Vintage Sterling Azurite Earrings Signed

Beautiful vintage sterling earrings featuring a mottled blue and green cabochon that I think is azurite -- but Im not positive. Nice dramatic and dimensional design, with posts on back, no backings are included. Earrings are marked Sterling and (c) with a tree hallmark, as shown. - Size is 1 1/2" high and 1 1/4" wide. - Condition is good with just some light tarnish.