Thunder Ring
雷の指輪 [ikazuchi no yubiwa] or 'thunder ring' in Japanese.
Final Fantasy VII

Stats: nullify Lightning
Buy: 8,000 gil (Sell: ? gil)
Shop: Mideel
Obtain: from the sleeping man in the cave near Junon
Other: as 'Bolt Ring'
Crystal Chronicles
Stats: -
Obtain: Selepation Cave
Other: enables you to use Thunder without magicite
Type: Artifact
Pictlogica

Stats (lv1): strengthens Lightning-element attacks
Buy: - (sell: ? gil)
Obtain: Condor Wildlands, event quest Challenge the Magic Castle
Type: Accessory, Rarity: ★★★, Element: -
Record Keeper

Bolt Ring (VII)
Stats: ATK +10, Lightning resist (moderate), Max Level: 1
Type: Accessory, Rarity: ★★★★
Category: Equipment