“Minute glassy to vitreous colorless to translucent white tabular matulaite crystals scattered in vuggy and somewhat stalactic limonite. Although six sided, these are pseudo-hexagonal, monoclinic, crystals as determined by the varying angle between the prism faces, better seen in the child image. S419-453 N4375N ”

“Minute glassy to vitreous colorless to translucent white tabular matulaite crystals scattered in vuggy and somewhat stalactic limonite. Although six sided, these are pseudo-hexagonal, monoclinic, crystals as determined by the varying angle between the prism faces. S419-453a N4375N ”

“Cluster of glassy tabular matulaite crystals on limonite. S419-454 N4375N ”

“Area of minute glassy to vitreous colorless to translucent white tabular matulaite crystals is in the lower portion of the specimen, with white crusty matulaite elsewhere, with vuggy and somewhat stalactic limonite. S419-664 N4375N ”

“Small crystals of matulaite (labeled M) and afmite (A) on botryoidal goethite - also present, not in this image, is beraunite. Matulaite and afmite are very similar in appearance, matulaite is clearly pseudo-hexagonal with a vitrious luster, while afmite has a pearly luster and typically exhibits the "open book" morphology as described, together with kobokobite from Bachman, in Kampf, A.R., Mills, S.J., Rumsey, M.S., Spratt, J. and Favreau, G. (2012) Mineralogical Magazine: 76(3): 517–534. N4375N S419-751. Stack of 93 images at 5 microns each. ”