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Certified Diamond

certified diamond

Shopping for quality loose-diamonds has never been easier than now at Lewis Jewelers. Our loose diamonds are guaranteed to meet your standards as they have been rigorously inspected not only by our jewelry specialists but also by some of the top grading laboratories around today including the Gemological Institute of America (GIA) and the American Gem Society (AGS).



As one of the most reputable and well-respected gemological grading laboratories, the GIA, or the Gemological Institute of America is a non-profit institute founded in 1931 whose primary purpose is to educate the public in the field of gemology and the jewelry arts. Their unbiased and consistent record has earned them a high reputation among jewelers as the go-to place for diamond certification. The GIA provides comprehensive certification on all the loose diamonds in our galleries using the “4 C’s” of diamond selection.



Shop with confidence knowing that your diamond has undergone the rigorous process of diamond certification. By shopping for your diamond from a reputable jeweler, such as Lewis Jewelers, we can guarantee that your diamond meets the specifications listed in its certificate. With one of the largest inventories of loose diamonds in the Michigan area, guests have the benefit of shopping for the exact qualities they are searching for in a diamond to meet their budget, without any of the worry. Our staff of trusted expert advisors are all non-commissioned so there is absolutely no pressure and you can shop with confidence.



Since 1921, family owned Lewis Jewelers has been “your diamond source.” Our brilliant collection of stunning engagement rings, wedding bands, timepieces, fashion jewelry, and loose diamonds is unparalleled in craftsmanship and design. We are proud to service the greater Michigan area including Detroit, Lansing, Flint, Jackson, Brighton, and the surrounding areas with popular collections of bridal and fashion jewelry.

For more information on our GIA certified loose diamonds, browse through our selection of diamonds, set up a Free Diamond Guidance Appointment from one of our trusted diamond advisors today by calling 1.877.885.3947, or visit us in store, at our Ann Arbor, Michigan location.


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