Stained Glass
Local game data
Black Stained Glass
Breaking
Stained glass drops itself only if it is broken with a tool enchanted with Silk Touch. Otherwise, it drops nothing. Stained glass does not have an assigned tool; it is mined at the same speed regardless of what tool is used.
Natural generation
Magenta stained glass blocks naturally generate as windows in end cities and end ships.
Brown stained glass can generate in trail ruins. Black, light gray, and white stained glass can generate inside trial chambers.
Usage
Stained glass blocks adjacent to other glass blocks are invisible when viewed through glass that is identical in color. Mobs cannot normally spawn on stained glass blocks. An exception to this is zombie reinforcements, which can spawn on stained glass blocks (but not stained glass panes). Stained glass blocks cannot be seen through by mobs, as they treat them as completely opaque. Mobs may look at players through stained glass, but this is purely visual. Redstone dust and components can be placed on stained glass, but cannot power stained glass. Stained glass can't cut vertical redstone. Vertical redstone can be placed on stained glass. , it transmits redstone signals up, not down. Otherwise, stained glass in redstone circuits is functionally the same as an upside-down slab.
Trivia
Prior to the addition of stained glass to the game, there was a similar block named tinted glass added to the hoax version Java Edition 2.0. The texture for this tinted glass block was used for the implementation of stained glass in 13w41a before it was replaced with a smoother/transparent texture in 13w42a. The iteration of tinted glass from Java Edition 2.0 shares its name with the tinted glass block added in 1.17.
Screenshots
13w41a Banner.png|The first image of stained glass released by Mojang Studios. Behind the glass is a cat and Grum. Minecraft Stained Glass.png|The original look of the stained glass blocks. View of all Stained Glass.png|Stained glass as of 1.21.8. Red Sandstone Coloured Beacon.png|Stained glass changing the beacon's color. Red Sand Red Glass.png|Unimplemented smelting recipe for red glass.