You can probably find your answer on google. I've never heard of those types of agate before, though from my personal experience with agate, it helps with anxiety and grounding.
'Sky blue'? Are you referring to blue lace agate? You can find information on the properties of that stone here: http://www.crystalvaults.com/crystal-encyclopedia/blue-lace-agate
I couldn't find much information on 'dragon vein' agate, but this site may have what you are looking for: http://gypsymoons.com/gemstones/dragonsvein.html