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.

At Luther Diamonds, every gemstone and diamond undergoes a rigorous certification process. Our trusted third-party partners ensure each piece’s authenticity and quality, providing you with peace of mind.

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.

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.

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.