2 Dollars - Elizabeth II Millennium Star

Niue has long operated as a licensing platform for novelty collector issues, with the New Zealand Treasury managing its currency arrangements. This piece belongs to a wave of gem-insert coins that flooded the collector market through the 2010s, most produced by the New Zealand Mint on Niue's behalf. The diamond used is a genuine brilliant-cut stone, though grading and carat weight vary by batch — the insert specification is rarely disclosed in detail by the issuer.

KM#1640 has no monetary circulation history whatsoever.