Minerals are things that come from the ground like rocks, metals, and gems. When people want to use minerals, they have to pay money to get them from the earth. Mineral economics is when people study how to get the minerals out of the ground and how to sell them for the most money.
Imagine you have a candy factory, and you need sugar to make your candy taste sweet. You could get sugar from many places, but the place that has the most sugar might be far away. You would have to spend money to send people to get the sugar, bring it to your factory, and then turn it into candy. Mineral economics is like this but with rocks, metals, and gems instead of sugar.
Sometimes, minerals are easy to find and get to, which means they don't cost too much money. Other times, they are deep in the earth or in a different country, which means people have to spend more money to get them.
Also, sometimes the price of minerals goes up and down, just like the price of candy. When a lot of people want the same mineral, like when everyone wants silver for their jewelry, the price of silver goes up. But if no one wants a mineral, like when everyone is eating less candy and doesn't need as much sugar, the price goes down.
So mineral economics is basically like being in charge of a candy factory, but instead of sugar, you are trying to find and sell things that come from the ground. It's important to know how to get the minerals for the least amount of money and how to sell them for the most amount of money so that everyone makes a profit.