There is a Amber mine NW of the Guild town Ker'tis on Trandalar North of the Rift. Some corridors are done and theres some Amber nodes available right now. There is still a 3way, Bend and a Unique Lunus Chamber not available anywhere else. All of the unbuilt structures require Tier 1 stuff. The chamber requires quite a bit to finish. The mine is located at 24750/39203. Not sure if anything will be in the Unique chamber or not. Doesnt appear to have a crystalshaping machine in the mine.