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Costco's diamond engagement rings meet high standards. Costco uses the evaluation standards established by the Gemological Institute of America (GIA) to grade its diamonds. These standards ...
On the jewelry side, where Costco’s sales are roughly on par with LVMH’s Tiffany & Co., the in-store assortment can run from $99.99 earrings to $9,000 diamond rings.
One thing you may have never expected to find at Costco -- a place where we commonly go to stock up on things like paper towels and peanut butter pretzels -- is a stunning collection of jewelry,...
Diamond reports from GIA (as well as other, for-profit sources) are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 mg), and almost always for over 1.0 carat (200 mg), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer.
Some jewelry experts advise consumers to buy a 0.99-carat (198 mg) diamond for its better price or buy a 1.10-carat (220 mg) diamond for its better cut, avoiding a 1.00-carat (200 mg) diamond which is more likely to be a poorly cut stone.
Rings with a larger diamond set in the middle and smaller diamonds on the side fit under this category. Three-stone diamond engagement rings, sometimes called trinity rings or trilogy rings, are rings with three matching diamonds set horizontally in a row with the bigger stone placed in the center. The three diamonds on the ring are typically ...