This instance is from Wikipedia and may be reused below a CC BY-SA license. They can be sculpted into various shapes for the duration of this process, from time to time leading to deep thumb-print like indentations on their surfaces called regmaglypts. From Wikipedia References in periodicals archive ? Sculpted https://sculptedmdlakewood58136.webbuzzfeed.com/36859721/the-sculpted-md-lakewood-diaries