Offers loose diamonds and custom rings at , with a long history of high-quality service. Expand map High-End & Custom Wholesale & Lab-Grown

: Best for variety and value . As one of the original online jewelers, they offer a vast selection of GIA-certified diamonds and a popular diamond upgrade program.

For those preferring in-person consultations, these highly-rated local jewelers specialize in high-quality diamonds and custom designs: The Diamond Reserve Denver Jewelry store ClosedDenver, CO

: Best for selection and transparency . They offer an massive inventory of over 200,000 certified diamonds and utilize 360° HD viewing technology for every individual stone to allow for remote inspection.

: To check if a loose diamond is real, place it face-down on a piece of newspaper . Because diamonds are highly refractive, you should not be able to read the text through a real diamond . If the print is clear and legible, the stone is likely a fake (like glass or cubic zirconia).

: Best for ethical and sustainable sourcing . They are recognized for their focus on "Beyond Conflict-Free" diamonds, recycled metals, and blockchain-verified traceability.

: High-quality diamonds should always come with a grading report from a reputable laboratory like the Gemological Institute of America (GIA) or the American Gem Society (AGS). These reports verify the 4 Cs : Cut, Color, Clarity, and Carat weight.