Polished fossil stromatolite. Pseudogymnosolenid type. DOG169 black jasper Dimensions at widest points approximately

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

Dimensions at widest points approximately 130 mm x 80 mm x 11

24 pieces  of mixed varieties of Australian rough gemstones

MN133  Magneprase slab

bright blue chrysocolla

Polished fossil stromatolite. Pseudogymnosolenid type. DOG169 black jasper Dimensions at widest points approximatelyDOG169 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