Hardened Glass

Hardened glass is a type of glass that can be crafted in Education Edition.

Obtaining
Hardened Glass will drop itself only if it is broken with a tool enchanted with silk touch; otherwise it will drop nothing.

Usage
Most blocks that require placement on a solid block cannot be placed on hardened glass or hardened stained glass. The only exceptions are torches and redstone torches, which can be placed on top of glass, but not attached to their sides.

Hardened glass blocks adjacent to other hardened glass blocks are invisible when viewed through the glass. But not with the normal glass.