This example is from Wikipedia and will be reused underneath a CC BY-SA license. They are often sculpted into several designs through this process, often leading to deep thumb-print like indentations on their own surfaces termed regmaglypts. From Wikipedia References in periodicals archive ? Sculpted by the internationally-acclaimed JOOheng Tan https://andersonmdpbk.myparisblog.com/37015256/everything-about-sculpted-md-lakewood