The Cost of any item is dependant on the popularity at the "Grand Exchange"
You can check all current prices by going to the Runescape homepage, scrolling over to the 'Community" tab, and select Grand Exchange. Then, type in the item you'd like to have the price checked on.
Runescape
176 gold per sliver ore Price on 7/02/11
It can be mined throughout Runescape.
the price of silver ore on runescape at the moment is 91gp, it has dropped 2gp today. have fun :)
Silver bars are made from silver ore.
you can either get it from other players in the grand exchage or by this method go to the south varrock mine and there you will find silver ore
The best place for silver or is Crafting Guild, it has the most silver ore in runescape, though far from a furnace, there is also a place near varrock champions guild as well, and then there's Al-Kharid mine, you can also ( provided you have the thieving level ) steal them from a silver stall in Ardougne.
You can mine silver ore which is required to have 20 mining.
Mithril Ore is currently 488gp ( Market Price ) in the Grand Exchange.
Since this is categorized under RuneScape, I will assume your question relates to RuneScape. You can mine silver ore southwest of Varrock. A better place is west of Falador, in the Crafting Guild. The main problem with that place is that you first need to have Crafting level 40.
35
You can get silver ore in these locations:Crafting Guild MineEdgeville Dungeon MineScorpion Pit (Chasm) MineFremennik Province MineTzHaar MineWest of the Nature Altar MineSo that's all the places you can mine silver ores. I hope I have helped you