Polished Vivianite nodule half VV112 polished slab Dimensions at widest points approximately

Dimensions at widest points approximately 200 mm x 110 mm x 15 mm thick

From near  Marble Bar in the Pilbara region of Western Australia

80 mm x 70 mm x 25 - 30 mm thick

Dimensions at widest points approximately 100 mm  x 70 mm x 7 mm thick

Beryl slab

Polished Vivianite nodule half VV112 polished slab Dimensions at widest points approximatelyVV112 Vivianite nodule cut in half with face polished. Dimensions at widest points approx. 85 mm x 50 mm x 30 mm. Weight : 183 grams. From Demons Bluff, Anglesea, Victoria. Vivianite is a rare iron phosphate and these nodules are found on the beach, washed up from their source on the ocean floor.