I tested the 13w05b snapshot and I see that there is a lot of Quartz in every area. I believe that a more challenging way of earning the quartz is to add a dangerous mob that spawns on Nether Quartz. To lower the rate of the new dangerous mob, lower the amount of Nether Quartz in each chunk. Is this a good or bad idea? Let me know.
Been playing Minecraft for too long.
No Support.