There are three colored gems in Tunic, including the blue one, which can be found in the Hidden Vault. In order to reach this area, players will need to have the right gear and weapons to make it through the Quarry. It's recommended that players track down the blue gem after retrieving the green and red ones as there are useful upgrade items to find while searching for the other two. Like the other gems, the blue gem is needed to complete the adventure in Tunic.
The blue gem is the most difficult of the three to obtain because players will need to make their way through the Quarry. There are a number of strong enemies to fight along the way, as well as pink crystals that will drain the fox's health. The crystals will also deplete the fox's overall maximum health so that they're down to only one hit with no option to recover except for saving and resetting every enemy. To negate the effects of the crystals scattered around the Quarry, players will need to find and equip the Scavenger's Mask.
Related: Where To Find The Red Gem in Tunic
There are two ways to enter the Quarry in Tunic. The first entrance is found in the overworld by taking the stairs below the belltower on the left side of the map. After going around the back, players will find a bridge with a tall knight in a green cape standing guard. The enemy can be defeated with a few well-aimed firecrackers or with properly timed melee attacks. The second entrance to the Quarry can be accessed by heading down the stairs on the right side of the mountain door. This path will get players closer to the first area they need to visit in the Quarry.
The crystals that deplete the fox's health can be negated by equipping the Scavenger Mask hidden ability card, but players will
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