5 Dollars - Elizabeth II Murrine Millefiori Glass Art 2016

Murrine millefiori is a Venetian glassworking technique dating to at least the 16th century, in which colored glass rods are bundled, fused, and cross-sectioned to reveal floral or geometric patterns — the name translates roughly as "thousand flowers." Embedding a hand-cut murrine slice into a struck silver coin requires the glass insert to be individually fitted after minting, making each piece fractionally unique in its patterning regardless of die consistency.

Cook Islands has issued novelty bullion under licensing arrangements since the 1990s, with the physical production contracted to external minting facilities rather than any domestic mint.