Currently, the recipe for Philosopher's Fuel, which is used in the creation of the ATM Star, contains an ingredient which is any from the tag #minecolonies:blacksmith_ingredient_excluded. This allows any of over 1,000 different items, most of which aren't burnable in a regular furnace.

I would expect that the eighth ingredient (which is that aforementioned tag) should be some fuel item that burns long in a Furnace, such as buckets or fluid cells made of LPG, Insanium Coal (Block), or (double/triple/etc-)compressed Coal Blocks, or something else entirely.

the way i understand it, the recipe for the atm7 is .very. wip, and will change. :) it was a copy of the atm6 star initially, and will still be tweaked for proper atm7 integration.

Yeah working on getting some more quests in and adding some more mods then gotta work on the star more. It was mostly a WIP goal while we fixed other stuff like said above. Some compressed items till drop in how compressed and some will be swapped to other items but thanks for letting me know.

Closing as the tag was replaced by an endgame Twilight Forest Item in ATM7 0.4.19 (#1186).