Quartz Caves in the Nether

I feel like there is the possibility for a new "biome" or new generation for the nether with the caves and cliffs update, there could be quartz caverns in the nether that use the old cave generation. The quartz caverns would take inspiration from real life quartz caves, having huge quartz crystals, it would be hard to navigate as the crystals take a lot of space, this could also be the time to add new blocks, perhaps a coloured version of quartz or even maybe a new mob: the dweller, who is a crystallized version of a skeleton. It still needs more polish but I think it's a cool idea so far