: 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 cut quality and light performance . They specialize in "A CUT ABOVE" super-ideal cut diamonds and provide exhaustive light-performance imagery (ASET, IdealScope) that goes beyond standard GIA reports.

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

: 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.

The term "paper" in diamond buying often refers to two distinct things: the (the diamond's "papers") and physical tests used to verify authenticity.