Truly unique · Black zirconium
One diamond, black, bright edges
From £475
One diamond in a black band, between chamfered edges cut back to bright metal.
A band in black zirconium with bright natural metal, made in your size in widths from 6mm to 10mm. £475 from 6mm to 7mm and £500 from 8mm to 10mm, delivered free in the UK, with engraving included. About 3.2g at 6mm in UK size N. Made to order in 1 to 2 weeks, with 30 days to return it unengraved.
A flat profile relieved black zirconium band with chamfered edges, set with one 6 point round brilliant cut diamond, 2.5mm across, SI clarity and G to H colour.
Made to order · 1 to 2 weeks · posted insured
Ask a question about this ring
Before you order, in one place
- What you are buying
- One diamond, black, bright edges, black zirconium, made to order in your size. Widths 6 to 10mm.
- Price
- £475 total. UK delivery and engraving are included and nothing is added at checkout.
- When it arrives
- 1 to 2 weeks to make, then one working day insured and signed for. Delivery in full
- Changing your mind
- 30 days from delivery, return postage paid, unless you have it engraved. The cancellation right
- Who you are contracting with
- Trothe Ltd, registered in England and Wales, company number 17431230, Lytchett House, 13 Freeland Park, Wareham Road, Poole, Dorset, BH16 6FA. Questions and complaints to hello@trothe.co.uk.
- MaterialBlack zirconium
- Surface hardnessMohs 8
- Density6.5 g/cm³
- ResizableNot usually
- HallmarkedNot applicable, non precious
- MadeTo order, in your size
- Delivery1 to 2 weeks, insured
- Returns30 days, unengraved
- EngravingOptional, included, inside the band
- StoneOne diamond, SI clarity, G to H colour, 0.06ct, Mohs 10
Also in: Wedding rings, Engagement rings, His and hers, Men's rings
In short
One diamond, black, bright edges: price, weight and delivery
| Width | How it reads | Weight, est. | Price |
|---|---|---|---|
| 6mm | Classic, the usual starting point for a band | 3.2g | £475 |
| 7mm | Classic to broad, more of the pattern shows | 3.7g | £475 |
| 8mm | Broad, a ring that is clearly there | 4.2g | £500 |
| 9mm | Wide and bold, best on a larger hand | 4.8g | £500 |
| 10mm | Wide and bold, best on a larger hand | 5.3g | £500 |
Weights are estimates for a plain band of the same width in black zirconium at UK size N with a 1.6mm wall, from our ring weight calculator. A pattern cut into the surface removes a little metal, so the finished ring is slightly lighter. Not sure of the width? The band width guide helps you choose.
- When it arrives
- 1 to 2 weeks to make, then one working day in the post.
- Delivery and returns
- Free UK delivery, insured for its full value, tracked and signed for. 30 days from delivery, return postage paid, unless you have it engraved. How returns work
- Size
- UK A to Z+10, half sizes included, all one price. Buying it as a surprise? Choose I do not know yet and we confirm the size with you before anything is made. Find your size
- Resizing
- Not in the usual way. The black is grown into the surface of the metal, so cutting or machining the band would show bright metal underneath. That is why the size is settled before the ring is made and every ring is made to that measurement.
- Titanium or black zirconium
- Titanium is the lighter of the two at 4.5 g/cm³ against 6.5. Black zirconium has the harder surface, around Mohs 8 against 6. Neither is plated and neither tarnishes. Black zirconium or titanium, compared
- Working with your hands
- Take any ring off for abrasive or heavy work and follow your workplace rules around machinery and electrics. Wedding rings for hands-on jobs
About this ring
One diamond, black, bright edges, in detail
A flat profile relieved black zirconium band whose chamfered edges are cut back to the bright natural metal, set with one 6 point round brilliant cut diamond, 2.5mm across, SI clarity and G to H colour.
How it wears
Black zirconium's surface is around Mohs 8 and the metal is hypoallergenic, at 6.5 grams per cubic centimetre. Diamond is the hardest gemstone, at 10 on the Mohs scale.
Choosing yours
It can be an engagement ring or a wedding ring. One stone keeps it simple; the bright edges frame the black.
