The Trecena Of Truth & Healing Etznab, or Tijax in K’iche’ Maya, is the day sign of Obsidian, an extremely sharp natural glass formed by volcanic activity that among the Maya is most prized by diviners and warriors. Like obsidian that embodies the forces of nature that forged it, Etznab symbolizes the power of thunder and lightning. Like obsidian, Etznab is sharp yet fragile, difficult to polish and manipulate, and cuts to the core of things with all of the force of integrity