Robuta

https://pure.psu.edu/en/publications/frictional-stability-of-laumontite-under-hydrothermal-conditions-/ Frictional Stability of Laumontite Under Hydrothermal Conditions and Implications for... stabilityhydrothermalconditionsimplications https://museumcollections.udel.edu/Documents/Detail/prehnite-cast-after-laumontite/215675 PREHNITE CAST AFTER LAUMONTITE - University of Delaware Museums PREHNITE CAST AFTER LAUMONTITE, Creator unidentified, Mineral specimen, Length: 2 1/4 in |Width: 1 in | Length: 3 1/2 in, University of Delaware Library,... university of delawareprehnitecastmuseums