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
What Do You Know About Rock 'N Roll? What Do You Know About Rock 'N Roll? What Do You Know About Rock 'N Roll? is the second studio album by Minneapolis shock rock band Slave Raider, released in the winter of 1988. It was the band's first album to be recorded for a major label. Despite snowballing success from a notoriously successful show at London's Marquee club, the album had little success outside of the bands dedicated fan base. After an extensive tour of London the group joined Tsangarides to record their sophomore effort. According to guitar player Nicci Wikkid, the band was impressed with Tsangarides' skills, but