ダイヤの小手 / ダイヤのこて [dia no kote] or 'Diamond Gloves' in Japanese.
Final Fantasy I
Stats: DEF +8, EVA -3
Equip:
Obtain:
Description: Gloves made of diamond
Final Fantasy II
Stats: DEF +25, EVA -27%, MDEF +5%
Equip: all
Obtain:
Other: Diamond-studded gloves resistant to lightning
Final Fantasy III

Stats: DEF 15, MDEF 7, STR +3, VIT +3, weight 1
Use: FRE, ONK, WAR, THF, MNK, RNG, KNT, DRG, VIK, DRK, BLB, NIN
Buy: 10,000 gil (sell: ? gil)
Shop: Ancient Ruins, Invincible
Treasure: Sunken Cave, Temple of Time
Type: Arms
Final Fantasy IV
Stats: DEF 7, MDEF 3, EVA 0, MEVA 3
Equip: Cecil, Kain
Buy: 5,000 gil (sell: 2,500 gil)
Shop: Tomra
Other: resist Thunder
Final Fantasy IX
Stats: EVA +19, MEVA +13, nullify Water
Equip: Steiner, Freya, Beatrix
Abilities: Jelly, Ability Up
Buy: 2,000 gil (sell: 1,000 gil)
Shop: Oeilvert (Mimoza's mogshop), Desert Palace (Mojito's mogshop), Esto Gaza (equipment shop (after Desert Palace))
Obtain: dig up on the world map with the Chocograph 'Abandoned Beach'
Description: Gloves made of diamond
Type: Gauntlet
Pictlogica

Stats (lv1): STR +15, HP +15
Buy: - (sell: ? gil)
Obtain: event quest Garuda's Assault, 14th Exa Battlia (Chocobo II) reward
Type: Accessory, Rarity: ★★★★, Element: -
Category: Equipment