Talk:Bonetooth Necklace/@comment-92.158.53.119-20120818124748/@comment-92.14.233.183-20120819103851

I think he meant the individual bonuses.

The bonuses of the Bonetooth Necklace all stack with themselves: you can have +25 movement speed, 5% cooldown reduction and 10% armor pen all at the same time. You do not lose bonuses when you unlock the next bonus.

Multiple Bonetooth Necklaces only benefit from the attack damage, as the trophy effect is unique. However, if the Bonetooth Necklace is anything like Mejai's, Sword of the Occult, etc, than you will gain twice the stacks per kill (as you gain 1 stack per item). With Mejai's the rate that you lose stacks is unaffected by having two (you don't lose a third twice); so having two Bonetooth Necklaces would have you snowball quicker, but won't grant bonus effects beyond double the AD.