How it compares with the rings nearest it
| Ring | What sets it apart | Metal | Widths | Surface hardness | From |
|---|---|---|---|---|---|
| One diamond, black, bright edges (this ring) | One diamond in a black band, between chamfered edges cut back to bright metal. | Black zirconium | 6 to 10mm | Mohs 8 | £475 |
| One diamond, black | A single ten point diamond, flush set into black. | Black zirconium | 4 to 10mm | Mohs 8 | £475 |
| Raised Roman numerals, black | Your date in large Roman numerals, raised on a black zirconium band. | Black zirconium | 6 to 10mm | Mohs 8 | £449 |
| Tyre tread, black | A tyre tread, cut around a black zirconium band. | Black zirconium | 4 to 10mm | Mohs 8 | £449 |
There are 28 black zirconium bands in the range, from £199 to £1,525. All about black zirconium.
The metal, in brief
Heating zirconium forms a black ceramic oxide at its surface. The colour comes from that oxide, rather than applied black plating. It is a hard surface over a softer metal core, so scratch resistance does not mean the whole ring is black or immune to damage.
Surface hardness Mohs 8, density 6.5 g/cm³. It is hypoallergenic, so it is a sound choice for skin that reacts to nickel. It is not a precious metal, so it carries no hallmark.
Compared side by side: Anodised zirconium or black zirconium, Black zirconium or titanium, Black zirconium or sterling silver. Or read the full black zirconium guide.
Work it out before you order
About One diamond, black, bright edges
- How much does the One diamond, black, bright edges ring cost?
- £475 from 6mm to 7mm and £500 from 8mm to 10mm. That is the whole price: UK delivery is free, insured and signed for and engraving inside the band is included. The size makes no difference to the price.
- Can this ring be resized?
- Not in the usual way. The black is grown into the surface of the metal, so cutting or machining the band would show bright metal underneath. That is why the size is settled before the ring is made and every ring is made to that measurement.
- Is engraving included?
- Yes. It is optional. Leave the box blank and the ring is made plain. If you do want one it is laser cut inside the band where the ring is made, rather than sent out to a third party. There is no charge and no extra wait.
- How long will it take?
- 1 to 2 weeks. It is made in your size after you order, not picked off a shelf. That is the reason the widths and finishes are open choices.
- Can I return it if I have it engraved?
- Not for a change of mind. An engraving makes the ring clearly personalised, which puts it outside the statutory right to cancel. It cannot be resold. Every ring shop draws the line here. Order it plain and you keep the full 30 days. Either way, a ring that arrives faulty or is not what you ordered is covered by the Consumer Rights Act, which nothing waives.
- How much does the One diamond, black, bright edges ring weigh?
- About 3.2g at 6mm, 5.3g at 10mm, estimated for a plain band in black zirconium at UK size N. Larger sizes and wider bands weigh more. It is a light ring by any standard: 18ct gold of the same size is more than twice the weight.
- What widths does it come in and do they cost the same?
- 6 to 10mm. 6mm, 7mm are £475 and 8mm, 9mm, 10mm £500, because the wider bands take more metal to make.
- What is closest to the One diamond, black, bright edges in the range?
- One diamond, black (black zirconium) and Raised Roman numerals, black (black zirconium). The comparison table on this page sets them side by side on metal, width, hardness and price.
- Can I see the One diamond, black, bright edges on my hand before I buy it?
- Yes. Our free ring try-on draws this ring onto a photo of your own hand, at any width from 6mm to 10mm, from this ring's own photograph. Press See it on your hand under the photograph. Each email address gets three pictures every thirty days and your photo is deleted once the picture is made.
- What if I get the size wrong?
- If it is unengraved, return it inside 30 days and we refund it and pay the postage. Use the free ring size finder first if you are unsure. If the ring is a surprise, ask us and we will talk you through the ways to find out without asking them.
- What should I know about black zirconium before I buy?
- The oxide is around Mohs 8: scratch resistant, not scratch proof. A hard knock against stone or steel can mark it and show the lighter metal underneath. A pale line is often metal rubbed off something else, which cleans away. Our maker refinishes black zirconium depending on the damage. Around machinery and electrics, follow your workplace rules on jewellery, whatever the ring is made of.