Prehnite forms as a result of hydrothermal action in mafic volcanics. In China it is also known as Grape Jade due to its nodule formations which often have the appearance of a bunch of green grapes.
Dimensions: (millimeters): 50 x 30 x 25
Dimensions (inches): 2 x 1.2 x 1
Origins: from Prospect Park Quarry, New Jersey, USA
An epimorph is a type of pseudomorph where a mineral replaces another mineral and the original mineral dissolves, leaving a hollow cast surrounded by the new mineral.
All Mineral Specimens come with a label with the name of the mineral and where it was mined
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