Yes, they are supposedly going up to 21m ea in the next couple of weeks but then no one will be buying them
Probably the same price as always, below I have posted a link to an accurate price guide, that may help you in the future.
Because supply is increasing faster than the demand.
Hard to tell at the moment, they are a training items so I suppose they eventually would.
The price of normal monthly Runescape membership for your country x12.
24.8m now
The price of granite can go up due to factors such as increased demand, fluctuations in supply, rising production costs, and market speculation. Additionally, unique patterns, colors, and rare varieties of granite can also drive up prices.
Granite counter tops cost 48$-150$ per sq. foot Granite tile cost $4-$20 per sq. foot. The price of granite very's so much that it mostly depends on the type of granite. Example:Granite tile price's at home depot:$5.00 sq. foot for black granite$7.00 sq. foot for Brazilian green granite$10.99 sq. foot for tan brown graniteand for counter tops, it cost $48.00 sq foot. at the lowest.Note: prices are of 6/28/10 this is not from home depot. And the price of granite changes from year to year.
Probably when a price is too high.
The RuneScape subscription price in the U.S. for new players is $7.99 They increased the price to fund future game expansions and updates.
Quartz is usually a little more expensive than granite. Quartz is harder than granite and less likely to ship or stain, though I have had granite for over a year now in my kitchen and love it!
The price changes everyday for pretty much every item in runescape. So by the time I would tell you the price would probably be different.
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.