If anyone can identify the marks on this brooch I'd be very appreciative. I would think from the design that it's c. 1930. Also, I've never seen this stone before and I'd like to know what it is ...the bottom of the stone looks like it was dyed blue.
Thanks a lot, Joe
The stone appears to be jasper, I can not explain the blue underneath the stone. Stylize it appears to be from the mid-20's and northern Europian manufacture, though I am sure someone will chime in with a decyphering of the marks.