Our Certificates

Quality You Can Trust, Certified by Experts

At Luther Diamonds, each piece of jewelry we offer comes with the assurance of authenticity and excellence. Our certificates, issued by internationally recognized laboratories, provide transparency and accuracy, enabling you to make your purchase with confidence. With every gemstone, whether natural or lab-grown, you receive not just a piece of jewelry but a verified, trusted token of quality.

Natural and Lab-Grown Diamonds

For both natural and lab-grown diamonds, we provide certification from leading authorities such as GIA (Gemological Institute of America) and IGI (International Gemological Institute). These certifications ensure each diamond’s purity, origin, and quality, offering our clients full transparency.

Natural Colored Stones

For natural rubies, sapphires, and emeralds, we provide certification from the GemResearch Swisslab (GRC) as standard, with an option to add GIA certification for an additional fee. Both laboratories are renowned for their thorough analysis methods, but each offers unique advantages.

GRC (GemResearch Swisslab): Known for its reliable and comprehensive gemstone analysis, GRC certifies each colored gemstone with precision, ensuring authenticity and quality.

GIA (Gemological Institute of America): For added prestige, GIA certification is available upon request, offering clients extra assurance, particularly for investment-grade gemstones.

Lab-Grown Colored Stones

We offer certification for lab-grown colored gemstones, including rubies and sapphires, from GRC. This process confirms the stone’s lab-created origin and quality, allowing you to confidently enjoy the beauty of these eco-friendly, affordable alternatives.

Certification FAQs Section

What’s the difference between GIA and IGI certifications?

GIA is renowned for its strict grading standards and reputation, while IGI is known for its accuracy and speed, making it an excellent option for lab-grown diamonds.

Can I request additional certifications?

Yes, you can! We offer the option to add certifications by request, whether you want to add a GIA or GRC certificate for your gemstone. Simply reach out, and we’ll arrange the additional certification for you.

Can I get a GIA certificate for my natural emerald, sapphire, or diamond instead of IGI or GRC?

Yes, absolutely! We can provide a GIA certification for your natural emerald, sapphire, or diamond upon request. The turnaround time is generally 1-2 months, and the certification fee is $200. Please contact our support team to begin the process.

How long does the custom certification process take?

For IGI and GRC certifications, our processing time is typically between 2-3 weeks. GIA certifications may take a bit longer, averaging 4-6 weeks, as GIA’s rigorous standards involve extensive quality checks to ensure accuracy.

Are lab-grown gemstones certified in the same way as natural stones?

Yes, our lab-grown gemstones are certified with the same rigor as natural stones. For lab-grown diamonds, we generally recommend IGI certification for its speed and accuracy. Lab-grown colored gemstones can also receive GRC certification, guaranteeing they meet all quality standards.

Can I switch to a different certification if I’ve already purchased a stone with IGI/GRC?

Yes, if you’d like to change to a different certification, we can facilitate this for you. Simply contact us, and we’ll help coordinate the recertification with your chosen lab. Additional fees and processing times will apply, depending on the certification type.

Why should I choose GIA certification over other options?

GIA is internationally recognized for its meticulous grading standards, making it the preferred choice for those seeking added assurance or considering investment-grade gemstones. GIA certification is highly respected worldwide and can be a valuable addition for pieces intended as heirlooms.

What’s the cost of adding a GIA certification to my gemstone?

Adding a GIA certification to a gemstone typically costs $200, which includes the grading and certification fees. The process takes around 1-2 months, as GIA’s evaluation process is highly thorough to ensure accuracy and quality.

Can I request a digital copy of my certification?

Yes, upon request, we can provide a digital copy of your certification. You’ll receive a high-resolution PDF that you can keep for your records or share with insurance providers.

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