Princess Cut Black Onyx Engagement Ring Set in Solid 14K Yellow Gold

This black onyx ring set makes a bold, modern statement: a princess-cut natural black onyx, its deep midnight-black surface polished to a mirror sheen, set in solid yellow gold — choose 10K, 14K, or 18K — with a choice of moissanite or natural diamond accents. The high-contrast pairing of black stone and warm gold reads sleek, unconventional, and quietly gothic — designed as a set with a matching band. Solid Yellow Gold · 10K / 14K / 18K Natural Black Onyx · Princess · 5×5mm · 1.4ct Moissanite or Diamond Accents Matching Band Bold & Modern Natural Onyx The black onyx The center is a genuine natural black onyx — a solid, opaque black chalcedony prized for its even, jet-black color and smooth polish. Cut in a crisp princess (square) shape, it delivers clean geometric lines against the gold. Onyx is a natural stone, not dyed glass, and has long symbolized strength, protection, and grounding. Explore more black onyx engagement rings and black gemstone jewelry. A matching set This is designed as a two-ring set: the princess onyx engagement ring plus a coordinating matching band, custom made to complete the stack. Choose your accents from the drop-down menu — premium D-color moissanite (lab-grown, 9.25 Mohs) or natural conflict-free diamond (G/H, I1, 10 Mohs); our guide to whether moissanite is a lab-grown diamond explains how the two compare. A men's matching band can also be made on request. Choose your gold: 10K, 14K, or 18K solid yellow gold This set is solid yellow gold throughout — the metal itself, not plating or vermeil over a base metal. The warm gold throws the black onyx into striking relief, and the color is permanent: it won't wear off and won't turn your skin green. Pick the karat that suits you from the drop-down: 10K — the most durable and most affordable option. Its higher alloy content makes it the toughest choice for hard, everyday wear. 14K — our default and the most popular pick: the classic balance of rich gold color, durability, and value. 18K — the highest gold content for the deepest, warmest yellow and the most luxurious feel. Not sure which to choose? Our 10K vs 14K vs 18K gold guide walks through the trade-offs in plain language. White and rose gold are available on request. Set: Princess onyx engagement ring + matching band (custom made) Center stone: Natural black onyx, princess cut, 5×5mm, ~1.4ct Accents: Choice of moissanite (D) or natural diamond (G/H, I1) Average band width: 1.7mm Metal: Solid yellow gold — 10K, 14K, or 18K, selected from the drop-down (white/rose on request) Engraving: Complimentary, up to 15 characters Made to order: Allow 3–5 weeks for production Every order ships in a complimentary luxury velvet jewelry box Sizing & care Onyx is about 6.5–7 on the Mohs scale — suitable for daily wear with gentle care; avoid hard knocks and harsh chemicals, and clean with a soft damp cloth. Please reference our sizing guide before ordering. An optional written appraisal can be added from the drop-down menu (non-refundable once completed). Black onyx ring set FAQs Is the onyx natural?Yes — genuine natural black onyx, an opaque black chalcedony, not dyed glass or plastic. Its deep even black takes a beautiful polish. Is this a set?Yes — it's designed as a set: the princess onyx engagement ring plus a coordinating matching band, custom made to complete the stack. Can I choose the accent stones?Yes — select premium D-color moissanite or natural conflict-free diamond accents from the drop-down menu. Which metal should I choose?All three options are genuine solid yellow gold — the difference is gold content. 10K is the most durable and affordable, with the highest alloy content for everyday toughness. 14K is our default and most popular: the classic balance of color, durability, and value. 18K has the highest gold content for the richest, warmest yellow. If you're unsure, 14K is the safe all-rounder — and our 10K vs 14K vs 18K gold guide covers the trade-offs in detail. Is this real solid gold?Yes. The set is solid yellow gold in your chosen karat (10K, 14K, or 18K) throughout — the metal itself, not plating or vermeil. The color is permanent, won't wear off, and won't turn skin green. How long does it take to make?Made to order — please allow about 3–5 weeks. Requested modifications may adjust the timeline, and we'll confirm everything before production begins.