Gorgeous Real Crystal Skull with Huge Rainbows, Diamantina QuartzAAA Crystal Clear Crystal Skull, from Diamantina With superb transparency and huge rainbows formed in its interior, this human skull was hand sculpted from a single piece of Diamantina quartz crystal to become this artwork. The Diamantina quartz itself is gorgeous, AAA grade crystal quartz, so clean that makes it very difficult to photograph or record. Huge rainbows can be seen all over the skull, a quality that only can be seen on crystals from