Custom Marquise Diamond Engagement Ring in Platinum and Yellow Gold

A distinctive mixed-metal design gives this custom marquise diamond engagement ring a beautifully architectural look. Crafted in platinum with 18k yellow gold accents, the ring centers on a 0.67-carat marquise-cut diamond set vertically to emphasize its elegant, elongated silhouette. The cool tone of the platinum keeps the diamond looking crisp and bright, while touches of yellow gold along the shoulders add warmth and unexpected contrast.

Approximately 0.50 carat total weight of additional diamonds flank the center stone, including tapered baguette-cut diamonds that create a sleek transition into the band. The pointed marquise center and clean, linear side stones give the ring a strong geometric character without feeling overly ornate. Polished yellow gold accents frame the diamond-set shoulders, highlighting the structure of the setting and making the mixed-metal construction an intentional part of the design.

The diamonds are graded approximately SI1 clarity and H color, offering bright sparkle throughout the ring while allowing the different cuts to play beautifully against one another. Weighing a substantial 8.8 grams, the setting feels wonderfully solid while maintaining a refined profile on the hand. The result is an engagement ring that feels classic at its core but far more distinctive than a traditional marquise solitaire.

Details: Custom engagement ring crafted in platinum and 18k yellow gold featuring a 0.67-carat marquise-cut center diamond accented by approximately 0.50 carat total weight of additional diamonds with SI1 clarity and H color. Ring weighs 8.8 grams and is a size 5.5.