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 It? What Is It? What Is It? is a 2005 American surrealist film written, edited, co-produced and directed by Crispin Glover. It stars Crispin Glover and Fairuza Balk and Steven C. Stewart. As of 2008, the film has only been shown at independent theaters, typically accompanied by a question-and-answer session, a one-hour dramatic narration of eight different profusely illustrated books as a slideshow, and a meet-and-greet/book signing with Glover. "What Is It?" is the first entry in a planned trilogy directed by Glover, followed by "It Is Fine! Everything Is Fine." and continued with "It Is Mine". The "adventures" of a