Gold Leafed Phrenite Natural Slice focal bead exhibits a vitreous luster on the natural crystal structure. The untreated Prehnite slice has been gold leafed on the sides with 1 ring on the top. The Phrenite slice shows natural internal features. These range from 18 -25mm in width with an average thickness of 4mm. We will try our best to match them but please be aware that these slices aren't well matched.