Either アミュレット [amulet] or お守り [omamori] ('amulet') in Japanese.
Final Fantasy VI
Stats: -
Equip: all
Obtain: ?
Description: Protective charm worn around the neck. Prevents poison, darkness and zombie.
Other: アミュレット in Japanese
Final Fantasy VII

Stats: LCK +10
Buy: 10,000 gil (Sell: ? gil)
Shop: Mideel
Other: お守り in Japanese
Other: the text on the amulet reads 御守 [omamori], which is also the name of this item in Japanese (written in another way), and is what is usually written on amulets of this type in Japan
Crystal Bearers
Stats: DEF 1
Ability: -
Type: Amulet / Amulet family
Buy: 800 gil / Selkie Train otw to Red Leaf Station (until you reach Rivelgauge Monastery)
Craft: 80 gil, Nut, Moogle Doll, Cool Specs
Description: ?
Pictlogica

Amulet
Stats (lv1): INT +10%
Buy: - (sell: ? gil)
Obtain: Spira Central Highlands
Type: Accessory, Rarity: ★★, Element: -
Other: アミュレット in Japanese

Charm
Stats (lv1): LCK +13%
Buy: - (sell: ? gil)
Obtain: West Figaro Mountains, event quest Monster Lotto
Type: Accessory, Rarity: ★★★, Element: -
Other: お守り in Japanese
Record Keeper

Amulet (VI)
Stats: MAG +20, Max Level: 1
Type: Accessory, Rarity: ★★★★
Other: アミュレット in Japanese
Category: Equipment