“FOV ~ 2.5 cm wide. Found Oct 2000. MOB coll. Fairly typical (but densely concentrated) tufts of yofortierite. The natrolite forms aggregates of rounded xls on the lhs. On another specimen from this find, the yofortierite is "dark bronze" and even nearly black. See [http://www.mindat.org/photo-553174.html].”

“FOV ~ 2.5 cm high. This is a stereo child photo.”

“FOV 4.1 x 5.5 mm; fibers ca 2.9 mm For the Demix-Varrenes quarry, it used to be that bronzy fibers such as these were automatically "yofortierite". However, several more recent analyses have shown that much of the lighter colored material from here is actually tuperssuatsiaite (or “tuperssuatsiaite-like” – these minerals have generally poor XRD patterns). Obviously, the fibers shown in the photo look very light. But appearance is in the eye of the beholder – or rather it is a function of the illumination and reflectivity. The fibers on this specimen are “actually” quite dark. But they are very reflective – so much so, that it is hard to arrange the lighting so that all of the fibers on the specimen appear to be dark at the same time. (See the macro “related” photos.) The material from this particular find has not been analyzed, but some of it is very dark indeed. So despite the very “ bleached-blonde” appearance of the fibers in this photo, I think that it is all yofortierite. One of the child photos shows these same fibers under different lighting, which makes them look darker. Other child photos show fibers that seem to be “intrinsically” darker, but even these are quite reflective. ”

“This is a stereo child photo. See the parent for discussion. ”

“FOV 4.1 x 5.5 mm; fibers ca 2.9 mm Thi child photo shows the same fibers as in the parent photo under different lighting, which makes them look darker. (However, "proper exposure" made the fibers look fairly bright anyway.) Other child photos show fibers that seem to be “intrinsically” darker, but even these are quite reflective. ”

“FOV 3.7 x 5.9 mm. This is a stereo child photo showing some of the "intrinsically" darker fibers. But even these fibers are quite reflective. I deliberately tried to avoid reflections - but got them anyway. There is no angle of view that avoids reflections entirely. ”

“FOV 6.0 x 4.4 mm; fibers ca 2.5 mm This is an unusual "underside" view of the yofortierite. In this case, the matrix has peeled away, leaving the nucleation point exposed. These are among the darkest yofortierite fibers on the specimen - but still quite reflective. ”