Tags: Chemical Substance, Mineral.
Slocum stone (sometimes sold as Slocum opal) is an early opal simulant which was briefly popular prior to the introduction of synthetics and less expensive simulants. It was named after its inventor John S. Slocum of Rochester Michigan.John Slocum experimented during the 1960s with various methods. In 1971 he began marketing his first commercial simulant under the Opal Essence trade name.
