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According to netizens, Kai and Krystal's couple items are wedding bands by luxury French jewelry brand 'Cartier'. Kai's ring costs about $1,700 USD while Krystal's is a bit less but still quite expensive at $1,200 USD. The couple rings are even more expensive in Korea, costing ?2,060,000 KRW and ?1,470,000 KRW each.
Fans also claim that further "investigation" into the couple's matching rings prove that they are indeed couple items and not an endorsement product.
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