BEGINNER

You should start by mining a lot of tin/copper. If you would like to bring up your smithing level as well as mining, mine the same amount of tin and copper. When your mining level is around 40 of 45, you can mine coal easily. If you start mining coal at level 30, when you unlock the option of mining coal, you will get barely any coal, because of the higher-level miners.

INTERMEDIATE

Now you can mine coal. Go to the Dwarvin mines west of Edgeville, north of Fallador. Here you should go the southeastern most point. You will see some scorpions, and some coal/gold. Mine the coal here and go up the stairs to the east and follow the people/path to get to the bank. When your mining level is 60 or higher, you can go into the mining guild, in the southern most part of the mining guild. Here it is loaded with coal, and 5 mithril rocks.

MAKING THE MONEY

Amount	Selling Price
1-100	150 each
100-1000	180 each
1k- ……	190-200 each

Now that you have a lot of coal, you can sell it. Depending on how much coal you have, you can sell it for specific amounts.

Some people sell for more, and some people sell for less. You will have to find out what price you are comfortable with.

CASHING IN

Now you should have a good amount of money, and like before, some people sell for less. This is where you cash in. Buy the low sellers' coal. Even if it is 2 coals or something low, it will pile up. And when you spend all your money, sell those coals for a higher value. Now you could even double your money.

BANK IT

You now know how to master the market with coal. This guide is more for training for cash, and less for learning the merchanting style of getting money. Keep an eye out for my new articles coming soon: Making Money with: Fletching, Smithing, Fishing, Wood Cutting, Prayer, Runecrafting, and more!