This coin’s reverse design is punctuated by a Murano glass monarch caterpillar with vivid yellow. Black and white stripes which are the tell-tale sign it is a monarch larva. The glass monarch caterpillar. Is poised on the leaf of a swamp milkweed plant designed by Canadian artist Maurice Gervais that has. Been selectively coloured to showcase the plant’s long leaves, and its clusters of pink flowers to best. Murano glass coins from the Royal Canadian Mint are highly sought after today for their beauty and. Because the Murano glass monarch caterpillar has been fashioned by hand, each coin is. FEATURES: Produced By: RCM Denomination: 20 Dollars Year: 2018 TECHNICAL SPECS: Diameter: 38 mm Material: Silver Fineness: 0.9999 Weight: 31.39 grams Bullion Weight: 1.009 Troy Ounces EXTENDED INFORMATION: Obverse: Queen Elizabeth II Reverse: Murano Glass Monarch Caterpillar on the leaf of a milkweed plant Artist: Maurice Gervais Finish: Proof Series: Little Creatures Series Quantity Produced: 5,000 Monarch: Queen Elizabeth II Theme: Canadian, Royal Canadian Mint, Wildlife.