Vintage Sterling Silver Chain Necklace With Southwestern Green Stone Pendant

Offered is a vintage sterling silver chain necklace. The chain is marked sterling. The pendant is not marked. The pendant looks southwestern or Native and has a green stone. The piece comes in a presentation box that I do not know if is original - it says Jewels by Rio. Type: Southwest Pendant Necklace Size: pendant is about 1.25" Color: silver / green Condition: Very Good