Good Job's tear grains are large, full, complete and fresh, Job's tears are few and far between in the wild, and Job's tears have always been planted, and the surface of the Job's tears that we buy should be creamy white and smooth, with occasional remnants of yellow-brown seed coat. One end is bluntly rounded, the other end is wider and slightly concave, with a little light brown dotted seed umbilicus. The dorsal surface is rounded and convex, and the ventral surface has a broader and deeper longitudinal groove. The texture is firm, white on the cross section, powdery. The kind that is very white in color should have been treated in some way to make it look a little more pleasing, but may not be the best, as for the grey color you describe, hopefully it's not some new genetically modified product