Barrier Block

Barriers are blocks that were added in Update 1.6.

Obtaining
Barriers can only be obtained by using Commands. They are not available in the Creative Inventory, and cannot be obtained naturally in Survival Mode. The command used is ​

Usage
When in the inventory, it looks like a red "no" sign, but if placed, it can be seen through; however, it cannot be walked through or destroyed.

Barriers are transparent to light and do not block beacons. fences, iron bars, glass panes and other similar blocks will visually not connect with barriers.

If the player holds the Barrier while in creative mode, then all the barriers will be displayed like the icon in the inventory.

Trivia

 * Redstone can pass through Barriers.