Letter Grade 4.0 Point Scale (+/-) A+: 4.0: A: 4.0: A-3.7: B+: 3.3: B: 3.0: B-2.7: C+: 2.3: C: 2.0: C-1.7: D+: 1.3: D: 1.0: D-0.7: F: 0.0
Coral calcium is a salt of calcium derived from fossilized coral reefs (primarily from limestone and coastal deposits).It has been promoted as an alternative, but unsubstantiated, treatment or cure for a number of health conditions.oral calcium is a source of calcium, which is an essential mineral for human life. Coral has a chemical structure that is very similar to the composition of human bone and is sometimes used as material in bone grafts.
The truth is coral calcium supplements are made directly (uncut) from coral reefs. The only calcium source found in coral reefs is calcium carbonate, the same calcium compound that is easily found in other rocks and limestone, and has been available for commercial use for decades.he only calcium source found in coral reefs is calcium carbonate, the same calcium compound that is easily found in other rocks and limestone, and has been available for commercial use for decades.