***MAY CONTAIN SPOILERS***
The following is a list of rings that are obtained from fallen enemies or found in hidden chests and how exactly to obtain them. These are rings you cannot make, they are only found.
Adamantis Ring: (Water Lv1) (Bio Killer Lv1) (MP Absorb Lv1)
-Give a Pipot 20 seeds
Aneira Ring: (HP Absorb Lv3) (MP Absorb Lv3) (Magic Delay Lv3)
-Find all of Sed's crewmates and return to the hideout (Pirate Fortress)
Angel Ring: (Earth Lv2) (Kelo-Killer Lv2) (HP Absorb Lv2)
-Loot from keystone in ancient fiend battle (The Great Ancient Ruins-ToS)
Apocalypse Ring: (Earth Lv2) (Magic Killer Lv2) (Toxin Effect Lv2)
-Complete "Sunken in the Sea of Baus" treasure hunt (Undersea)
Circular Dance Ring: (GC Down Lv2) (Paralysis Effect Lv2)
-The platform (Gohtza Station)
Dark Crystal Ring: (Wind Lv2) (Magic Killer Lv1) (Terror Effect Lv1)
-Complete "Tosca Treasure Hunt" (Tosca)
Demon King Ring: (Fire Lv2) (Spirit Killer Lv2) (MP Absorb Lv2)
-Complete "King Gongora's Secret" Treasure Hunt (Gongora's MEL)
Demon Warrior Ring: (Beast Killer Lv1) (Machine Killer Lv1) (Magic Killer Lv1)
-Maze of Gloom (Requires Mack in party) (Crimson Forest)
Durandal Ring: (Damage Up Lv3+) (Critical Up Lv3+) (8x GC Damage+)
-Give Orichalcum to Blacksmith (Ipsiilon Mountains-Mining Site)
Gaia Ring: (Damage Up Lv2) (Critical Up Lv2) (2x GC Damage)
-Complete "Hidden Treasure in Station Square" (Uhra)
Gravity Ring: (HP Absorb Lv3) (MP Absorb Lv3) (Rare Item Robber Lv3)
-Defeat the Cave Worm (The Forgotten Cave)
Ignis Ring: (Damage Up Lv3+) (HP Absorb Lv3+) (Rare Item Robber Lv3+)
-Give Orichalcum to Blacksmith (Ipsiilon Mountains-Mining Site)
Innocence Ring: (Fire Lv2) (Machine Killer Lv1) (Seal Effect Lv1)
-Gambler's Hideout (Gohtza-Casino)
King Ring: (Critical Up Lv3) (Instant Death Effect) (8x GC Damage)
-Defeat Golden Knight (Uhra-Amphitheater of the Sky)
Lotus Ring: (Damage Up Lv2) (Machine Killer Lv2)
-(Experimental Staff-Upper Division)
Lucent Dragon Ring: (HP Absorb Lv2) (MP Absorb Lv2) (Critical Up Lv2)
-Complete "Art Piece From the Ruin" Treasure hunt (The Great Ancient Ruins)
Master Ring: (Toxin Effect Lv3) (Petrify Effect Lv3) (Paralysis Effect Lv3)
-Break Royal Seal (The Black Cave-Helltrap)
Phoenix Ring: (HP Absorb Lv3) (MP Absorb Lv3) (Damage Up Lv3)
-Complete "What the Cursed Mask Guards" Treasure hunt (Temple of Enlightenment-Altar of Truth)
Royal Knight Ring: (GC Down Lv2) (Machine Killer Lv2) (Magic Killer Lv2)
-Break Royal Seal in Uhra back alley
Sacred Ring: (Wind Lv2) (Machine Killer Lv2) (Sleep Effect Lv2)
-Return Laploss' claw to the shopkeep (Gohtzan Refugee Camp)
Siderite Ring: (Damage Up Lv3) (Critical Up Lv3) (8x GC Damage)
-Earn 60 Stars in Backyard Competition (Gohtza-Backyard)
Snake Ring: (Poison Effect Lv1) (Darkness Effect Lv1)
-(Experimental Staff-Power Division)
Solomon Ring: (Water Lv2) (Bio Killer Lv2) (Petrify Lv2)
-Sunken Town Treasure hunt (Undersea)
Spartan Ring: (Beast Killer Lv2) (Machine Killer Lv2) (Bio Killer Lv2)
-Turn in Riordan the Smuggler (City of Saman)
Spire Ring: (Water Lv2) (Magic Killer Lv2) (Poison Effect Lv2)
-Complete "An Item at the Hot Spring" Treasure hunt (Gohtzan Refugee Camp)