Name says it all, it's used to store Coal that has been mined.
You need level 30 mining to mine Coal in Runescape.
in runescape, you can find coal in the dwarven mines, the alkharid mines, barbarian village, some places in the wilderness, and cockroach workers and drones drop 1-2 noted coal.
anytime when you have suffusion coals.
Where download money bag 10.5 for runescape
for carrying dice
You get 50 mining experience for every coal you mine.
It would depend on where you bought your coal. In local shops you can buy bags of coal in 10kgs and 25kgs. Coal delivered by a coalman is usually 50kg bag.
Iron and coal.
30 each
you have to mine it from many mining places around Glennindor
barb village
why dont you stop being a noob and play real "runescape"