Rhodium
Rhodium is a very, very rare metal. So much so that the price of kilograms is measured in millions of dollars. Rhodium is a rare metal that is also a member of the platinum group.
An example of rhodium being incredibly hard to find is how it's found, this rare metal found in nature in copper and nickel ores, but the highest available amount is around 0.1%... This might explain why it's so precious. Although rhodium actually becomes radioactive with chemical steps, it is also used in vehicles. They are used in catalysts, also called catalytic converters, and are involved in reducing the number of nitrogen oxides. Since it is also in the platinum group, it has a serious shine and reflective feature. The use of even trace amounts allows it to reveal these properties.
Thanks to its brightness, it is also widely used in the automobile industry. For example, if you pay attention when the car headlights are turned off, there is a serious reflective layer inside. It is the element rhodium that gives this layer that reflectivity. Of course, mirrors and the optics industry cannot be missed. Rhodium is an element used in mirror glazes and also used in the optical industry. Rhodium is an element that needs a lot of attention. Although it is estimated that it can cause serious damage to the skin, many sources say that there is no research or case on the effects of rhodium on human health.