Mytag crystals were synthetic crystals used in ancient communication and scanning technology. Xim the Despot had stockpiled these in his ship, Queen of Ranroon. This hidden collection of material contributed to the legend of Xim's lost treasure. The crystals were used in The Ark of Baron Auletphant, which used several different varieties, such as Rose Mytag crystals and Azure Mytag crystals. The crystals probably became outdated with the invention of the hologram.
- Star Wars: The Old Republic: Rise of the Hutt Cartel
- Han Solo and the Lost Legacy (First appearance)
- A Guide to the Star Wars Universe
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- The Essential Guide to Warfare