Urchin, small St Martin's & solid 9ct gold cowrie pairWe just think these two shells sit really nicely together a solid silver urchin and a solid gold cowrie. They can be worn together or as a pair, they come together on the same chain, select the chain length from the drop down menu. The urchin is 12 mm long and the cowrie 8 mm. Solid 925 sterling silver and solid 9 ct yellow gold.