TheCosmicKid
Hero
But to be clear: adamant/diamond (same root) at bottom just means 'unbreakable thing'. It has been used variously for metals and gemstones over the ages. In Greek, what it is is kind of up in the air. In Latin, it's definitely a metal. It's not until I believe medieval French that diamond acquires the specific meaning it has today.While adamantine is used in D&D to refer to an extremely hard metal of meteoric origin, adamant is traditionally the hardest crystal and is basically synonymous with diamond.