The huge furnace in "Eidolon Parlu" is a very useful special facility in the game. If you want to use the huge furnace to make hexagonal crystals, you can unlock it in the technology menu. The unlocking conditions are level 56 and consume 1 For technology points, the required materials are 5x chromite, 12x hexagonal quartz and 20x ore.
How to make hexagonal crystals in the huge furnace of Phantom Beast Palu
To create a hexagonal crystal through a giant furnace, you first need to unlock it in the technology menu. The unlocking requirements are level 56 and consume 1 technology point. After that, you need to collect the following materials:
5x Chromite
12x Hexagonal Crystal Quartz
20x Ore
Chromite can be found throughout Skyfall Island, but you'll need to use a metal detector to find chromite deposits. Hexagonal quartz can be collected from the huge crystals on the island of Skyfall. Ore is very easy to find as it can be found almost all over the map.
Place all of these materials into a giant furnace, make sure the furnace is powered, and assign it a Fire Palu with the Ignite ability. The higher the pallu's ignition ability level, the faster you can obtain hexagonal crystal metal bars.
