Grossular, Prehnite
Thumbnail, 6.2 x 3.1 x 2.2 cm
Jeffrey mine (Jeffrey quarry; Johns-Manville mine), Asbestos, Les Sources RCM, Estrie, Quebec, Canada
From one of the premier grossular and prehnite localities, now closed, is this outstanding combo specimen. A huge, euhedral, lustrous, tan prehnite crystal to 6 cm is covered by rare colorless .5 cm grossular crystals. I'm not sure I have ever seen a larger prehnite crystal, and the colorless grossular is pretty rare too. 6.2 x 3.1 x 2.2 cm