Every piece in this collection features a center stone or multiple stones independently certified by one of the world's leading gemological laboratories—GIA, GRS, Gübelin, SSEF, AGL, or equivalent. No exceptions. These are the most reputable gem labs in the world, so you can feel confident knowing that you're getting exactly what's advertised and can protect your investment.

At Assay Jewelers, we specialize in certified gemstone jewelry and GIA certified jewelry featuring exceptional sapphires, diamonds, rubies, and other rare gemstones. Our collection includes pieces with GRS certified gemstones and Gübelin certified gems, ensuring authenticity, quality, and transparency for every purchase.

As a destination for fine jewelry in Miami, we carefully curate extraordinary pieces that combine timeless craftsmanship with independently verified gemstones. Whether you're searching for a statement piece, an heirloom-quality ring, or investment-grade gemstones, our certified jewelry collection offers unmatched confidence and long-term value.