This instance is from Wikipedia and should be reused less than a CC BY-SA license. They are often sculpted into several shapes in the course of this method, in some cases leading to deep thumb-print like indentations on their own surfaces identified as regmaglypts. From Wikipedia References in periodicals archive https://sculptedmdlakewood29494.snack-blog.com/36435321/how-much-you-need-to-expect-you-ll-pay-for-a-good-sculpted-md-lakewood