- Thumbnail, 1.8 x 0.5 x 0.5 cm
- Jeffrey mine (Jeffrey quarry; Johns-Manville mine), Asbestos, Les Sources RCM, Estrie, Quebec, Canada
A beautiful, gemmy and lustrous, four-sided prehnite spear-point from the Jeffrey Mine of Quebec. A classic and uncommon prehnite crystal form, seemingly distinctive to the Jeffrey Mine. Ex. Carl Davis Collection.