Second coin in the 4 Layer series. 20 Dollar Ultra High Relief St. The pure silver coin is made with "4-Layer" minting technique that achives a deep of up to 5 mm - creating a three dimensional effect. Weight (g): 100 Quality: Antique Finish. Coin will be delivered in luxurious coin box with original Certificate of Aithenticity.The item "$20 Dollar 4 Layer High Relief St. Peter Basilica Cook Islands 100 g Silver 2016" is in sale since Monday, February 18, 2019. This item is in the category "Coins & Paper Money\Coins\ World\Australia & Oceania\Australia\Commemorative". The seller is "muenzdachs" and is located in Mainz. This item can be shipped worldwide.