“Isokite is a relatively rare phosphate usually known as grey crusts from some phosphate pegmatites. This specimen was found in 2009 in the pegmatite of Assunção. In this case, Isokite doesn't form whitish earthy crusts but massive brownish or greyish masses and veins in contatct with triplite. Paragenesis and age relations show that Assunção isokite grows at the expense of earlier formed triplite. XRD analysis: Isokite (brownish/greyish mass) and Triplite (brown mass). Picture width ~ 85 mm. Rui Nunes' specimen and photo, April 2021. ”