As it's name suggests the Ring of Treasure will help you to increase your wealth as it's unique effect grants you a bonus of 10% gold loot on any monster you kill.
You will be able to craft it on the 40th level of Smithing as long as you have all the required components.
Crafted with
•2x 
Gold Bars
•1x 
Arosite
•1x 
Sapphire
•1x 
Ruby