Buy OSRS Onyx necklace
The onyx necklace is a members-only item in Old School RuneScape. It is made by using a gold bar, an onyx, and a necklace mould on a furnace. Making it needs level 82 Crafting and gives 120 Crafting experience. The necklace is tradeable, equipable, and noteable, and it weighs almost nothing at 0.01 kg. On its own, it has no combat bonuses or penalties.
The main reason players want this necklace is to enchant it. With level 87 Magic, the Lvl-6 Enchant spell turns it into a berserker necklace. The spell uses one cosmic rune, 20 earth runes, and 20 fire runes.
The berserker necklace is a strong pick for players who use obsidian melee weapons. It boosts damage by 20% when wielding the Toktz-xil-ak, Tzhaar-ket-om, Tzhaar-ket-em, or Toktz-xil-ek. This damage boost stacks with the full Obsidian armour set, the slayer helmet, and Void Knight equipment. The trade-off is lower melee accuracy and lower defence against all combat styles.
Buying an onyx necklace saves the time and cost of crafting it yourself. It is a simple path to one of the best damage-boosting necklaces for obsidian weapon builds.