Marvelous rare cubic Prehnite crystals from the famous Jeffrey mine, Quebec, Canada. They are very well shaped and sharp with perfect cubic shape up to 11mm big. The crystals are tobacco colored. They have strong waxy luster. They show some translucence to transparence. For references see the 2013 issue of The Mineralogical Record vol. 44, # 4. In excellent condition – some outside edge contacts. On acrylic base.

Superb Prehnite!