Collectable gemstones!

Imagine gemstones called sapphires that don't have much of a purpose but they are all different colors and can be used to make colored decoration blocks like bricks, pillars, walls, and probably a chiseled variant! it would be incredibly awesome if they could color planks too! Considering this is a caves update and they only added one new ore so far, this would make sense. I get there are no plans to add new ores, but this could be cool!