The term can be employed synonymously with "volcanic ash." It can be mined from volcanic ash deposits, or it may be made by crushing rock pumice. Inverse pityriasis rosea typically triggers a rash over the armpits or groin. It can be an atypical sort of pityriasis rosea. Find out more https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/