At AJO, diamond selection is guided by three core quality parameters — clarity, color, and fluorescence — ensuring that every stone delivers exceptional brilliance and structural integrity.

We exclusively use lab-grown diamonds in VS2, VS1, and VVS clarity grades — levels where inclusions are minimal and not visible to the naked eye.
We do not use SI1 or SI2 diamonds, which often contain visible inclusions, structural issues, or internal stress points that affect both beauty and durability.

Our diamonds fall strictly within the D–F color range, representing the most desirable colorless category. This ensures maximum light return, fire, and brilliance — especially important in solitaire and multi-stone settings.

We require zero fluorescence in all diamonds used in our jewelry. By using diamonds with no fluorescence, we ensure a cleaner, brighter appearance in all lighting conditions.

Beyond our three primary criteria, we accept only stones with ideal or near-ideal craftsmanship parameters, ensuring perfect light performance: Cut: Excellent / Ideal, Symmetry: Excellent or Very Good, Polish: Excellent or Very Good.

Combined with our strict clarity, color, and fluorescence requirements, these standards guarantee that every AJO diamond displays outstanding fire, scintillation, and precision.

All diamonds 1.00 ct and above come with independent GIA or IGI certification.
Additionally, our Antwerp diamond division — a certified AWDC (Antwerp World Diamond Centre) member within our group — performs advanced inspection and verification before stones are approved for setting.

When you choose AJO, you receive jewelry crafted with:

• hand-selected diamonds (VS2–VVS, D–F, no fluorescence)
• ideal cut quality and top-tier finishing parameters
• certified gold from leading U.S. suppliers
• advanced Indutherm casting technology
• precision inspection through SISMA systems
• GIA/IGI certification for 1 ct+ stones
• AWDC-verified sourcing from Antwerp

AJO jewelry is designed to shine brighter — and last longer.