Carbonado in the pores that are common in carbonados, they may have been introduced after carbonado formation. Inclusions of other minerals, rare or nearly absent in the Earth's crust, are found at least partly incorporated in diamond, not just in pores: among such other minerals are those with compositions of Si, SiC, and Fe‑Ni. No distinctive high-pressure minerals, including the hexagonal carbon polymorph, lonsdaleite, have been found as inclusions in carbonados, although such inclusions might be expected if carbonados formed by meteorite impact. Isotope studies have yielded further clues to carbonado origin. The carbon isotope value is very low (little carbon‑13
What Is Life "Rolling Stone" readers' poll, titled "10 Greatest Solo Beatle Songs", the song placed fourth, with the editor commenting: "The track is deceptively simple, and more layers become apparent the more often you play it." "What Is Life" has featured in Bruce Pollock's book "The 7,500 Most Important Songs of 1944–2000", Treble website's "The Top 200 Songs of the 1970s" (ranked at number 101) and Dave Thompson's "1000 Songs That Rock Your World" (at number 247). "What Is Life" was included on the 1976 compilation "The Best of George Harrison" as well as 2009's "". The song has also been featured