14k gold ring constructed by judd jewelers in New Mexico in 1983 with natural Colombian emerald we bought in Jan '83 in Colombia. The emerald is 3.42 carats and 2 diamonds on each side. Appraisal papers are from back then. No mention of oil treatment. Small chip on side. Needs repolish and maybe recutting.Excellent color and quality. Possibly chivor mine could be muzo I can't remember it's been so long ago.