What's going on in that photo? Blessing the weapons? Haha, never thought I'd see that today.
As the traditional RPG games that let you equip one charm or piece of jewelry for an ability/enchantment. It would just be for fun if anyone wants to look for pictures and post some sci-fi ability it would give you and inspire a modder to make a mod to fit the X-COM setting.
Here some photos from Google and I don't know anything about the show most of these pics are from:
(https://www.roswelloracle.com/Archives/amplifier.jpg)
Can block Psi-Attacks. Limited to weaker attacks.
(https://www.neologicaltech.com/v/vspfiles/images/info_artifact.jpg)
Remote Control to hack a Cyberdisc (One time use).
(https://www.roswelloracle.com/Archives/healingstone5.jpg)
Auto-heal Crystal
(https://www.roswelloracle.com/Archives/granolithcrystal.jpg)
Mysterious Crystal (Key that opens the janitor's closet in Cydonia)
(https://www.roswelloracle.com/Archives/swirlnecklace.jpg)
Stat boost, I suppose.
(https://www.roswelloracle.com/Archives/triangle.jpg)
Cloaking Triangle that cloaks you if no lifeform within 10 spaces is around you.
(https://www.roswelloracle.com/Archives/destinybook.jpg)
Alien Bible for research and lore discovery.
(https://chickgeek.org/wp-content/uploads/2013/08/kirk.jpg)