Adamantine was the name of five jet-black alloys of Adamant. Usually black in color, adamantine had a green sheen when viewed by candlelight or a purple-white sheen when viewed by magical light. Adamantine was the most durable adamant alloy, and one of the hardest metals known to smiths. Weapons made from it were useful for damaging the weapons and armor of opponents clad in just about any other material, while a set of adamantine armor absorbed a significant amount of energy from most physical blows.
Adamantine melted at an estimated 3410ºC, requiring exceptionally hot magical fires to fotge, and boiled at 5900ºC. The alloy was largely unaffected by seawater; in fact, Dwarven smiths often brined it to help it shine. The alloy conducted magic rather well, making it excel at compatibility with most Spell enchantments.