The Goddess Jewels are 9 collectible items in Harvest Moon: Friends of Mineral Town. You can find these jewels on specific floors in the spring mine. You can then combine these jewels to form a useful item that recovers your stamina.
Collecting 9 Goddess Jewels is a requirement to marry the Harvest Goddess.
Goddess Jewels Location
You can find a Goddess Jewel by breaking rocks on floors 60, 102, 123, 152, 155, 171, 190, 202, and 222 of the Spring Mine. Individually, these jewels are worthless, but once you gather all 9, they transform into the Gem of the Goddess.
It is best to find the Goddess Jewels starting in Year 3 when you’ve collected Power Berries. You’ll have more stamina when you’ve collected several Power Berries, which will allow you to dig deeper into the mine.
Important Note: Before you attempt to collect the Goddess Jewels, you must purchase the shelf from the TV Shopping Network. The jewels will not appear unless you have the shelf in your house.
Tips for Finding the Goddess Jewels
Save your game before going down the stairs leading to a floor with a Goddess Jewel. Descend the stairs and start breaking rocks.
If you didn’t find the jewel fast enough or you’re consuming a lot of stamina, reload your old save. This will save your stamina and you can go deeper into the mine before running out of stamina.
Bring items to recover your stamina and fatigue. Items like Bodigizer and Turbojolt will be useful here. If you have a fully furnished kitchen, you can make Elli Leaves, which can recover a ton of both stamina and fatigue.
The Gem of the Goddess
You can make the Gem of the Goddess by collecting all the Goddess Jewels. The Gem of the Goddess acts like a tool that you can equip in your active tool slot. Your stamina will gradually recover when you have the Gem of the Goddess equipped.
Equipping the Gem of the Goddess is the only way to recover all of your stamina besides sleeping. You need to be outside when you want to recover stamina, because the effect only works when time passes by.
Tip: Time is frozen inside any of the mines, so the Gem of the Goddess is useless when mining.