Carnelian Fish Set

I had this set made for me by a very talented artist. The sterling silver necklace is 20" with a half inch extender. The sterling silver earrings are just over an inch and a half. Both are made up of Carnelian, Fire Opal and peach color pearls. I THINK the necklace fish is Agate but I'm really not sure. The fish on the earrings are not sterling. Have a beautiful day