you get a hammer and press A on the rocks a couple times.
Ship ten Limestone and Fertilizer will become available in the Seed Shop. Use your Hammer to smash Rocks in the Cave near Jamie's ranch to look for it. Limestone is a white Ore.
You can find it in the bottom floor of the first mine if you smash the rocks there.
In harvest moon tree of tranquility you are supposed to smash the rocks with your hammer when it is smashed into tinier pieces pick them up , you will not find it in your ruck sack, you will find it in the carpenters building.
you go into the mines(any one will work) and smash a bunch of rocks with your hammer
once you unlock the first mine on the 6th floor there will be that ore in the rocks just smash it with your hammer
It can be used to cut weeds or defeat the evil monsters in the mines. If you press the 'A' button in front of the rocks either side of the waterfall it will smash the rocks.
Wait until winter and go to the lake.Walk to the cave in the middle of the lake.Then go to level 11 or higher and smash alot of rocks with your hammer.You should find diamonds,saphires,emralds,rubys,aquamarines,and more!Each sells for 25-500$!
To get Material Stone you must use your Hammer to smash rocks. Or you can hire the Orange Sprite Team to collect materials for you.
You use the hammer either from tanya's shop or the one Gordon gives you and attack the rocks to smash them
once you unlock the first mine a couple of floors down (only 10) you will find silver in the rocks once your smash them with your hammer
Get the HM Rock Smash
For wood: you have to chop logs that are scattered on the floor For stone: use a hammer to smash rocks or boulders For gold: dig it up in the mines