The Deal Spend $500 in one or more transactions at Blue Nile & get $100 back with an Amex Offer. Key Terms Expires October 31, 2022. Valid in-store and online. Valid only on US website. Excludes jewelry insurance. Offer is non-transferable. Valid only on purchases made in US dollars. Tips & Ideas It looks like you should be able to buy … [Read more...] about (EXPIRED) Blue Nile Amex Offer: Spend $500 & Get $100 Back (Buy eGift Card)