@Benerci 2 July 2021 more from that month

7 Most Expensive Items in the World 1- Antimatter (100 Trillion USD/gr) 2- Californium (27 Million USD/gr) 3- Painite (300 Thousand USD/gr) 4- Diamond (65 Thousand USD/gr) 5- Tritium (30 Thousand USD/gr) 6- Taaffeite (20 Thousand USD/gr) 7- Plutonium (20 Thousand USD/gr)