This is an older opal pendant marked 14K and with a beautiful translucent opal. The chain is 18 inches long and I think marked 14k, it is not a very large opal pendant, it is a little larger than 1/2 inch high and just under 1/2 wide . This is a pendant that you might just put on and leave on! This is an opal I might call a jelly-opal but I looked up the meaning and it was not what I was thinking. But the opal has a lovely deep look. For you from Kansas!