Froglight

A froglight is a decorative “organic substance” that can be obtained if a frog attempts to digest a tiny magma cube.

Breaking
Froglights drop as an item when broken with any tool or by hand.

Obtaining
A tiny magma cube drops a froglight when it is killed by a frog. There are three colors of froglight that drop depending on what type of frog kills the magma cube:

Usage
Froglights have a smooth texture and are used as light sources. They emit light level 15, the highest level possible for a light-emitting block.

Trivia

 * Froglights “are an organic substance since they’re organisms that have been digested and then spat out by the frog,” revealing that Frogs don’t actually eat Magma Cubes, and they only try to do so before spitting it out, producing a froglight.
 * One name for the pearlescent froglight during development was the "blanc froglight".