Peacock Brooch In Carved Blue Abalone

Peacock brooch with hand carved bright (Natural) Blue abalone. The peacock body is sterling silver. The back panel is not marked with metal purity and I cannot test it because it has a coating. Looks like sterling with rhodium plating, but I cannot guarantee that. It is an STS piece so likely sterling.

Measure 1 7/8" wide by 1 5/8" tall.