A silver and amethyst necklace the design attributed to Arthur and Georgie Gaskin, oval wirework

A silver and amethyst necklace the design attributed to Arthur and Georgie Gaskin, oval wirework frame of flowers and tendrils, set with central abalone shell, and four polished amethyst stones, below larger amethyst cabochon, the chain with smaller wirework panels set with abalone shell, on link chain, unsigned, 4cm. long (pendant)