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3.64 CT Cushion Blue Spinel and 0.46 CTW Diamond Platinum Ring
In-store pricing snapshot
Last known warehouse price ยท Mar 9, 2026. Currently out of stock.
* Prices shown are for Costco members only.
This platinum ring features a stunning 3.64-carat cushion-cut blue spinel center stone accented by 0.46 total carat weight of diamonds. Blue spinel is prized for its vivid, saturated color and excellent brilliance, offering a durable alternative to sapphire with a hardness of 8 on the Mohs scale. The cushion cut enhances the stone's natural color saturation and light performance, while the platinum setting provides a secure, hypoallergenic mounting that complements the cool blue tones of the spinel.
The diamond accents add sparkle and frame the center stone beautifully. Platinum is one of the most durable precious metals for fine jewelry, resistant to tarnish and wear over time. This ring is ideal as a statement cocktail ring or a distinctive engagement ring alternative.