Lava Rock

The Lava Rock (溶岩, Yōgan) is a mysterious rock with supernatural properties introduced in the ninth part of the JoJo's Bizarre Adventure series, The JOJOLands.

It is a small sample of cooled lava which seemingly attracts anything that is of worth to its current owner. It is first seen in possession of Rohan Kishibe, who had collected two samples of the rock. However, one is destroyed by Jodio Joestar who takes the remaining sample with him.

Summary

Samples of cooled ʻAʻā lava rock which Rohan Kishibe is analyzing in his villa in Hawaii. The appearance of this particular lava rock is fairly innocuous, being dark and porous much like any ordinary cooled lava.

Rohan keeps two particular samples in a safe, next to his diamond. The lava is extremely precious and Rohan is confident that the two small samples in his possession are the only ones in existence. Jodio crushes one of the samples to blackmail Rohan, leaving only one left. Rohan secretly reveals to Jodio that he can become extremely rich if he handles the lava with care, due to it containing a hidden "mechanism". Rohan lets Jodio take the remaining sample with him.

The remaining sample has a distinctive tetrahedron shape.

Abilities and Powers

Jodio and Dragona discover that the lava gathers valuable material toward it, such as the diamond, bank notes, and Rohan's Pink Dark Boy artwork.^[3] The objects in question could be as innocuous as a $20 bank note.

Jodio infers from the fact that the samples were kept isolated in a safe that the trigger of the rock's power is either contact or close distance.^[4]

Through experimentation, Usagi, Dragona and Jodio discover that somehow, circumstances will conspire to make anything of worth that has touched the rock go back to the rock.^[5] The way objects return to the rock varies from object mysteriously slipping from a container and finding themselves near the rock, to more complex strings of events such as a bank note being used by someone else to buy food, only for Paco Laburantes to have his drink refunded by the staff because of a bug accidentally touching his drink, then Paco bringing the bank note back.

The ability to have precious items be drawn to the rock happens automatically. This means that it can happen at an inconvenient time. For instance, while Dragona was aiming to make the rock touch a few precious wristwatches to eventually make them return to the rock, one wristwatch is immediately drawn towards the rock in the middle of a sale, which catches the attention of the security guards of the shop Dragona was testing the rock in.^[6]