Apparently Mya, besides being from the Greek Maia, is also Burmese* for emerald.
http://www.babynamenetwork.com/baby_names/origins/Burmese_baby_names.cfmhttp://baby-names.adoption.com/search/Mya.htmlhttp://asiarecipe.com/burname.html
* For all those who don't know, Burma is now Myanmar.
May I suggest you admit this name to Mike C so he can add it.