Sunset Jasper polished slab SU163 striped Prehnite slab

Prehnite slab

Approximate weight of each piece is between 139 and 229 grams

Dimensions at widest points approximately 130 mm  x 100 mm wide x 8 mm thick

80 mm x 80 mm x 20 mm thick

Sections consist of a chaotic mixture of dolomite and/or stromatolite fragments set in a matrix of mudstone and/or coarsely crystalline dolomite

Sunset Jasper polished slab SU163 striped Prehnite slabSU163 Sunset Jasper slab, cut and polished on one side. Dimensions at widest point approximately 155 mm x 95 mm x 9. 5 mm. Weighs 270 grams. From the Jeerinah Formation in the Hamersley Ranges, Western Australia. More correctly an iron rich, banded chert.