I have perchased 2 of these for my 2 Ivy brecers. I am a wood elf and I bought my first in Kelethin. It cost 196pp at the jewelry shop. The second I bought in Freeport and it cost 206pp. Faction makes a big difference.
I'm an Iksar SK. I had a friend purchase two of these for me. He found them in FV on a vendor. They cost 106pp each. Good luck] Zorizhiss Tepes 26 seasons Shadow Knight Tarew Marr
Elder Granitebacks in Stonebrunt Mountains drop these occasionally. For Rangers looking for bracers, you can start fear kiting animals here from 30 on up to 40 or so.
I know first hand that high level dungeons will sometimes rarely drop these gems. the only one i have seen in person is Old Sebilis. any of the creatures in the zone can drop the fire emeralds. but i wouldnt suggest going here till at least 45+, most people will want to wait till 49th. so if your looking for an easy place to get them for free, there isnt one. its not even that easy to get here, buecause its just randomly droped off mobs