From: Dictionary of American Naval Fighting Ships, Vol.V p 263

Peridot

A semiprecious stone, sometimes used as a gem, which is composed of yellowish-green chrysolite, a silicate of magnesium and iron.

Peridot (PYc--18) was built as yacht Bynuir by Defoe Boat and Motor Works, Bay City, Mich. in 1938; acquired by the Navy from Mr. Byron D. Miller of Palm Beach, Fla., 22 December 1941 ; renamed Peridot and classified PYc-18 on 27 December 1941 ; converted for patrol operations by Merrill-Stevens Dry Dock Co., Miami, Fla., between 6 January and 8 April 1942; and commissioned 1 1 April 1942, Lt. (jg) H.C. Johnston in command.

Following shakedown out of Mayport, Fla., Peridot departed Florida 29 June. With Paramount (AMc--92), she escorted three YPs to Guantanamo Bay, Cuba; thence, she steamed via the Panama Canal to San Diego, arriving 5 August. After repairs and training, she headed for duty in the Hawaiian Islands 5 October. She reached Pearl Harbor 18 October and later that month, began inter-island patrol runs under the command of the Commander 14th Naval District.

During the remainder of the war, Peridot ranged the waters of the Hawaiian Sea Frontier as an escort and patrol ship. Following the Japanese surrender, the coastal patrol yacht returned to San Pedro, Calif., in October. She operated in Southern California waters until she decommissioned at Terminal Island 3 January 1946. Her name was struck from the Naval Register 21 January 1946. She was turned over to the Maritime Commission 29 September 1946.