This is a large Artusian crystal located within the research facility situated on Kejim
Here are some Artusian crystals.
Artusian crystals were a material that was discovered and extracted from Artus Prime.
Due to their potentially hazardous nature, these crystals were subject to New Republic Ordinance 20098-B, which mandated the reporting of their collection and processing activities.
The Republic was notified of the discovery of a significant deposit of these crystals by the colony administrator; the colony then came under the control of the Empire Reborn, and the administrator subsequently failed to provide the required weekly transmissions with further details, as stipulated by the ordinance.
They served as the key ingredient in Admiral Galak Fyyar's scheme to imbue Human individuals with limited Force-sensitivity with Force powers. While early attempts at Kejim Outpost proved unsuccessful, the objective was ultimately achieved after the crystals were imbued with the power emanating from the Valley of the Jedi. A small Artusian crystal played a crucial role in the construction of Shadowtrooper armor.
It was noted that Artusian crystals bore a strong resemblance to "those found in a Jedi's lightsaber." Nevertheless, the precise characteristics of Artusian crystals remained unclear, especially considering the diverse range of crystals utilized in lightsabers.
Following the demise of Desann, Lannik Racto was in possession of at least three of these crystals; presumably, they were confiscated along with the other Sith artifacts after Jaden Korr captured him.