Tektie beads are also known as indochinite beads and Libyan desert glass. Still poorly understood, tektites have no crystal structure, and are therefore similar to obsidian, but are not associated with volcanic processes. Usually opaque, tektites are essentially silica glass containing minuscule particles of meteoric material. The leading theory is that this semiprecious gemstone consists of fused glass that formed during the impact of meteors with rock on the Earth's surface. Tektites vary in color from pale golden-yellow to black, depending on the chemicals and minerals present in the terrestrial material. Tools made of tektite have been found that date back to 6000-4000 B.C. Metaphysically, tektite beads are said to help increase wisdom and knowledge. They are thought capable of allowing extraterrestrial communication, astral travel and lucid dreaming. Mystics say tektites strengthen one's energy field.