Polished fossil stromatolite slab. Alcheringa narrina. ALC158 Wanong Dendritic Opal Very unusual zoning as well

Very unusual zoning as well as a cross-cutting quartz vein

190 mm x 170 mm x 21 mm thick

Contour polished Chrysoprase from near Newman

Approximate dimensions at widest points 100 mm  x 70 mm  x 40 mm thick

POT134  Tumble polished Pink Opal from Mooka Creek

Polished fossil stromatolite slab. Alcheringa narrina. ALC158 Wanong Dendritic Opal Very unusual zoning as wellALC158 Fossil stromatolite slab, polished on one side. Alcheringa narrina from the Archaean Meentheena Member within the Tumbiana Formation. Age is approx. 2. 7 billion years. From near Nullagine in Western Australia. Dimensions at widest points approx. 160 mm x 90 mm x 17 mm thick. Weighs 493 grams.