The metal that is 30 times rarer than gold is called “rhodium.” Rhodium is a rare, silvery-white metal that is a member of the platinum group of metals. It is estimated that the annual production of rhodium is only around 30-40 tons per year, compared to gold, which is produced in much larger quantities.

Rhodium has a number of unique properties that make it useful in a variety of industrial applications. For example, it has a very high melting point, and it is highly resistant to corrosion and wear. Because of these properties, rhodium is often used as a coating on other metals to enhance their durability and resistance to wear.

Rhodium is also used in the automotive industry, particularly in catalytic converters to reduce emissions. Additionally, it has applications in the jewelry industry, where it is used to plate white gold and other metals to enhance their color and durability.

Due to its rarity and the high demand for its unique properties, rhodium can be quite expensive, often even more so than gold. However, its high value makes it a worthwhile investment for certain industrial and commercial applications.