This is an Australian Boulder Opal cabochon accented with a diamond and 24K foil overlay. This opal has a nice flash of green when turning.
This is a two-piece pendant hangs that swings from the upper part. The half-circle at the top is hand-stamped and attached to an 18-inch rolo chain.
.The back has been stamped with the .925 hallmark and maker's mark.
1-1/2 inches (38mm) high.
The chain measures 18 inches.