5" Polished Wonderstone Slab - Nevada

This is a beautiful, polished slab of "wonderstone," collected from Nevada. This specimen comes with an acrylic display stand.

Wonderstone formed as a result of volcanic activity around 12 million years ago. Volcanic matter was ejected and spread around Lake Lahontan, a lake which covered much of western Nevada during this time period. Following silica rich water replacements and oxidation of iron based minerals (hematite, pyrite and goethite), this mineral conglomerate gained its stunning banded appearance.