It is easy to discern that these were once vivianite crystals by their bladed nature, some doubly terminated and 3.0 cm in length. They are now turned to a burnt-umber color by santabarbaraite, a rare hydrated iron phosphate. A truly unusual pseudomorph! Very few of these were recovered in a series of phosphate pods mined through in the 1990s. I have seen several dozen good Santabarbaraite specimens out of LITERALLy thousands of vivianites and dozens of specimens of anapaite from here. This is, truly, uncommon. And, best of species, I am told.