First recorded (as a demo) by Jimmy Radcliffe (1964).
First released by Sammy Ambrose (US #117 1965).
Other hit version by Gary Lewis & the Playboys (US #1 1965).
Also recorded by Al Kooper (1976).
From the wiki: “‘This Diamond Ring’ was written by Al Kooper (who would later record with Bob Dylan, and found the group Blood, Sweat & Tears), Bob Brass, and Irwin Levine (‘Tie a Yellow Ribbon’, ‘Candida‘) in 1964. The song was first recorded as a demo that year by Jimmy Radcliffe in a session produced by Kooper.
“In 1965, Sammy Ambrose recorded ‘This Diamond Ring’ as the first commercial release of the song. Ambrose, a Miami-born singer, had begun his recording career fronting the Afro-Beats (which included members of Betty Wright’s family). Both recordings were released on January 9, 1965, ‘Bubbling Under’ the Billboard Hot 100 – Ambrose’s recording at #117 and the Playboys’ recording at #101. That would mark the only chart appearance for Ambrose while the Playboys continued the ascend the Hot 100 to #1 on February 20, 1965, becoming the group’s only #1 single of their career.
“I suppose Ambrose’s biggest liability was that he didn’t have the same caché as being the son of a famous comedian (name recognition is everything in show biz) nor could make use off the chutzpah of producer Snuff Garrett, who promised radio disc jockey Murray the K a performance by the Playboys if he could break the Playboys’ record in New York City, and who also got Gary’s famous dad to call Ed Sullivan about booking an appearance on the The Ed Sullivan Show.
“None of the Playboys played their instruments on the hit recording and Lewis’s vocals were heavily supported by Ron Hicklin’s overdubs. The music was performed by members of The Wrecking Crew, including Hal Blaine (drums), Carol Kaye (bass) and Leon Russell (keyboard).