2013 Niue Island Mysteries of Wawel 2 Oz Antique High Relief Silver ProofMint capsule, Wood Presentation Box, Certificate of Authenticity. The seller is grcoingallery and is located in Attleboro, Massachusetts. 2020 Niue Love Tree Heart Wedding Silver Colored Coin Swarovski Crystal GemstoneThe coin has a wonderful coloration, has a proof quality, a beautiful heart shaped insert of Swarovski crystal in blue.