Carbonado typical gem diamonds. Lead isotope analyses have been interpreted as documenting crystallization of carbonados about 3 billion years ago. The carbonados are found in younger sedimentary rocks. Mineral grains included within diamonds have been studied extensively for clues to diamond origin. Some typical diamonds contain inclusions of common mantle minerals such as pyrope and forsterite, but such mantle minerals have not been observed in carbonado. In contrast, some carbonados do contain inclusions of minerals characteristic of the Earth's crust: these inclusions do not necessarily establish formation of the diamonds in the crust, however, because while these obvious crystal inclusions occur
Now That's What I Call Rock Now That's What I Call Rock Now That's What I Call Rock is a compilation album released on January 22, 2016, by the distributors of the popular "Now That's What I Call Music" series in the United States. The collection brings together a diverse group of artists from a range of styles such as "EDM textures, summer festival blues-rock chug, arena alternative, post-Tool hard rock, triumphant psych-pop and cosmopolitan retro experiments." Despite the popularity of the "Now" albums, rock compilations have been an area of neglect by record companies. To reach out to a broad audience, the first rock volume