GYPSUM IS DERIVED FROM MINED CALCIUM.

SOMETIME AGO I SEEM TO REMEMBER THAT I READ THAT GYPSUM SHOULD BE USED TO CREATE A FAST DRAINING SOIL. ESPECIALLY

IN CLAY SOILS. I'VE USED IT FOR THIS PURPOSE FOR APPROX.8 YEARS. WHEN I PURCHASED IT ORIGINALLY, GYPSUM WAS SOLD IN 40 POUND BAGS AND IT WAS A POWDERY SUBSTANCE. I'VE NOTICED THE LAST COUPLE OF TIMES I PURCHASED IT IN PELLETIZED FORM AS OPPOSED TO THE POWDEWRY FORM.WHICH IS KINDA GRAYISH IN COLOR. I AM JUST TRYING TO VALADATE WHAT I'VE DONE IN THE PAST BEFORE I MAKE THIS SUGGESTION TO SOMEONE ELSE.