Ring used as a charm since ancient times.
Madain's Ring is an add-on that provides +2 Spirit, +2 Magic Defense, absorbs Ice-elemental damage, and teaches the abilities Body Temp, Guardian Mog, and Chemist. It can be dug from the mining minigame in Fossil Roo (doing so earns an achievement/trophy in the latest versions), found by using a Dead Pepper at the mountain crack on northeastern part of the Forgotten Continent while on Choco, bought at the Treno Auction House, and synthesized at Lindblum (discs 3/4), Alexandria (after getting Blue Narciss), Daguerreo, Treno discs 3/4), and the Black Mage Village (discs 3/4). It requires 3,000 gil, a Bone Wrist, and a Stardust Rod to make one Madain's Ring.Garnet's 5-star exclusive armor. It grants INT BRV+110 and DEF+84
Mada'in Saleh is an ancient city located in the north of Saudi Arabia said to have been cursed and destroyed by a cataclysmic earthquake as a punishment by Allah for the Thamudis' idol worship.