While attempting to mess with the generation settings to make corundum biome exclusive, no matter what it just refuses to generate. Even with the rates and rarity cranked way up, nothing will happen.

Please post a copy of your config and log.

latest.log
quark-common.txt
Here they are. I tested it with vanilla biomes too such as the dripstone caverns and still no results.

The main thing that could be an issue here is it being another mod's biome perhaps? Does it still fail if you replace that galosphere biome with minecraft:forest?

yes, I tried with forest and with dripstone cave to test with aboveground and cave biomes. Nothing