Coffin Cut Lab Ruby & Black Onyx Ring in 14K Rose Gold Vermeil

This coffin cut ruby engagement ring centers a 2.1 carat AAA lab-grown ruby in a striking elongated coffin silhouette, set in 14K rose gold vermeil over 925 sterling silver. Black onyx accents cluster on each side of the center stone — three pieces in pear and round cuts — turning a classic red-stone engagement ring into something darker, sharper, and unmistakably modern. Built for the bride who wants something nobody else is wearing.

The Ruby

• AAA-grade lab-grown ruby, coffin cut, 7.0 × 10.0 mm, approximately 2.1 carats
• Origin: Thailand — one of the world's top sources for high-quality lab-grown corundum
• Deep, saturated blood-red color that's the signature of fine ruby
• Mohs 9 hardness — second only to diamond, ideal for daily engagement-ring wear
• Coffin cut is an elongated hexagonal step cut — geometric, architectural, strikingly different from a standard oval or pear

The Black Onyx Accents

• Six natural black onyx accents — three on each side of the center ruby
• Pear cuts at the outer edges with round cuts clustered in three-stone trinities at each shoulder
• Deep, opaque, polished velvet-black surface — the perfect contrast to the ruby's red fire
• Black onyx has been used in rings, amulets, and cameos since ancient Greece, traditionally associated with strength and protection

The Setting

• Six-prong basket secures the coffin-cut center stone — extra prongs for the elongated shape
• Three-stone clusters on each shoulder built from a pear and two rounds, in matching prong settings
• Asymmetric, dynamic silhouette — the coffin reads architectural while the trinity clusters add softness and movement
• Clean rose gold metalwork keeps the focus on the stone contrasts

The Band

• 14K rose gold vermeil over 925 solid sterling silver — the warm rose gold tone catches the ruby's red and softens against the black onyx
• Plating note: rose gold vermeil will gradually wear with daily use over time; if long-term plating durability is the priority, consider the solid sterling silver or solid gold version
• Comfort-fit interior

Why Lab-Grown Ruby

• Chemically and optically identical to mined ruby — same corundum composition, same Mohs 9 hardness, same crystal structure
• AAA grade denotes top color saturation and clarity tier
• Ethically grown in a lab without the human rights concerns that have historically plagued the natural ruby trade in certain regions
• Vivid, consistent color saturation that's often hard to find in natural ruby at this carat weight
• Lets you wear a 2.1ct AAA-tier center stone without the natural-ruby price tag

Who It's For

• Brides drawn to gothic, witchy, dark-romantic, or alt-bridal engagement rings over traditional white-diamond solitaires
• Anyone born in July (ruby is the July birthstone) or celebrating a 15th or 40th anniversary
• Partners shopping for a coffin engagement ring with real symbolism in the silhouette — an unconventional shape with weight behind it
• Women drawn to red-and-black color stories and dramatic statement jewelry
• Buyers who want a unique engagement ring that breaks every traditional rule about bridal jewelry

The Details

• Metal: 14K rose gold vermeil over 925 solid sterling silver
• Center stone: AAA lab-grown ruby, coffin cut, 7.0 × 10.0 mm, ~2.1 ct, Mohs 9, Thai origin
• Accent stones: Natural black onyx — pear cuts and round cuts, six total in shoulder clusters
• Setting style: Coffin solitaire with three-stone shoulder trinities
• Fit: Comfort-fit interior
• Free USA shipping
• Packaged in a gift-ready ring box