Harvest Moon : The Mythic Stone, Kappa Gem, Goddess Gem

The Mythic Stone

The mythic stone is a stone that you can use to upgrade your tool into. You can get one at floors 60, 102, 123, 152, 155, 171, 190, 202, and 222 of the Spring mine beside the waterfall. When you get it, upgrade it in Saibara's shop and you will have a so strong tool. If you don't want to upgrade tools, you can sell this stone for 50,000 gold.

Kappa Gem

You can find the Kappa jewels in the Winter Mine. They can be found on levels: 0, 40, 60, 80, 120, 140, 160, 180, and 255. If you collect all 9 Kappa jewels, the Kappa will show up and exchange it for a Kappa Gem. If you equip the Kappa Gem your fatigue will slowly be replentished.

Goddess Gem

You can find the Goddess jewels in the Spring Mine. They can be found on levels: 60, 102, 123, 152, 155, 171, 190, 202, and 222. If you collect all 9 jewels, the Goddess will show up and exchange it for the Goddess Gem. If you equip the Goddess Gem your strength will slowly be replentished.