Lasting Brilliance runs an unusually thin coupon operation: SimplyCodes tracking shows the brand typically carries only 0 to 1 active codes at any moment, with a 90-day average discount holding steady at 10%. Historical data over the past two years reveals a predictable rhythm to those codes: flat $10-off offers appeared from October 2025 through January 2026, while 10%-off storewide codes ran from May 2026 through August 2026. For shoppers eyeing fine jewelry or lab-grown diamonds, the practical takeaway is patience over stacking, and knowing that returns carry a $10 restocking fee that can quietly erase a discount.
Time Purchases to the $10-Off or 10%-Off Storewide Code
The best available discount at Lasting Brilliance is a flat $10 off or 10% off storewide, and SimplyCodes data confirms a 10% off offer is currently active alongside a 90-day average discount of exactly 10%. This is the ceiling, not a floor to negotiate up from. Because the brand rarely runs more than a single code at once, deep promotional stacking is not part of how Lasting Brilliance operates.
SimplyCodes historical tracking shows these single storewide codes cycle by season: a flat $10-off code ran from October 2025 into January 2026, and a 10%-off storewide code held from May 2026 through August 2026. Certain stretches, including February through April 2026, carried no active code at all.
If no code is live when you check, waiting a few weeks is a reasonable play, since Lasting Brilliance has historically rotated these storewide codes back into circulation. Verifying the active offer on SimplyCodes before committing ensures you capture the baseline 10% or $10 rather than paying full price during one of the brand's coverage gaps.
Competitors Like Brilliant Earth and Ritani Widen Lab-Grown Diamond Options
Brilliant Earth and Ritani overlap directly with Lasting Brilliance's fine-jewelry, bridal, and lab-grown diamond selection, alongside The Clear Cut and VRAI, giving shoppers real alternatives when a specific design isn't the deciding factor. SimplyCodes tracks 1,935 active competitor codes across this jewelry category, a far larger pool than the 0 to 1 codes Lasting Brilliance itself carries.
Because a Lasting Brilliance code is both rare and capped at 10% or $10, the math often favors comparison shopping for a comparable lab-grown SKU. A sitewide promotion at Ritani or Brilliant Earth can outperform the fixed baseline available at Lasting Brilliance on a similar stone or setting. When you are set on a particular Lasting Brilliance piece, the brand's own storewide code remains the target; when you are shopping the category broadly, the competitor pool is where the deeper discounts tend to live.
Clear the Free-Shipping Threshold Before Adding a Return-Prone Piece
Lasting Brilliance deducts a $10 return-shipping and restocking fee from every eligible refund, which means a return can wipe out the entire value of the brand's standard 10%-off or $10-off code. According to Lasting Brilliance's official return policy, the return and exchange window runs 30 days and applies only to unused, non-flower products in their original sealed packaging.
That same policy strictly excludes final-sale items, surprise boxes, and made-to-order pieces from returns entirely. For jewelry that is personalized or built to order, there is no refund path, so those purchases only make sense when you are fully committed to keeping them.
On shipping, Lasting Brilliance's official FAQ states that standard shipping is free for continental U.S. orders above an unspecified minimum. Checking your cart against that threshold at checkout keeps the $10-off or 10% savings intact rather than surrendering it to a shipping charge, and keeping any returnable item unused and sealed protects you from the $10 restocking deduction on the back end.
