10% Off Your Order
Up to 25% Off Promotions & Offers
15% Off Mother's Day Gifts
Enter this coupon code at checkout and get 15% discount on Mother's Day gifts.
Expires today
25% Off Sitewide
25% Off Lab-Grown Diamonds
20% Off Select Tennis Necklaces
15% Off When You Refer a Friend
Used 113 Times
10% Off Your First Order With Email Sign Up
Shop New Arrivals from $150
Shop Now, Pay Later With Klarna
Free Shipping on All Orders
Shop Accessories from $15
30-Day Return Policy
Shop Best Sellers from $300
Top Lightbox Jewelry Coupons and Deals for April 2025
Coupon | Discount Type | Last Used |
---|---|---|
25% Off Lab-Grown Diamonds | Deal | Apr 29, 2025 |
10% Off Your Order | Coupon Code | Apr 29, 2025 |
Up to 25% Off Promotions & Offers | Deal | Apr 29, 2025 |
25% Off Sitewide | Deal | Apr 29, 2025 |
20% Off Select Tennis Necklaces | Deal | Apr 29, 2025 |
Recently Expired Lightbox Jewelry Coupons
Up to 65% Off Select Styles
Up to 65% Off Promotions and Offers
20% Off Earrings
Shop Valentine's Day Gifts from $250
Free Shipping on All Orders
Best Lightbox Jewelry Sales Available Now
Add beautiful, sparkling lab-created diamonds to your jewelry collection with Lightbox Jewelry. Looking for the perfect affordable gift for a special someone? Shop the Under $500 Collection for earrings, necklaces, and more gorgeous pieces that you can't find elsewhere.
If lab-grown diamonds aren’t your thing, check out our guide on Diamond-Buying Hacks That’ll Save You Money.
How to Save at Lightbox Jewelry
Save 10% With Email Sign-Up
Sign up to receive Lightbox Jewelry emails and get an instant 10% off promo code delivered to your inbox to use on a future order. Plus, stay in the loop about new arrivals, the latest jewelry discounts, and more!
Enjoy Hassle-Free Returns
Take up to 30 days to decide if your jewelry is right for you. If you need to initiate a return, use the Lightbox Jewelry Returns Center to let the company know what's wrong and to receive instructions about the next steps.
Buy Now, Pay Later
At checkout, choose Affirm and get four interest-free installments to help you pay the full price over time rather than all at once.
Lightbox Jewelry - Frequently Asked Questions
Are Lightbox diamonds real diamonds?
Lightbox's diamonds are lab-grown diamonds that exhibit the same chemical makeup of real diamonds. However, because they're grown in a lab rather than naturally, they are not considered real diamonds. Still, they look and behave much like a real diamond does.
How does Lightbox Jewelry make its lab-grown diamonds?
Lightbox Jewelry uses innovative technology to create its lab-grown diamonds that look like natural diamonds. Using lab-created diamond "seeds," Lightbox uses a plasma reactor to grow diamonds much quicker than they'd grow naturally in the environment.
What are the differences between Lightbox's carats?
Lightbox offers varying degrees of diamond quality, which it categorizes by Lightbox Finest, Lightbox Finest Loose, Lightbox, and Lightbox Loose — with Lightbox Finest being the best quality and Lightbox Loose being the most affordable. Carats vary in weight from 1/10th of a carat to 2.10 carats.
How should I care for my Lightbox Jewelry diamonds?
Lightbox Jewelry recommends storing your diamonds and jewelry in cushioned containers to avoid scratches and damage. Also, clean lab-grown diamonds regularly with a soft cloth and a mild dish soap diluted with water.