Caisson Ceiling of the Temple of Heaven. 999 silver coin, $20 cook islands, 100g

Caisson Ceiling of the Temple of Heaven. 999 silver coin, $20 cook islands, 100gAn extremely special release, this sublime coin was created using a new 4-layer minting process allowing an unprecedented level of 3D depth to the design. As far as I can tell, this is the first coin release to use this special process. There are a couple of others that have been made in subsequent years showing other architectural wonders. Only 999 of these Temple of Heaven coins were ever minted and they are almost impossible to get hold of. The exquisite design, historic minting process, low mintage