Quartzite

Currently, Quartzite is a scrapped block.

The reason for its removal was because Minecraft already has two quartz-based blocks, those being Nether Quartz and Diorite.

Another reason why the content was discarded was due to the textures being lower quality compared to other blocks.

Quartzite was meant to be the third stone variant for the Ceilum Biomes. Slate,(Pyrite Slate) and Chert being the others.

Obtaining
Quartzite can be mined with a stone pickaxe or stronger. if collected with a lesser tool, it drops nothing.

There is no way to obtain Quartzite at this time due to it being scrapped.

Trivia

 * Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. Sandstone is converted into quartzite through heating and pressure
 * It was planned that Quartzite would be replaced with another block, But as for what the block may be, is unknown.