Adamant bolts can be made at level 73 Smithing from an Adamant bar granting 62.5 experience, producing 10 adamant bolts (unf) per bar. Attaching one feather per bolt with level 61 Fletching, at 7 exp per bolt or 70 experience per set of 10 bolts produces the finished product. Then, bolt tips (made by using a chisel on a cut gem) can be attached to them and subsequently enchanted for different effects. The two gems that can be attached are ruby and diamond, resulting in ruby bolts and diamond bolts respectively.
They require a Ranged level of 40 to use and may be fired by any crossbow.
Players often use broad-tipped bolts for training and general purposes instead because their damage is higher than adamant bolts, and are cheaper to use, however, broad-tipped bolts are only able to be used with a rune, Armadyl or chaotic crossbow, and require 55 Slayer.