This particular block will be the Nether Quartz ore block. These ore blocks will generate at any Y level in the Nether realm. They are most commonly found between Y levels 10 and 114.

Instead, these are deposits of cosmic quartz, an ore type exclusive to Planet Humble. However, while you can mine the other new ores immediately, you can't do anything with cosmic quartz while the ...

Nether Quartz Ore now spawns in the Nether. Smooth lighting now has three settings (none, minimal, maximum) More detailed death messages. Some hostile mobs now are harder in Hard difficulty.

The nether quartz is an ore that can be found in the nether. Players looking for neither quartz, unbeknownst to them, may already have it right under their noses.