Jade Ring
Increases critical strike power by 10%.
Overview
The Jade Ring is a ring that becomes available for purchase from the Adventurer's Guild after completing the Deeper in the Mine Quest. It can also be obtained from Fishing Treasure Chests after reaching Fishing level 2, and it may appear in Mystery Boxes.
When equipped, the Jade Ring increases critical strike power by 10%. Equipping a second Jade Ring grants an additional 10% critical strike power, for a total bonus of 20%.
It can also be used in dyeing as a green dye at the dye pots in 
Official description
Increases critical strike power by 10%.