High Quality Content by WIKIPEDIA articles! The Sardonyx was originally a steel-hulled yacht with diesel engines, built in 1928 as the Queen Anne for Mr. Alexander Dallas Thayer at the Germania-Werft shipyards in Kiel, Germany. According to United States Government publications from 1941, the USS Sardonyx was the sister ship to the USS Opal (PYc-8), formerly Irving T. Bush's and Marian Spore Bush's motor yacht Coronet; both yachts were built at the same yard in 1928.

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