Dolomite should not be used as a calcium supplement because the calcium in dolomite is not readily available to your body's chemistry. Also don't buy combination supplements for there calcium content. Calcium supplements should be just the appropriate calcium by itself and should be taken without other minerals. Vitamin C and vitamin D are also important vitamins for working with the body's pH and calcium balance. If your system is strongly acid taking large doses of Vitamin C would drive the system farther acid causing strain on your body's systems.
Vitamin D has the same effect on an alkaline system.
The ideas pH range which maintains the best calcium and mineral uptake, along with the best utilization, is 6.3 to 6.5. Others include calcium citrate, calcium aspartate, calcium orotate and calcium gluconate. The best forms of calcium are pure calcium gluconate, calcium lactate, and calcium citrate. In order for the calcium to react correctly in the body to control the acid-base balance the correct type must be used. Calcium lactate is used as a strong acidifying calcium.