These are typically blobs (clusters) of glowstone that can be among the hardest natural materials to harvest that don't require digging. They form in coral-like structures on the underside of hanging Netherrack, so they are often found on the ceilings of the Nether, where they provide light along with the ever-present lava.
Glowstone blobs consist of one block-wide tendrils extending from a central clump. Being found in caves, hanging above an ocean of lava and even within nether fortresses, they are the main source of charges of glowstone for respawn anchors. They can be found in every nether biome and structure except for Bastions and Ruined Portals.
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|Java Edition Alpha|
|v1.2.0||preview||Added glowstone blobs.|
|Pocket Edition Alpha|
|v0.12.1||build 1||Added the Nether, along with glowstone blobs.|
A naturally generated glowstone cluster in basalt deltas.
- "mcdata/processed/reports/registries/worldgen/feature/data.json" by Arcensoth – github, July 24th, 2020.