Yellowstone retains likely untapped cache of 'carbon-no cost' helium for rockets, reactors and superconductors [forty eight] The high cost ensures that rhodium is applied only as an electroplate. Rhodium has also been useful for honors or to signify elite status, when much more commonly used metals including silver, gold https://zionchfpq.uzblog.net/an-unbiased-view-of-price-per-ounce-of-rhodium-49365156