Liminal Recondite Device

Marbles are rare and mysterious Discoveries found around the Planets, usually underground inside of caves. They can be lifted and attached to two slots like other objects, but they cannot be researched. They are perfectly round and also emit light; making them relatively easy to spot, and giving them potential as a light source. Aside from this, they currently serve no gameplay purpose and seem to be nothing but an easter egg.

Currently, there are three different types of Marble.

Zebra Ball
This is the most commonly found marble out of the three, and the first to be added. The zebra ball has strips of black and white curled around the sphere.

Chess Ball
Patch 119 introduced two other balls, which have a chance of replacing Zebra balls found in older patches. This one has a checkerboard, or "chess" pattern, and as such has been named the Chess Ball. Aside from it's different pattern, it functions exactly like the Zebra ball

Spotted "Dalmatian" Ball
The other new ball introduced in Patch 119, this one is white covered in black round spots of varying size. It is called the Spotted ball, but is also know by the name the "Dalmatian" ball. Like the other balls, this ball functions identically to the other two aside from it's pattern.

Trivia

 * According to developers, the objects were originally used for testing physics and light systems, but were accidentally left in the game.