Diamond bolts (e)

Enchanted diamond bolts are adamant bolts tipped with enchanted diamond. Diamond bolts can be enchanted by using the spell Enchant Crossbow Bolt (Diamond) by a player with 57 Magic. The spell enchants 10 diamond bolts per cast and uses 2 Law runes, 1 Cosmic rune, and 10 Earth runes.

Enchanted diamond bolts have an Armour piercing enchantment. On hits when the enchantment activates, the bolts will negate a sizable portion of their target's defence bonuses against Ranged. This also raises the player's max hit, but whether or not it increases the damage dealt is unknown. A crystalline, tinkling sound can be heard when this activates.

Trivia

 * These bolts are superior for boss hunting due to the bolts' special attack that can negate part of the opponent's defence, making hitting hard not a problem.