Jewel of Life
The Jewel of Life (often referered as life or JOL), is used to enhance an item's option.
It has the ability to enhance an upgradeable item 7 times.
This jewel canno't be compressed using Lahap.
The item is used the same way as bless and soul
after applying the jewel on the item an option will be added to the item, up to 7 times (+28 in armor sets and weapons).
How to Find the Jewel of Life
This item can be found by hunting monsters.
In InfinityMU the administration has put this item in many NPC's so you can buy it with zen.
It isn't required to hunt it.
Places to buy the Jewel of Life
Lorencia bar maid Lost tower NPC Noria NPC
The list goes on as there are many NPC's who offer this jewel.