Graphite has the same chemical composition as Diamond, which is also pure carbon, but the molecular structure of Graphite and Diamond is entirely different.
The California king size is a mattress measuring 72 inches wide by 84 inches long. In terms of length it is four inches longer than the standard king and queen size mattresses. The mattress was made by David Bergeson of California sometime in 1982.
California King (usually called 'Cal King') is 72 wide x 84 long. The Cal King is the longest bed commonly available at 84. Potential drawbacks include the bed not being wide enough for 2 adults or the length not fitting easily into the room.