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
Now That's What I Call Classic Rock Hits primary goal of being able to please most of the people most of the time with a wide-ranging selection of hits that should fit into most anyone's definition of classic rock." Now That's What I Call Classic Rock Hits Now That's What I Call Classic Rock Hits is one of many genre-themed compilation albums from the "Now!" series in the United States, this one focusing on popular classic rock songs from the 1970s. It was released on May 1, 2012. In his review for Allmusic, Gregory Heaney says "the Now series delivers a dose of good ol' classic rock with