4X8mm Marquise Cut Black Onyx Promise Ring with Diamond Bypass Shank

Product Description

Created for a promise with depth, confidence, and a modern romantic edge, this black onyx promise ring brings together a dramatic center stone and a diamond-accented bypass shank. The marquise cut black onyx sits in a tilted prong arrangement, giving the ring a striking sense of movement, while small round diamonds follow the graceful curves of the bypass band. It is a meaningful choice for a proposal, pre-engagement moment, anniversary, or a personal milestone that deserves a ring with unmistakable character.

Diamond Promise Ring with Marquise Cut Black Onyx

This promise ring is crafted with one marquise black onyx measuring approximately 4 x 8 mm, with an approximate center stone weight of 0.74 carat. The black onyx is brilliant cut, AAA quality grade, and secured in a 2-prong setting with a tilted silhouette. Twenty round diamond accents add approximately 0.23 carat of sparkle along the bypass shank, creating a bold contrast between deep black color and delicate diamond light.

What Makes This Special

The ring features one marquise shaped black onyx with an approximate total weight of 0.74 carat. The center stone measures approximately 4 x 8 mm, giving the design an elongated focal point with a sleek, dramatic presence.

The black onyx is black in color, brilliant cut, marquise in shape, AAA quality grade, and secured in a 2-prong setting. Its tilted placement gives the ring a distinctive modern profile, while the bypass shank curves around the center stone with a graceful sense of motion.

The diamond detail includes 20 round diamonds with an approximate total weight of 0.23 carat. The layout includes 8 round diamonds measuring approximately 1.20 x 1.20 mm, 10 round diamonds measuring approximately 1.30 x 1.30 mm, and 2 round diamonds measuring approximately 1.40 x 1.40 mm. The diamonds are HI in color, brilliant cut, SI quality grade, and secured in 2-prong settings.

The ring has an approximate weight of 2.40 gm. Metal options include 92.5 sterling silver, 10K white gold, 10K yellow gold, 14K white gold, 14K yellow gold, 18K white gold, and 18K yellow gold. Ring sizes are available from US 3 to US 13, including quarter-size options.

Why Choose This Design

The marquise cut black onyx gives the ring an elongated shape that flatters the finger and creates a strong central focus. Its dark color makes the design feel confident and personal, while the brilliant cut adds refined dimension to the stone’s surface.

The bypass shank brings movement and symbolism to the ring, with two flowing sides meeting around the center stone. Diamond accents along the band soften the bold black onyx with light, making the design suitable for someone who wants a promise ring that feels distinctive, romantic, and wearable beyond a single occasion.

Design Meaning

Black onyx is often associated with strength, protection, grounding, and inner confidence. In this promise ring, the marquise center stone can represent a focused commitment, while the bypass shank suggests two paths coming together around a shared promise. The diamond accents add brightness to the meaning, symbolizing support, celebration, and the moments that illuminate a lasting bond.

Authenticity & Craftsmanship

Each ring is carefully crafted with attention to black onyx placement, tilted stone alignment, diamond setting security, bypass shank balance, and refined finishing. Rosec Jewels offers a Certificate of Authenticity with the product, adding confidence to the purchase experience. Before dispatch, every piece goes through stone inspection, setting security review, and finishing inspection to help ensure it is ready for wearing or gifting. For lasting care, store the ring separately, avoid harsh chemicals, and wipe it gently with a soft cloth after wear.

Style and Wearability

This black onyx and diamond bypass ring brings bold contrast to the hand while keeping its silhouette graceful and easy to style. It pairs well with slim diamond bands, plain gold rings, black gemstone jewelry, and both warm or cool metal tones depending on the selected metal. Worn as a promise ring, pre-engagement ring, anniversary piece, or statement ring, it adds depth, movement, and personal meaning to everyday and occasion looks.