A Nak'tra crystal. On the Wookiee homeworld of Kashyyyk, within the Myyydril Caverns, a specific type of crystal existed: the Nak'tra crystal. The Myyydril tribe cultivated crystal gardens, harvesting these crystals for use in their crystal rifles and other armaments. Furthermore, Nak'tra crystals were suitable for the construction of a Jedi lightsaber. The term "Nak'tra" itself, in the Myyydril language, translated to "deadly," reflecting their purpose.
These crystals held significant value as a weapon material, commanding a high price in credits. Occasionally, they were discovered within the digestive systems of deceased Urnsor'is.
The Nak'tra crystals made an appearance in the Star Wars Galaxies video game. This game was a massively multiplayer online roleplaying game created by Sony Online Entertainment and released by LucasArts. The game was shut down on December 15, 2011.