Multi toned · Anodised zirconium
Single groove, anodised
From £269
One fine groove of colour around a polished band.
A single narrow groove runs around a polished natural zirconium band and is anodised, so the ring is one line of colour on bright metal. The simplest coloured ring we make, and the one that goes with everything.
Made to order · 2 to 3 weeks · posted insured
Before you order, in one place
- What you are buying
- Single groove, anodised, anodised zirconium, made to order in your size. Widths 4 to 10mm.
- Price
- £269 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.
- MaterialAnodised zirconium
- Surface hardnessMohs 8.5
- Density6.5 g/cm³
- ResizableSpecialist assessment
- HallmarkedNot applicable, non precious
- MadeTo order, in your size
- Delivery2 to 3 weeks, insured
- Returns30 days, unengraved
- EngravingOptional, included, inside the band
Also in: Wedding rings, Promise rings, His and hers, Men's rings
About this ring
Single groove, anodised, in detail
One narrow groove runs around a polished band of natural zirconium and is anodised, leaving a single fine line of colour in bright, reflective metal. That is the whole design. It is the most minimal of the coloured rings, and the polish makes the most of it: the band shines like a plain metal ring, with the line of colour drawn through it like a thread. From a little distance it reads as a bright band. Close up, the colour appears.
How it wears
Most of this ring is polished zirconium, hypoallergenic and hard, and like any polished metal it will gather fine marks and settle into a softer shine as it is worn. The colour sits in its narrow groove, below the face that takes the contact. Anodised colour is a surface oxide, so heavy abrasion can wear it; residue, by contrast, only dulls it until it is cleaned. Cleaning the groove rather than polishing it keeps the colour exactly where it is.
Choosing yours
This is the coloured ring that goes with everything, which makes it a natural choice beside an engagement ring or among other jewellery worn daily. At 4 or 5mm the line is a whisper of colour; at 8 to 10mm the polished band has more presence and the line becomes a clear accent. Dark blue gives depth, bronze warmth, pink or yellow brightness. For a partner who wants one more line, Twin grooves, anodised is its close neighbour on the same polished band.
Width by width
| Width | How it reads | Weight, est. | Price |
|---|---|---|---|
| 4mm | Slim, the quietest everyday width | 2.1g | £269 |
| 5mm | Between slim and classic | 2.6g | £269 |
| 6mm | Classic, the usual starting point for a band | 3.2g | £269 |
| 7mm | Classic to broad, more of the pattern shows | 3.7g | £269 |
| 8mm | Broad, a ring that is clearly there | 4.2g | £295 |
| 9mm | Wide and bold, best on a larger hand | 4.7g | £295 |
| 10mm | Wide and bold, best on a larger hand | 5.3g | £295 |
Weights are estimates for a plain band of the same width in anodised zirconium at UK size N with a 1.6mm wall, from the model in our ring weight calculator. 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 |
|---|---|---|---|---|---|
| Single groove, anodised (this ring) | One fine groove of colour around a polished band. | Anodised zirconium | 4 to 10mm | Mohs 8.5 | £269 |
| Twin grooves, anodised | Two fine grooves of colour around a polished band. | Anodised zirconium | 4 to 10mm | Mohs 8.5 | £269 |
| Three grooves, anodised | Three fine lines of colour across a satin band. | Anodised zirconium | 4 to 10mm | Mohs 8.5 | £269 |
| Anodised channel | A band of real colour, set between natural metal edges. | Anodised zirconium | 4 to 10mm | Mohs 8.5 | £285 |
There are 13 anodised zirconium bands in the range, from £269 to £365. All about anodised zirconium.
The metal, in brief
Zirconium grows its own oxide layer under electrical current, and the thickness of that layer decides the colour. Nothing is painted, plated or dyed. The colour is the surface of the metal itself, produced by light interfering with a film a few hundred nanometres thick, which is why it shifts slightly as you turn your hand.
Surface hardness Mohs 8.5, 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, Anodised zirconium or titanium, Anodised zirconium or sterling silver. Or read the full anodised zirconium guide.
Work it out before you order
About Single groove, anodised
- Can this ring be resized?
- Anodised zirconium needs an assessment of both the band and its coloured surface. Advice about plain titanium or black zirconium does not establish what can be done to this particular finish. Before ordering, confirm the options if the fit changes: whether an alteration is possible, whether colour and engraving can be retained, or whether a separate remake would be needed. No alteration or remake is promised without a quote for the exact ring.
- 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 Single groove, anodised ring weigh?
- About 2.1g at 4mm, 3.2g at 6mm, 5.3g at 10mm, estimated for a plain band in anodised 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?
- 4 to 10mm. 4mm, 5mm, 6mm, 7mm are £269, and 8mm, 9mm, 10mm £295, because the wider bands take more metal to make.
- What is closest to the Single groove, anodised in the range?
- Twin grooves, anodised (anodised zirconium) and Three grooves, anodised (anodised 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.