<Tr> <Td_colspan="2"> Problems playing this file? See media help . </Td> </Tr> <P> "Diamonds" has a length of three minutes and forty - five seconds . Allmusic critic Andy Kellman characterized it as a mid-tempo pop ballad, while Michael Baggs of Gigwise described it as a mid-tempo electronic song . Time Out's James Manning described the song as a "somber" R&B ballad . It features heavy synthesizers, orchestral sounds and electronic rhythms accompanied with Rihanna's vocal performance . Rolling Stone magazine wrote that "the track's production mainly stays out of Rihanna's way, letting the pop star build hooks with layers of her voice ." In a review of Unapologetic, Stacy - Ann Ellis of Vibe noted that an improvement in the singer's singing is evinced by ballads such as "Diamonds" and "Stay". According to EMI Music Publishing's digital sheet music for the song, "Diamonds" is composed in the key of B minor and set in common time signature, and has a moderately slow groove of 92 beats per minute . Rihanna's vocals span from the low note of F ♯ to the high note of F ♯ . </P> <P> Lyrically, "Diamonds" is a departure from Rihanna's recurring themes of unhealthy relationships on her other songs, and contains a prominent concept of love . The first verse introduces the song's concept: "Find light in the beautiful sea / I choose to be happy / You and I, you and I / We're like diamonds in the sky ." The hook continues this metaphor: "So shine bright, tonight, you and I / We're beautiful like diamonds in the sky / Eye to eye, so alive ." According to Glenn Yoder of The Boston Globe, the song shows Rihanna differently than how she is viewed by the public because of lyrics such as "I choose to be happy" and "We're like diamonds in the sky". James Montgomery of MTV News commented that she embraces the positivity and fulfillment of a realized relationship, particularly with the line "When you hold me, I'm alive", and admits "I knew that we'd become one right away". Lindsay DiMattina of Hollywood.com interpreted that Rihanna is crying out for her lover when she sings lines such as, "When you hold me, I'm alive," and "At first sight I felt the energy of sun rays / I saw the life inside your eyes ." The Herald Sun asserted that the lyrics were most likely inspired by Rihanna's private life . </P> <P> In a positive review of the song, Robert Copsey of Digital Spy gave it four out of five stars and praised Rihanna's direction towards a "softer and more prolific edge". Brittany Lewis of GlobalGrind called "Diamonds" a catchy song and felt that it had the potential to be another hit for Rihanna . Glenn Gamboa of Newsday said that, although it does not sound like an emphatic hit, the lyrical content of the song depicts a "personal shift" for Rihanna . According to James Montgomery of MTV News, "Diamonds" is more positive than previous singles such as "We Found Love" and "Where Have You Been", despite its moderate tempo . Lindsey DiMattina of Hollywood.com said that Rihanna's singing is stronger than ever . Contactmusic's reviewer described it as a "laid - back track", and suggested that the lyrical content is related to her former boyfriend Chris Brown . In a track - by - track review of Unapologetic, Andrew Hampp of Billboard found the song inspiring and commented that it "finds Rihanna doing one of her throatiest, most impassioned vocals to date". Andy Kellman of Allmusic cited the song as one of the highlights on Unapologetic, and gave it three and a half stars . </P>

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