Glowstone

Glowstone was a part of 'temporal Glowstone stabilisers', a component of the TARDIS. (NOTVALID: Doctor Who Minecraft)

Behind the scenes
Glowstone was a block in Minecraft that could be found in the Nether, a hell-inspired dimension. When broken without use of Silk Touch, it would drop 'Glowstone Dust'. Glowstone, with Redstone Dust directly above, below, left, and right of it in a 3 x3 crafting grid would create a 'Redstone Lamp', which was used in various structures in NOTVALID: Doctor Who Minecraft, such as the Dalek Fleet, and the Cyberman. Additionally, Glowstone itself was used in the Red Dalek seen in the rollercoaster ride by Christel Dee, inside & in front of 'Stampys hot buns', and as part of a red planet seen in a transmission from Ben.