Polished fossil stromatolite. Pseudogymnosolenid type. DOG169 black jasper 24 pieces of mixed varieties

24 pieces  of mixed varieties of Australian rough gemstones

bright blue chrysocolla

Dimensions at widest points approximately 125 mm x 110 mm x 19 mm thick

Dimensions at widest points approximately 90 mm x 90 mm x 4 mm thick

Polished fossil stromatolite. Pseudogymnosolenid type. DOG169 black jasper 24 pieces of mixed varietiesDOG169 Fossil stromatolite slab, polished on one side. An as yet unidentified stromatolite, form of Pseudogymnosolenid type. The stromatolite occurs as small digitate columns which are finely laminated. It probably grew in shallow water conditions with intermittent subaerial exposure. From an unassigned unit of the Wyloo Group. Age is approx. 1. 8 billion years. From south west of Newman Western Australia. Approx. 80 mm x 70 mm x 7 mm thick. Weighs 99