This instance is from Wikipedia and may be reused beneath a CC BY-SA license. They are often sculpted into a variety of shapes for the duration of this process, at times resulting in deep thumb-print like indentations on their surfaces named regmaglypts. From Wikipedia This example is from Wikipedia and https://sculpted-md-lakewood22086.total-blog.com/not-known-factual-statements-about-sculpted-md-lakewood-61688826