Can you make an rhodium, osmium alloy ring?

They are both in the platinum family so melting points are VERY high and cost for the metals is also very high. Be prepared to pay a hefty amount for the manufacture. So the answer is yes you can, but it will be expensive. read more

It must be an alloy. The reaction is slow that changes osmium to osmium tetroxide, but it will kill you. Your skin and kidneys should be fine, however your eyes and lungs would be the first things to go. Consider instead, an iridium ring. Or if you like precious metals, maybe rhodium or platinum. read more