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
I Want to Know What Love Is I Want to Know What Love Is "I Want to Know What Love Is" is a power ballad by the British-American rock band Foreigner. It was released in November 1984 as the lead single from their fifth album, "Agent Provocateur". The song hit number one in both the United Kingdom and the United States and is the group's biggest hit to date. It remains one of the band's best-known songs and most enduring radio hits, charting in the top 25 in 2000, 2001, and 2002 on the "Billboard" Hot Adult Contemporary Recurrents chart. "I Want to Know What Love Is"