Natural Gold in quartz matrix ( gold specimen )– Australia Natural gold specimen found in Australia by a prospector using a metal detector. This piece features a naturally sculpted shape, typical of Australian goldfields, with a beautiful matte golden patina and some iron oxide inclusions characteristic of the terrain. Origin: Australia ( Kalgoorlie - Western Australia ) Discovery Method: Metal detector ( Minelab GPZ 7000 ) Weight: 0.62 g Dimensions: 11 mm x 8 mm x 7 mm Estimated Purity: Approximately 22–24 carats ( Australian gold is the purest in the world ) This specimen has been slightly cleaned with acid, other than that, it is just as it was found by the prospector. A superb addition for mineral collectors, natural gold enthusiasts, or investors seeking truly unique pieces. A black display case with a transparent lid is included with the specimen.