Look for "furnace" on the World Map. There is one north of the Lumbridge Palace; there are several more in different parts of Gielinor.
You can find blurite ore in the cave on the peninsula south of Port Sarim. Look for the ! on the map.
Simply mine them there's deposits almost everywhere around Runescape, the best place to go though is the Falador Dwarven mines.
A furnace is where you would smelt ores into bars.
fire
Secret mining place is deep in the wilderness of level 46 in F2P. There are 6 iron ores and 4 runite ores. that's dangerous however, you could mine iron in al kharid, or the mining guild, there are tons of iron ores to mine and theres a bank relatively close by
Go under the dwarf mine by the rope near mining cart. Find map on google to see which places have gold. There is a chance to get double ores there also if you qualify.
You will find information on ores on a website that is science orientated. How stuff works is a good place to look for information and they will be able to give you a direct definition of what they are.
JAMAICA
fire
the only way is in kilgram go to blast furnace by it will be dwarfs selling ores and bars(u need to be member)
There really isn't a best place to find gold ores, they are situated though out the isles. You can find different types of ores in rock piles. Rock isle, and the Sand isles are a good place to find ore. Good luck!
Crafting guild is a nice spot to mine gold ores.