CHEMICAL CHARACTERISTIC: 
SiO244%
Al2O319%
Fe2O39%
MgO27%
PHYSICAL CHARACTERISTICS: 
Combustion TempWill not burn
pH6.0-8.0
Cation Exchange Capacity50-100 m
Free Moisture<3% (total of free and intrinsic moisture)
ColorTan
Particle ShapeSmall cubes
Hardness1.5-2.0 mohs
Density5-7 1/2% #/ft3
Particle Size Distribution #4 grade: 
+160-10 %
16/5070-100
50/1000-20
-1000-10
ORIGIN:USA
PACKING:4 cubic foot paper bags on pallets.