The Diamond Spinner (ダイヤモンドスピナー Daiyamondosupinaa) is Cure Diamond's purification weapon.
Unlike some weapons, Cure Diamond's Diamond Spinner comes naturally with her fighting ability so she never had to earn it. When Cure Diamond earns her Pearl Card, she swipes the card down the slot in her Diamond Spinner and upgrades it. Pearl Mode is unlocked due to this upgrade, so to activate this mode Umeki swipes the Pearl Card down the slot. One thing past weapons can't do is that Umeki can summon it even when she's not transformed.
The Diamond Spinner looks like the Flower Tacts, but instead of the cylinder thing in the middle the Diamond Spinner has a white wheel with pink circles around a slot. The rest of the weapon is silver. On the tip there is a diamond.