Truly unique · Black zirconium
Three diamonds, black, bright edges
From £850
Three diamonds on a black dome, with bright metal at both shoulders.
A dome profile black zirconium band with its shoulders cut back to the bright natural metal, set with three 2.5mm diamonds across the top, as photographed.
Made to order · 2 to 3 weeks · posted insured
Before you order, in one place
- What you are buying
- Three diamonds, black, bright edges, black zirconium, made to order in your size. Widths 6 to 10mm.
- Price
- £850 total. UK delivery and engraving are included and nothing is added at checkout.
- When it arrives
- 2 to 3 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
- Delivery2 to 3 weeks, insured
- Returns30 days, unengraved
- EngravingOptional, included, inside the band
- StoneThree diamonds, 0.18ct, Mohs 10
Also in: Wedding rings, His and hers, Men's rings, Black rings
About this ring
Three diamonds, black, bright edges, in detail
A dome profile black zirconium band with its shoulders cut back to the bright natural metal and three 2.5mm diamonds set across the top, as photographed. Three white stones on black, with a bright line at each edge.
How it wears
Diamond is the hardest gemstone, at 10 on the Mohs scale. Black zirconium's surface is around Mohs 8 and the metal is hypoallergenic, at 6.5 grams per cubic centimetre.
Choosing yours
It can be an engagement ring or a wedding ring. It is paired with Three diamonds, shoulder cut, the same three stones on titanium.
Width by width
| Width | How it reads | Weight, est. | Price |
|---|---|---|---|
| 6mm | Classic, the usual starting point for a band | 3.2g | £850 |
| 7mm | Classic to broad, more of the pattern shows | 3.7g | £850 |
| 8mm | Broad, a ring that is clearly there | 4.2g | £875 |
| 9mm | Wide and bold, best on a larger hand | 4.7g | £875 |
| 10mm | Wide and bold, best on a larger hand | 5.3g | £875 |
Weights are estimates for a plain band of the same width in black zirconium at UK size N with a 1.6mm wall, from the model in our ring weight calculator. A pattern cut into the surface removes a little metal, so the finished ring is slightly lighter. The price steps up at the widths that take more metal to make.
How it compares with the rings nearest it
| Ring | What sets it apart | Metal | Widths | Surface hardness | From |
|---|---|---|---|---|---|
| Three diamonds, black, bright edges (this ring) | Three diamonds on a black dome, with bright metal at both shoulders. | Black zirconium | 6 to 10mm | Mohs 8 | £850 |
| Three diamonds, black | Three diamonds along a bright line through black. | Black zirconium | 4 to 10mm | Mohs 8 | £625 |
| One diamond, black | A single ten point diamond, flush set into black. | Black zirconium | 4 to 10mm | Mohs 8 | £475 |
| Tyre tread, black | A tyre tread, cut around a black zirconium band. | Black zirconium | 4 to 10mm | Mohs 8 | £449 |
There are 25 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, and 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 Three diamonds, black, bright edges
- 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, and 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, and there is no charge and no extra wait.
- How long will it take?
- 2 to 3 weeks. It is made in your size after you order, not picked off a shelf, and 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, and 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 Three diamonds, 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 £850, and 8mm, 9mm, 10mm £875, because the wider bands take more metal to make.
- What is closest to the Three diamonds, black, bright edges in the range?
- Three diamonds, black (black zirconium) and One diamond, black (black zirconium). The comparison table on this page sets them side by side on metal, width, hardness and price.
- What if I get the size wrong?
- If it is unengraved, return it inside 30 days and we refund it, and we pay the postage. Use the free ring size finder first if you are unsure, and if the ring is a surprise, ask us and we will talk you through the ways to find out without asking them.