Super Greensand 44 lb
Super Greensand® is a silty-clayed sedimentary rock composed of glauconite, quartz, potassium felsdspar, muscovite, and minor quantities of biotite, goethite, titanium and manganese oxides, phosphate and rare-earth elements, with particle size measuring between 4 microns and 64 microns. The glauconite grains generally measure below 3 microns. Good source of trace minerals. Fine sandy powder.