Ancient Tibetan glass stone is formed from erupted lava of volcano in the form of magma. Energy of stones usually very large so Tibetans have used it since ancient times make jewelry and Trang Beads.

Ancient glass stone colors like black, brown, green, lam, the ..., double when there is a white mottled inside, but the most common feature is black.

In addition, stone also has a positive effect on the nervous system to help reduce stress, bring positive energy and positive effect on some of the chakras of the body.