Unlike gold, which can be filled with tungsten, osmium is the densest element. Any core made of another material would immediately change its weight or volume.
Osmium is roughly 1,500 times rarer than gold. Only about 22 tons of raw osmium are estimated to exist globally. buy osmium bullion
Some market analysts suggest a permanent halt to new crystallization by late 2026 due to the proprietary nature of the process, which could trigger extreme future scarcity. Osmium as an Investment - Quest Metals Unlike gold, which can be filled with tungsten,
Raw osmium powder (osmium sponge) can react with air to form toxic osmium tetroxide ( OsO4cap O s cap O sub 4 ) gas and is not considered investment-grade. Investment Considerations which can be filled with tungsten