You can check out game guide on 12SKY M GLOBAL

● Overview
ㆍ Only equipment of 2nd God Tier or higher can add sockets to equip Jewels.
ㆍ You can add sockets through the Jewel NPC, and only Jewels of the designated color can be equipped.
ㆍ Jewels provide additional stats when equipped, after Gems are obtained and processed into Jewels through the Jewel NPC.
● Add sockets
ㆍ Available from 2nd-tier God equipment and above.
ㆍ The maximum number of sockets varies depending on the equipment tier.
ㆍ Add Sockets cannot be performed while jewels are equipped.
● Socket scroll

ㆍ Each attempt to Add Sockets consumes 1 Socket Scroll.
● How to Add Sockets

ㆍ Select the equipment via the [Jewel NPC].

ㆍ Inactive sockets appear as locked, allowing you to check the maximum socket capacity.

ㆍ Use a Socket Scroll to add sockets.

ㆍ Check the socket result and activation status.
※ Adding Sockets cannot be performed while jewels are equipped. Remove them first.
● Jewel Crafting
ㆍ Clear Archdemon Excision to obtain different Jewel Boxes based on difficulty.
ㆍ Crafting Stones can be purchased from the Gold Shop.
ㆍ Crafted jewels provide additional stats when equipped.
● How to Craft Jewels

ㆍ Select gems via the [Jewel NPC].

ㆍ Up to 100 gems can be crafted at once.

ㆍ Use Crafting Stones to craft the selected gems.

ㆍ Crafting results in either success or destruction, based on probability.
※ Crafted jewels cannot be re-crafted.
※ Crafted jewels can be restored into [UT] Gem stones through Dismantle (future update).
● Crafting Stones

ㆍ Material used to craft gems into jewels.
ㆍ Crafting results in either success (Rare, Unique, or God tier) or destruction based on specific probabilities, and the outcome can be verified immediately.
ㆍ On failure, the gem is destroyed.
● Jewel Effects
※ Additional jewel types will be added through future updates.
● How to Equip Jewels

ㆍ Select the equipment via the [Jewel NPC], then choose an available socket and compatible jewel.

ㆍ Equip the jewel.

ㆍ Verify the equipped jewel.
● How to Remove Jewels

ㆍ Select the equipment via the [Jewel NPC].

ㆍ Extract the equipped jewel.

ㆍ Extracted jewels are moved to the inventory and re-equipped.