Where do you get mystic stone in harvest moon ds?

In Harvest Moon DS, you can obtain Mystic Stones by mining in the mines located in the game. Specifically, you can find them in the deeper levels of the mine, typically around levels 60 to 100. Additionally, you can also receive Mystic Stones as gifts from certain villagers or find them by breaking rocks in the mountain area. Make sure to have a good pickaxe to increase your chances of finding them!