Enchanted bolts

Enchanted bolts are gem-tipped metal Bolts that have been enchanted with one of the enchantment spells from the Normal spellbook. These bolts have a 15% chance to trigger an additional effect on the target.

Bolts	Required crossbows	Obtained from	Effect
Sapphire bolts (e)	Mithril crossbows and up	Enchant Sapphire bolts with Lvl-1 Enchant, requires 7 Magic	Reduces enemy prayer points by 10% of your current prayer points. You also steal half of the reduced enemy prayer points and add them to your prayer points. When fighting monsters this effect restores 2 prayer points.
Emerald bolts (e)	Mithril crossbows and up	Enchant Emerald bolts with Lvl-2 Enchant, requires 27 Magic	Inflicts 3 poison damage that can stack up to 15.
Ruby bolts (e)	Adamant crossbows and up	Enchant Ruby bolts with Lvl-3 Enchant, requires 49 Magic	Additional damage is 20% of your target's current health up to 30. Damages you for 5% of your max health. Does not trigger if you are under 10% of your max health.
Diamond bolts (e)	Adamant crossbows and up	Enchant Diamond bolts with Lvl-4 Enchant, requires 57 Magic	Completely ignores the enemy's defence and guarantees a hit. The damage is also increased by 15%.
Dragon bolts (e)	Rune crossbows and up	Enchant Dragon bolts with Lvl-5 Enchant, requires 68 Magic	Additional damage between 10 and 25, does not affect dragons, players with dragonfire protection and fire-based monsters
Onyx bolts (e)	Rune crossbows and up	Enchant Onyx bolts with Lvl-6 Enchant, requires 87 Magic	Additional damage between 10 and 20, heals you for 20% of your total hit.