This 1.20 carat round brilliant-cut natural diamond engagement ring is crafted in a classic four-prong solitaire setting in platinum. The center diamond carries VS1 clarity — a high grade where inclusions are not visible to the naked eye even under 10x magnification — and I color, placing it in the near-colorless range for a bright, white appearance with excellent value relative to higher color grades.

Platinum was chosen for the setting for good reason: it is one of the strongest and most durable precious metals, with a naturally white luster that will never yellow or fade over time. Unlike white gold, platinum does not require rhodium replating and develops a distinctive patina that many prefer. The solitaire silhouette keeps full attention on the center stone, making this ring a timeless choice for an engagement or milestone occasion.

Costco's diamond jewelry is accompanied by independent laboratory grading documentation certifying the stone's quality characteristics. The ring is sold with Costco's standard satisfaction guarantee and return policy.