Path of Exile · Passive tree socket
Jewel sockets
Jewel sockets are passive nodes that accept jewels; empty sockets provide no bonus by default.
How it works
The source states that jewel sockets are passives which can be filled with jewels. An empty socket grants no bonus by default. It reports 21 sockets around the tree, including basic sockets and Large Jewel Sockets that can socket cluster jewels. These counts are source-specific and are not presented as independently verified for a particular patch or league.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.