Princess Cut Black Onyx Engagement Ring Set in 14K/18K White Gold
This princess cut black onyx ring set centers a bold princess-cut natural black onyx — deep midnight black with crisp geometric edges — against cool white gold, matched to a coordinating band. A striking, unconventional two-piece set for someone whose style leans modern, gothic, and unmistakably their own. Choose 14K or 18K white gold.
The black onyx
The center is a genuine natural black onyx in a princess cut — a square step-and-brilliant cut whose sharp corners give the deep black stone a clean, architectural edge. Onyx is a form of chalcedony quartz (6.5–7 Mohs), and its true midnight-black color reads bold and modern against white gold. Our non-traditional engagement ring guide and moissanite explainer are useful reads for this style.
The set & accents
Engagement Ring
Princess-cut black onyx center (5×5mm, ~1.4ct) with a choice of moissanite or natural diamond accents. 14K or 18K white gold.
Matching Band
Coordinating band designed to nest against the engagement ring. Matching white gold.
Choose your accents from the drop-down: premium D-color moissanite (9.25 Mohs) or natural conflict-free diamond. Sold as a two-piece set; each ring can also be worn on its own. Explore more black onyx engagement rings and coordinating wedding ring sets.
Why solid white gold
This set is solid white gold — the metal itself, not plating or vermeil over a base metal — in your choice of 14K or 18K. The cool white maximizes the contrast with the black onyx. The color is permanent: it won't wear off and won't turn your skin green. Also available in yellow or rose gold on request.
- Set composition: Two-piece — engagement ring + matching band
- Center stone: Natural black onyx, princess cut, 5×5mm, ~1.4ct, 6.5–7 Mohs
- Accents: Choice of D-color moissanite or natural diamond
- Average band width: 1.7mm
- Metal: Solid 14K or 18K white gold (yellow/rose on request)
- Engraving: Complimentary, up to 16 characters
- Made to order: Allow 2–5 weeks for production
- Every order ships in a complimentary luxury velvet jewelry box
Sizing & care
Black onyx is 6.5–7 Mohs — fine for daily wear with sensible care; avoid hard knocks that could chip the princess corners, and clean with warm soapy water and a soft cloth. Both rings should be ordered in the same size; please reference our sizing guide before ordering. An optional written appraisal can be added from the drop-down menu (non-refundable once completed).
Princess cut black onyx ring set FAQs
Is the black onyx natural?
Yes — genuine natural black onyx, a form of chalcedony quartz, in a princess cut. Not simulated.
Can I choose the accent stones?
Yes — select premium D-color moissanite or natural conflict-free diamond accents from the drop-down menu.
Is this a set or a single ring?
It's a two-piece set — the princess-cut onyx engagement ring plus a coordinating band. Each can also be worn alone.
What's the difference between 14K and 18K?
Both are solid white gold; 18K has a higher gold content for a slightly richer feel, while 14K is a touch harder for everyday durability. Choose your preference from the drop-down.
How long does it take to make?
Made to order — please allow about 2–5 weeks. Requested modifications may adjust the timeline, and we'll confirm everything before production begins.
Original: $2,392.95
-70%$2,392.95
$717.88Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
This princess cut black onyx ring set centers a bold princess-cut natural black onyx — deep midnight black with crisp geometric edges — against cool white gold, matched to a coordinating band. A striking, unconventional two-piece set for someone whose style leans modern, gothic, and unmistakably their own. Choose 14K or 18K white gold.
The black onyx
The center is a genuine natural black onyx in a princess cut — a square step-and-brilliant cut whose sharp corners give the deep black stone a clean, architectural edge. Onyx is a form of chalcedony quartz (6.5–7 Mohs), and its true midnight-black color reads bold and modern against white gold. Our non-traditional engagement ring guide and moissanite explainer are useful reads for this style.
The set & accents
Engagement Ring
Princess-cut black onyx center (5×5mm, ~1.4ct) with a choice of moissanite or natural diamond accents. 14K or 18K white gold.
Matching Band
Coordinating band designed to nest against the engagement ring. Matching white gold.
Choose your accents from the drop-down: premium D-color moissanite (9.25 Mohs) or natural conflict-free diamond. Sold as a two-piece set; each ring can also be worn on its own. Explore more black onyx engagement rings and coordinating wedding ring sets.
Why solid white gold
This set is solid white gold — the metal itself, not plating or vermeil over a base metal — in your choice of 14K or 18K. The cool white maximizes the contrast with the black onyx. The color is permanent: it won't wear off and won't turn your skin green. Also available in yellow or rose gold on request.
- Set composition: Two-piece — engagement ring + matching band
- Center stone: Natural black onyx, princess cut, 5×5mm, ~1.4ct, 6.5–7 Mohs
- Accents: Choice of D-color moissanite or natural diamond
- Average band width: 1.7mm
- Metal: Solid 14K or 18K white gold (yellow/rose on request)
- Engraving: Complimentary, up to 16 characters
- Made to order: Allow 2–5 weeks for production
- Every order ships in a complimentary luxury velvet jewelry box
Sizing & care
Black onyx is 6.5–7 Mohs — fine for daily wear with sensible care; avoid hard knocks that could chip the princess corners, and clean with warm soapy water and a soft cloth. Both rings should be ordered in the same size; please reference our sizing guide before ordering. An optional written appraisal can be added from the drop-down menu (non-refundable once completed).
Princess cut black onyx ring set FAQs
Is the black onyx natural?
Yes — genuine natural black onyx, a form of chalcedony quartz, in a princess cut. Not simulated.
Can I choose the accent stones?
Yes — select premium D-color moissanite or natural conflict-free diamond accents from the drop-down menu.
Is this a set or a single ring?
It's a two-piece set — the princess-cut onyx engagement ring plus a coordinating band. Each can also be worn alone.
What's the difference between 14K and 18K?
Both are solid white gold; 18K has a higher gold content for a slightly richer feel, while 14K is a touch harder for everyday durability. Choose your preference from the drop-down.
How long does it take to make?
Made to order — please allow about 2–5 weeks. Requested modifications may adjust the timeline, and we'll confirm everything before production begins.
