Antique 10K Gold Filled Prehnite or Jade Cabochon Brooch Pin

Antique 1/20 10K gold-filled brooch featuring a pale green domed cabochon, likely prehnite or nephrite jade. Set in a scalloped bezel with a secure working pin back. Reverse is marked 1/20 10K G.F. Wear consistent with age. Stone has not been gemologically tested; please review photos for condition and your own assessment.