Guernsey’s auction house in New York will host the sale of one of the world’s most valuable private collections of emeralds.

The sale of the Marcial de Gomar Collection of rare emeralds will be held on April 25th at the Americas Society at 680 Park Avenue with online bidding at

The Marcial de Gomar Collection includes more than 20 loose cut and rough emeralds, 13 pieces of emerald jewelry, and a selection of rare gold and silver coins. The collection belongs to Manuel Marcial de Gomar, who has more than 50 years in the emerald business, spanning from the legendary Muzo mines of Colombia to the U.S. retail market. His knowledge of rare emeralds has placed him in demand as an author, lecturer and consultant. While his family continues their involvement with these gems through the Marcial de Gomar Emeralds International retail and wholesale business in Key West, Fla., it is Mr. Marcial’s lifelong personal collection that is being sold.