Gold is the metal of kings, the ultimate money, an eternal store of value, an untarnishable embodiment of beauty. Gold is all those things. But it is not the most valuable metal you can own on a cost-per-ounce basis.

Often, platinum commands a higher price than gold. Lately, platinum has traded at an abnormally large discount to the yellow metal.

Metals investors who want to hold the most concentrated wealth in a single ounce bullion product should opt not for gold or platinum…but for a different platinum group metal called rhodium.

Rhodium is scarce and thinly traded. Frankly, it’s a little-known metal even among metals investors.

Like platinum and palladium, the primary application for rhodium is catalytic converters for cars and trucks. It is alloyed with platinum and palladium to enhance resistance to corrosion. Rhodium is also used in some types of jewelry.

Rhodium has quietly been in a raging bull market over the past couple years. Prices bottomed out in 2016 at around $600/oz. This September, they surged to over $2,400/oz and have remained there.

As impressive as that quadrupling is, rhodium still trades far below its all-time high from 10 years ago. From 2004 to 2008, rhodium launched from $500 to as high as $10,000/oz. At its current value of $2,425/oz, the niche metal still has lots of room to run.

Of course, the trade off associated with rhodium’s explosive price potential is that it also carries significant downside risk. This metal isn’t for the faint of heart.

Folks just getting started in precious metals investing should first build up core holdings in gold and silver. But more seasoned hard assets investors who want to add a high-risk/high-reward speculative component to their precious metals portfolio might consider rhodium.

The high-flying metal is currently available to investors in the form of one-ounce bullion bars. They come sealed and authenticated by either of the reputable mints Baird & Company or PAMP Suisse.