I have this silver pendant that has this inset carnelian cabochon in it as well as 4 smaller stones on the edges. It is unmarked but tests positive for being silver. It measures approx. 1 1/2" long and 1" square and is hinged so that it has a compartment in it. It appears to be Middle Eastern but beyond that I do not know what it was used for. Any info would be greatly appreciated. Thank You.