Small Green Gemstone

 is one of the Socket Items in ELEX. These cannot be crafted, only found in the environment. There are total of 16.

Locations

 * One can be found in the room of the Patron near to the Valley of the Damned Teleporter.
 * One can be found on a table in the sleeping quarters of the Clerics stronghold inside the Domed City.
 * One can be found inside a locked safe by the serial killer's skeleton with a Goodbye Letter in a house in Xacor.
 * One can be found on a table inside the Reavers hideout by the Old Windfarm teleporter.
 * One can be found on a table inside one of the shelters on Berserker Island.
 * One can be found in a locker inside a small brick ruin northeast of the Lava Lake teleporter.
 * One can be found in the heretic camp (if you joined the clerics) where there is also an energy shield in East Ignadon
 * One can be found in Egil / Galar house in South Edan

Videos
https://www.youtube.com/watch?v=lQOiYT_JVvQ


 * 1) Thanks to Kuposaur