The synthetic gem had been modeled on an actual kyber, which Zerpen had gone to great lengths and cost to acquire. Relatively rare, the so-called living crystals were almost exclusively the property of the Jedi, who seemed to regard the kyber as sacrosanct. Finger-sized ones powered their lightsabers, and larger ones were rumored to adorn the ornate façades of their isolated temples.
( James Luceno )
[ Catalyst: A Rogue One Novel ]
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