Ring used as a charm since ancient times.Final Fantasy IX description
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 (after returning from the Outer Continent), Alexandria (after getting Blue Narciss), Daguerreo, Treno (after returning from the Outer Continent), and the Black Mage Village (after Blue Narciss). It requires 3,000 gil, a Bone Wrist, and a Stardust Rod to make one Madain's Ring.
Madain Sari Bracelet is 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.