Vintage Carved (oyster)? shell cameo Mountain Nature River Sterling Silver 925 Pendant Brooch 25mm x 33mm F197

Really nice detailed carving of a seascape on naturally domed oyster ? shell. This is a brooch with a locking clasp. It also has a bail on it so it can be worn as a pendant. The setting is marked 925 silver. I do not generally remove or alter the finish on items as often that is exactly what makes it look really authentic. I leave it up to you. It Does show minor wear which is common and expected. It is shell and very old, stress marks and lines or natural growth marks are okay, as 99% of cameos are going to have some kind of lines in them. My personal opinion on age is that it was probably made in the 1930s to 1950'sand is in a nice wearable condition...