Slocum stone

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 L. Slocum (1920-1998) of Rochester, Michigan.

Slocum stone

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 L. Slocum (1920-1998) of Rochester, Michigan.