USS Goldcrest (AM-78) was a minesweeper acquired by the U.S. Navy for the dangerous task of removing mines from minefields laid in the water to prevent ships from passing.

(later renamed Stella Polaris); acquired by the Navy 27 October 1940 (from then owner, Mr.Livingston Short); and commissioned 31 January 1941.

Throughout most of World War II Agate was assigned to the 15th Naval District where she patrolled the Panama Canal.

She departed the Panama Canal Zone 12 August 1944 en route to Philadelphia, Pennsylvania.

2010, extensive upgrades, overhaul, and re-conversion to yacht status in San Diego, Ca.