Real in-store prices from 600+ Costco locations. Download on the App Store to track prices, scan shelf tags, and get alerts.
Platinum VS2 I 0.40 CT Round Diamond Solitaire Ring
In-store pricing snapshot
Last known warehouse price ยท Apr 1, 2026. Currently out of stock.
* Prices shown are for Costco members only.
This elegant solitaire engagement ring features a 0.40 carat round brilliant cut diamond set in 950 platinum. The center diamond is GIA certified with VS2 clarity (very slight inclusions visible only under 10x magnification) and I color grade (near-colorless on the diamond color scale). The diamond measures approximately 4.5-4.8mm in diameter, creating a delicate and refined appearance.
The ring is crafted from 950 platinum, a superior precious metal known for its exceptional density, resistance to wear, and excellent stone-holding properties. Platinum's naturally white luster enhances the diamond's brilliance without plating or special treatments. The classic solitaire design showcases the diamond's natural beauty with a timeless four or six-prong setting that maximizes light performance and sparkle.
Each ring includes a GIA Diamond Grading Report that describes the characteristics of the diamond based upon 10x magnification. All diamonds are natural and untreated, ensuring authenticity and lasting value. The solitaire setting style allows maximum light to enter the diamond from all angles, optimizing its brilliance and fire.