Oh. Das wollte ich Euch nicht vorenthalten. Eine leider makabere Quelle belegt die Blaufärbung durch Vivianit in relativ kurzer Zeit:
Mann, R. W., Feather, M. E., Tumosa, C. S., Holland, T. D., & Schneider, K. N. (1998). A blue encrustation found on skeletal remains of Americans missing in action in Vietnam. Forensic Science International, 97(2-3), 79-86.
"Abstract: A blue encrustation was found on the repatriated remains of three U.S. Servicemen listed as
missing in action (MIA) from Vietnam after 28 years. The identification and origin of the blue
material was determined. Scanning electron microscopy with energy dispersive analysis and
powder X-ray diffraction identified the material as the mineral vivianite, Fe (PO ) ?8H O.3 4 2 2
Vivianite has been found often associated with fossilized bone and teeth, but this example is
unusual in that it is only the second published forensic example of vivianite growing from human
bone after such a short period of time. The presence of vivianite provides information leading to a
more complete and accurate understanding of the taphonomic process associated with American
MIA remains. "