Deepslate

Deepslate is a stone variant that functions similar to regular stone.

Breaking
Deepslate can be obtained only by mining it with a pickaxe with the silk touch enchantment. When mined using any other tool, it drops nothing. When mined without silk touch, it drops cobbled deepslate.

Natural generation
Deepslate makes up the majority of the solid blocks generated below y = 0 in the Overworld. Stone is gradually replaced from y = 0 to y = -7 until being completely substituted by deepslate.

When the world is generating new chunks, some deepslate becomes mineral veins, and caverns and other underground structures generate at the deepslate level.

Usage
Deepslate can be mined with a pickaxe to obtain cobbled deepslate.

Trivia

 * Deepslate is described as a sedimentary rock. Real-life slate is metamorphic.
 * Similar to grass blocks, the orientation of the texture varies depending on the coordinates.