How rare are Defense and Additional Damage Brillant Diamonds?

[Cassey]

I've been making diamonds for awhile (a couple of dozen in any case) and I've never see a defense or additional damage diamond.  Normally I either create a +Attack or a +Block gem.

 

The Gem Achievement however requires Defense and Additional Damage.  I have confirmed that +Attack is not Additional Damage and +Block is not Defense.

 

Have I just been unlucky?

[Eiria]

considering the onlydiamond gem that sells at any level are the +attack power diamonds, i don't think your inability to pull the crap ones is actually considered unlucky at all I, on the other hand, have never pulled the attack power gems i need to use at all, and am forever getting evasion instead.

[Cassey]

And of course, minutes after posting, I popped a Defense one.  Alas, those crap ones are needed for an Achievement, and those are important for end-game.