Spiny Oyster Necklace with Feather Dangles

Sterling silver burnt orange spiny oyster cab with two feathers dangling. Measurements are 18" from chain end to end, including feathers on chain, cab measures one inch by 1/2 inch, feathers dangle 1 3/4" inch from spiny oyster cab. Stamped on back is bear fetish with initials "RB" inside and sterling.