Polished Vivianite nodule VV101 polished rock All reasonably uniform in size

All reasonably uniform in size (roughly 15 - 20 mm diameter}

Weight  is 205 grams

The clasts in this example are comprised mainly of banded jaspers

Brecciated Snakeskin Jasper rough rock

Dimensions approximately 180 mm x 70 mm x 7 mm thick

Polished Vivianite nodule VV101 polished rock All reasonably uniform in sizeVV101 Vivianite nodule cut in half with both faces polished. Dimensions of entire nodule at widest points approx. 95 mm x 55 mm x 65 mm. Weight : 432 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.