hardstoneEtymologyVariant of Harston, with intrusive -d-.hardstone means A surname. Lexicurio rates it Sui generis — a strength score of 90 out of 100.nameA surname.nounPrecious stone or semi-precious stone used to make intaglio, mosaics etc.“I was curious what it would take, so doing some calculations based on instamining hardstone, and comparing hardness, I've determined you need 45k mining speed to instamine mithril. 11.25k with mining speed boost. Is this achievable? Well, looking at the ways of increasing speed on the wiki: […]”