Epidote with well-formed prehnite sphere Sandstone and this piece—like pyrite—does not

and this piece—like pyrite—does not seem too

Approx dimensions: 4 x 2 x 1

giving it the appearance of moss or lichen

UV reactivity: the presence of iron dampens any reaction in the brown calcite

In images showing a right angle over the tower

Epidote with well-formed prehnite sphere Sandstone and this piece—like pyrite—does notLocale: Imilchil, Midelt Province, Dra Tafilalet Region, Morocco Approx dimensions: 2. 5 x 1. 5 x 1. 25" Approx weight: 115g After some sleuthing on Mindat I was intrigued to discover the spherical formation on this specimen is prehnite. I actually didn't find one matching this specimen anywhere; all examples were translucent and not opaque. I suspect it could be a feldspar pseudomorph. Prehnite typically does not fluorescebut this one does. Prehnite