Mexican Sardonyx (Sometimes referred to as Mexican Sardonyx Crazy Lace) is a rare form of Crazy Lace found only in one location in a remote part of Chihuahua Mexico. Normal Crazy Lace can be found all throughout the world which is why it is less expensive. 1 High Detail High Quality Natural Crystal Carved Mexican Sardonyx Skull. This Skull measures approx. 4.5" Long x 3.6" High x 2.88" Wide. Weighs 2.13lbs (.966Kg).