Clear Crystal Quartz Skull, Hand Carved Human Skull on Diamantina QuartzClear Crystal Quartz Skull from Diamantina, Brazil Emerging from a truly spectacular rough Diamantina Quartz specimen, this human skull has been sculpted into a work of art by my friend Romeu, acclaimed as one of Brazil's premier skull sculptors. Raised to an exceptional level, this skull's natural features make it a true gem. The most notable feature is the high quality of the Clear Quartzan AA grade that reveals stunning and large internal rainbows.