Runestone Pedestal

Runestone pedestals which are part of an unconquered shrine cannot be destroyed in survival mode
Runestone pedestals are blocks with similar properties to stone, which are available in 7 elemental varieties and have a glowing pattern on their side faces. They serve as decorative blocks and building materials, and hold the tile entity responsible for shrine mechanics.
Obtaining
Runestone pedestals can be crafted from 5 stone and 4 magic crystals of the corresponding element, or it can be collected from naturally-generated shrines once conquered. It is also available in the wizardry tab of the creative mode inventory and via the /give command.

Appearance
Runestone pedestal blocks appear to be made of colored stone with roughly chiseled edges. The four side faces have a T-shaped pattern, which glows in the dark - though the block itself does not emit any actual light. The colors of the stone and pattern reflect the runestone pedestal's element.
Usage
Runestone pedestals have no uses in survival mode besides construction and decoration. However, using commands it is possible to place a runestone pedestal which will behave as if it were part of a naturally-generated shrine, allowing shrines to be built artificially.