. These beads are made from basalt, the rock that forms when lava cools and hardens. Each bead is full of tiny little bubbles in the rock, and you'll see them on the surface of the bead as well. The bubbles make the bead much lighter than you would expect a stone to be. This makes them perfect for jewelry! Lava stone is thought to be calming and has been used in malas.