Formation and Nature of Pearl: Pearl is secreted by the mantle of the pearl oyster as a protection against foreign objects which may be sand particles, minute larval forms or other such things. To study the mode of formation of pearl it is essential to know the structure of the shell and mantle.
Carbonite is a cloud-based solution optimized for individuals and small businesses seeking secure offsite system backups, which will protect them in the case of a disaster. Large corporations can pretty much afford private cloud systems for backup and subsequent disaster recovery efforts.
Graphite is a polymorph of the element carbon. diamond is another polymorph. The two share the same chemistry, carbon, but have very different structures and very different properties.