Diamond Nexus has a $100 off promo code at the top of the page, the $100 off voucher at the top of this page, which is best if you have a full price item that matches the selected products for the code. That code is the lead offer and is useful when you want an immediate fixed saving on eligible, non custom or non discounted pieces. If you are shopping sale items the Up to 75% Off Sale Products is often the bigger saver for marked down pieces.
Small purchases under $100 to $150. If your cart is under or just above $100, the $100 off voucher at the top of this page can still apply if the item is eligible, but watch exclusions: the code does not apply to already discounted items or custom pieces. For example, on a $120 full price ring the $100 off voucher takes $100 off, leaving $20 to pay and you also qualify for free shipping because orders over $100 get free shipping.
Mid size purchases $300 to $1,000. Use the $100 off voucher for a broad, guaranteed saving on eligible full price items. The $50 off storewide code is a smaller fixed saving and is only preferable when the $100 code does not apply to the item you want. If the item is in the sale section, the Up to 75% Off Sale Products will usually beat either code for that particular piece because the percentage reduction applies to marked price.
High value purchases and engagement sets. If you are buying an engagement ring plus a wedding band, the Buy an Engagement Ring Get 20% Off Any Wedding Band deal is aimed at that scenario. For example, if an engagement ring is $2,000 and a wedding band is $500, the band becomes $400 after 20% off, so total is $2,400. If the same two items were both full price and eligible for the $100 off voucher, the $100 voucher would give $2,400 total minus $100 = $2,400, so the engagement set deal usually gives the larger band saving because the voucher cannot apply to sale items and selected exclusions may block it. Use the engagement ring plus band deal when you need the band discount specifically.
Buying marked down or gift picks. For marked sale items or the Gift Under $1200 selection, check whether the piece is in the sale. Sale prices up to 75% or up to 50% off fine jewelry cannot be combined with other offers in many cases, and several deals state they cannot be used with any other offers.
Our records show 12 offers listed for Diamond Nexus in the 12 months to October 2026, with the biggest percentage deal in that time being up to 75% off (October 2026). Our team ran 2 checkout tests across 2 offers in the 12 months to October 2026.
When choosing, pick the option that leaves the lower total: apply the $100 off voucher at checkout if your full price items are eligible, use the $50 code only if the $100 code does not apply, take the engagement ring plus 20% off band deal when you buy both pieces, and choose sale prices when a specific item is on sale. Remember several sale and deal lines explicitly forbid combining with other offers, and the fine jewelry sale states it cannot be used with any other offers.
