I had the idea that the following five Ultra Space Stone-based ores would generate in Ultra Space:
- Ultra Space Ruby Ore
- Ultra Space Sapphire Ore
- Ultra Space Amethyst Ore
- Ultra Space Crystal Ore
- Ultra Space Emerald Ore
I thought the gemstones (besides Diamond) seemed like good ores to include in Ultra Space because Pixelmon Ultra Space is known for being where you obtain a particular kind of crystal, the five ores all match each other apart from palette, and the gemstones aren't overpowered yet are still nice to find as move tutors could ask for them.
The textures for the Ultra Space variants of these ores could be the normal stone variant ores with the stone replaced with the Ultra Space Stone texture with the color changing property (which only applies to the stone, not the gems). Or, you could have the gems in the Ultra Space Stone versions come in the shape of the crystals in the Ultra Desert Gilded Sand, but have the corresponding gem color. Or, you could have the ore textures be something new like two or four rhombus-shaped gems placed diagonally on top of Ultra Space Stone.
You could have it that all Ultra Space ores generate in the Ultra Space Stone of all biomes, or you could have it so each Ultra Space biome gets 1 of the 5 ores (duplicates allowed), or perhaps each Ultra Space biome has its own set of 2-3 gem ores that generate in it.