This example is from Wikipedia and will be reused underneath a CC BY-SA license. They can be sculpted into numerous designs all through this process, from time to time resulting in deep thumb-print like indentations on their surfaces identified as regmaglypts. From Wikipedia References in periodicals archive ? Sculpted through https://sculpted-md-lakewood81357.blogkoo.com/the-basic-principles-of-sculpted-md-lakewood-55746123