Huge Art Deco pendant circa 1920's-30's. Black onyx, rock crystal, 18K yellow gold, 18K white gold or platinum, and 25 diamonds! Measures 2.5" bale to bottom and 2.25" at widest point!
Rock crystal is free moving.
18K white gold or Platinum
(I tested it out at Platinum, but my jeweler guessed it was white gold by the mark)
Marked (and this is a guess because it is NOT CLEAR)18CT or 18UT or 18VT
followed underneath by 985 or 995