I don't think the price will be stable at more than 200 gp for every 500g of granite unless most of those miners turn to other way of making money. -- try make some rough calculation, if 1k 500g granite can be obtained within an hour, that's around 200k profit if it is 200 each which is almost the best money making way for those lower to mid players and this will make most of them still stick to the mine except for those higher level players and then the price may stabilized. Furthermore, it is not cheap to get summoning level from 74-85 with cheap granite, many players know that the most expensive part in summoning is the need of chards, if you make granite lobsters from level 74-85, you do need around 6.6k pouchs which multiply by 166 shards each and give around 1.1 mil shards = 27.5 mil gp and you get back 70% of it = 19.25 mil gp if you trade in for shards, so there is over 8 mil cost for raising the level only from 74-85. If this is consider cheap to you, then 500g granite at 1k each only add up 6.6mil which is also cheap to you too.====> why bother then ? Many players argued that summoning is worthwhile and can make good money but trust me, most of the players wouldn't bother to spend so much time to use all those pouches they make but instead only use some of them that are really worth it, most of those pouches will be sold or traded in for shards and this happened to make summoning another money sinks like construction to remove gp from the game so that there wouldn't be high inflation of items price which threaten the joys of newcomer too much. (Take the above example, with 6.6k granite lobsters, how long it will take you to use all of them to make money in the game ????) Lastly, I haven't notice Jagex make any limit on those materials that give no profit to players directly while training skills on those materials. instead, there may be a lowest greater than 0 gp to make those items still sellable.
