For those of you like me who have over 100+ friends and don't want to delete them.
I finagled my achievement while I used a second account to transfer over Gems to my main account. At one point my gems were not getting sent to main account so I hard reset my xbox by holding the power button on console until it shuts itself off.
I tried transferring more gems with secondary account and having my main account signed on as well while doing this the achievement popped for my main account.
Hope this helps...