Quartz Tools
Glowstone (Maybe)
Blackstone tools
Granite, andesite, diorite and arenite
Redstone (With blocks)
Lapis

These are great suggestions, but honestly, I'd like to keep the mod clean for people looking for obsidian and emerald equipment only. This potentially could be worked into a separate mod though, so I'll keep these in mind.

Sorry, im brazilian. In arenite, meant sandstone