Aura Quartz tumbles are a visually stunning modern crystal — natural Clear Quartz is bonded with precious metals (gold, titanium, platinum, or a combination) in a vacuum chamber, creating the iridescent, rainbow-like metallic coating that gives Aura Quartz its distinctive shimmer. The result is something genuinely otherworldly — a stone that shifts through blues, purples, golds, and greens with every movement. Aura Quartz retains all of Quartz's natural amplifying and clarifying energy, with the added energy of the metal(s) used in the treatment. A beautiful collector's piece and a wonderful energy tool for those drawn to high-vibrational crystals.