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 Quality Natural Crystal Carved Skull (You will get the exact carving that you select). Various Crystal Material Types Available to select from, use the selector to see the photo and price of your specific material choice. Each skull measures approx. 2" Long x 1.5" High x 1.25" Wide. Sizes will vary slightly, pick the skull you like the most.