first off his body becomes diamond? doesn't appear to it more looks like his body becomes encased in diamond he was able to block
mihawks attack (Haki Slash) taken head on, but Aokiji freezes him and he Loses an Arm
http://www.google.com.au/imgres?img...act=rc&uact=3&dur=1053&page=1&start=0&ndsp=15
If his body was diamond such attacks wouldn't work
1. To cut Dazz Zoro had to be able to cut steel
2. Enel cant shock luffy
3. Diamonds cant be frozen.........
So can Diamonds Freeze?
Not that I'm aware of! They are the hardest natural substance after all. They were made over a million years ago. Diamonds have survived every type of Climate Change and Catastrophe. Diamonds are even located in some of the Coldest Places on Earth: the Frozen Rock of the Arctic Tundra. So will a little Cold and Frost bother them? I'm thinking not!
If Diamonds did Freeze in ice, it would give new meaning to "On the Rocks!" Hmmmm....
But hold on... Let's stop and think about this for a second...
If we back up and change the way that we're thinking, you'll see that
YES, Diamonds Can Freeze!
What?
It's true. Diamonds have a melting point of 3550c (6422F). This means that if you melted a Diamond under these Extremely Hot Conditions (Like the Earth did when it created them), then let them cool off, then Yes... Technically these Diamonds would "Freeze" up again as they cooled.
They would turn back into a Solid Black Chunk of Pure Carbon! How pretty! Would you like to wear one of those instead of your Beautiful, little Diamond? Doubtful!
The bottom line:
No! Diamonds Don't Freeze!
Diamonds are already "Frozen" in time!