Multiple realities
(covers information from several alternate timelines)
Uhura wears her vokaya necklace
An amulet is a type of jewelry thought to provide spiritual protection or luck.
In an alternate reality, Spock gifted a Vulcan amulet made of vokaya, once owned by his Human mother, Amanda Grayson, to Nyota Uhura. (Star Trek Beyond)
In 2370, the former wife of the Albino died on Dayos IV, but not before dispatching an amulet to Kang disclosing the location of the Albino's sanctuary on Secarus IV in the Secarus system. (DS9: "Blood Oath")