Some bee keepers offer some expensive honey that they have seeded with special crystals to make a pre-crystalized honey. It's quite good.

My grandmother preferred the crystalized, or sugared, honey. I do to. It stays on the cracker better, not running off the sides.

As for melting the crystals, you can put the honey in the car on a sunny day. That always seems to work just fine with expensive pre-crystalized honey.

I also put the last of the honey jar on top of the pilot light on the stove top. It works just fine, though it takes a while.