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Platinum VS2 I 1.58 CTW Round Diamond Ring (0.90 CTR Center)
In-store pricing snapshot
Last known warehouse price ยท Jul 11, 2026. Currently out of stock.
* Prices shown are for Costco members only.
This platinum engagement ring features a stunning 0.90 carat round brilliant cut center diamond with VS2 clarity and I color grading, set in 950 platinum. The total diamond carat weight is 1.58 carats, with accent diamonds complementing the center stone.
VS2 (Very Slightly Included) clarity indicates diamonds with minor inclusions that are difficult to detect even under 10x magnification, ensuring excellent visual cleanliness. I color diamonds fall in the near-colorless range, appearing white to the naked eye while offering exceptional value. Round brilliant cut diamonds are the most popular and well-studied diamond shape, engineered to maximize light return and brilliance.
Platinum is a premium precious metal prized for its natural white luster, hypoallergenic properties, and exceptional durability. Unlike white gold, platinum does not require rhodium plating to maintain its color, and its density keeps prong settings secure over decades of wear. Costco diamond jewelry is GIA-certified, ensuring independent verification of the stone's grading specifications.