Oolitic aragonite sand
Oolitic aragonite sand forms in tropical waters. Most of the topography of the Bahama Banks is composed of calcium carbonate oolitic aragonite sand material.
The natural formation through precipitation and sedimentation of aragonite sand in the Bahamas surpasses anyplace else in the world. There are billions of tons of this type of sand material in reserve and millions of tons more created annually.
Commercial uses are similar to limestone and other high calcium carbonate materials. One popular use is in reef aquariums.