dec: 89 hex: 59 bin: 1011001
Glowstone only occurs naturally in the Nether, where it generates in coral-like clusters on the undersides of Netherrack. It can be difficult to harvest there, due to high ceilings, sheer cliffs, abundance of lava, and dangerous mobs. Pillaring up to dense Glowstone clusters is often useful, provided there are no Ghasts in the vicinity. Glowstone sometimes appears beneath low ceilings, which makes mining significantly easier.
As a light source
Glowstone blocks emit a light level of 15, the brightest possible light level in the game. They are equal to Sea Lanterns, Jack o'Lanterns, Redstone Lamps and beacons with the light they emit, and are brighter than torches (which emit a light level of 14).
Note that, however, you cannot place anything on Glowstone except for blocks and redstone.
In redstone circuits
When placing Redstone on a Glowstone block, being a transparent block, signals can pass from one block to another diagonally, with Glowstone "blocking but not blocking" it. Redstone wire, even though it may appear to connect up the side of a Glowstone block and to the wire portion on top, will not send a Redstone signal down the Glowstone block. This makes Glowstone effective for vertical diodes, logic gate designs and space-efficient instant vertical Redstone.
Note that upside-down slabs can be used for the same purpose, and are easier to obtain.
As a crafting ingredient
|1.2.0||Glowstone was added.|
|Crafting recipe was 3×3 glowstone dust.|
|Drop rate of glowstone dust was 1.|
|Material type began as "glass".|
|1.6.6||Crafting recipe is now 2×2 glowstone dust.|
|Drop rate of glowstone dust is now increased to 2–4.|
|Material type was changed to "stone":|
|1.7.3||Harvesting glowstone required an iron pickaxe or higher.|
|1.0.0||Beta 1.9-pre5||Glowstone was given a different texture.|
|1.0.0-RC1||Material type is now changed once again to "glass".|
|1.2.1||Redstone can now be placed on glowstone.
|Glowstone is used to craft Redstone Lamps.|
|1.3||Glowstone can now be purchased from villagers.|
|1.5||13w02a||In texture packs, Glowstone uses /textures/blocks/lightgem.png|
|1.7||Glowstone can no longer be used to see through blocks.|
|Pocket Edition Alpha|
|0.5.0||Glowstone was added. Its ingredients are spawned next to active Nether Reactors.|
|0.9.0||build 1||Smooth lighting was removed from glowstone.|
|TU1||Glowstone was added.|
|0.1.1||Glowstone was added.|
- Since glowstone blocks become block entities when moved by pistons, this momentarily stops them from giving off light.
- Rarely, glowstone can be found touching the ground if the ceiling it was generated on was extremely low (2-3 blocks of clearance).
- When glowstone is placed 9 or more blocks above ground level (out of its lighting range), glowstone will actually cast a shadow, despite it being a light-emitting block.
- When you break glowstone, it has the same sound effect as breaking glass.
- Before the name was officially confirmed, glowstone was also called lightstone, brimstone and australium.