What makes Diamonds by Magnús James different?

Diamonds by Magnús James™ specializes in premium lab-grown diamonds that deliver exceptional brilliance, luxury craftsmanship, and unmatched value. All pieces are inspected, certified, and presented in signature DMJ packaging.

Are your diamonds real?

Yes. Our diamonds are 100% real, lab-grown diamonds with the exact same chemical, optical, and physical properties as mined diamonds. They test as real diamonds and follow standard GIA-equivalent grading criteria.

Do your diamonds come with certification?

Yes. All major Diamonds by Magnús James pieces include a certified grading report and a DMJ Certificate of Authenticity.

What metals do you use?

We use only solid 14k gold in white, yellow, and rose. We do not use plated, filled, or vermeil metals.

What is your return policy?

We offer 30-day free returns on unworn items in original condition. Custom, engraved, or made-to-order pieces are final sale.

Do you offer financing?

Yes. Customers can use Shop Pay Installments to split purchases into flexible payments at checkout.

How long does shipping take?

In-stock jewelry ships within 1–2 business days. Custom or special-order pieces typically ship within 5–10 business days depending on production time.

Do you offer warranties?

Yes. All Diamonds by Magnús James jewelry includes a lifetime manufacturing warranty that covers craftsmanship defects.

Can I custom-design a piece?

Yes. We offer custom design consultations for engagement rings, pendants, earrings, and other bespoke jewelry pieces.

Signature & Custom Designs

Discover exclusive Diamonds by Magnús James™ Signature Designs along with fully custom lab-grown diamond creations crafted just for you. Our bespoke design service allows you to choose your diamond, style, metal, and details—bringing your vision to life with IGI-certified brilliance, D-E color, and VVS-level clarity. Whether you’re personalizing a solitaire, upgrading a classic, or creating a one-of-a-kind piece, we offer ethical, modern craftsmanship. Your dream design starts here.