A black diamond engagement ring is almost always a treated stone, and the useful question is whether the seller tells you so. GIA wrote in January 2026 that many black diamonds used in engagement rings have been treated to reach their dark color. Three of the four picks below are complete Angara rings whose listings name the treatment, irradiation, and they cost $881 to $1,115 with the black diamond included, as read on 6 November 2026. The fourth is a Rare Carat setting with black diamonds along the band and a white center stone you choose yourself.
How we are paid. RingReel earns a commission from Rare Carat through the Awin network when you buy through a Rare Carat link on this page, at no cost to you. Angara pays us nothing for its links: we list it because it is on our approved list of jewelers. Nothing here was bought or handled: it is researched, not tested.
What is on this page11 sections
Our Top Picks
- Our top pick
Best overall
Illustration of the setting type, not a photo of this ring.
Angara Prong-Set Enhanced Black Diamond Solitaire RingA buyer who wants a black center stone at a complete-ring price, with the treatment written on the page.
- 14K white gold; complete ring with a 7/8 ct round black diamond
- $881
Best with metal detail
Illustration of the setting type, not a photo of this ring.
Angara Round Enhanced Black Diamond Solitaire Ring with Heart CarvingSomeone who wants the black stone softened by a romantic detail in the metal rather than a plain shank.
- 14K white gold; complete ring with a 7/8 ct round black diamond
- $998
Best princess cut
Illustration of the setting type, not a photo of this ring.
Angara Princess-Cut Enhanced Black Diamond Solitaire RingA buyer who wants a square black stone with a geometric, modern look.
- 14K white gold; complete ring with a 1 1/6 ct princess black diamond
- $1,115
Best with a white center
Illustration of the setting type, not a photo of this ring.
Rare Carat Spectra Black Diamond Engagement RingA buyer who wants black in the ring but a white diamond, lab or natural, in the center.
- 14K white gold setting; center stone not included
- $985
What is on this page11 sections
Key Takeaways
- GIA’s 2026 buying guide says most natural black diamonds get their color from countless tiny mineral inclusions, and that treated black diamonds are far more common than naturally black ones.
- Each of the three Angara rings lists its black diamond as irradiated on the product page; the Rare Carat setting does not state how its black accents were made black.
- GIA warns that the fractures and inclusions in black diamonds can make them more brittle and prone to chipping if struck sharply.
- GIA advises against ultrasonic and steam cleaning for black diamonds and recommends mild soap, water and a soft brush.
- A GIA report can confirm whether a black diamond’s color is natural or the result of treatment, and none of the four listings here mentions one.
Black Diamond Engagement Rings Compared
The price column is what each listing showed on 6 November 2026. The three Angara prices include the black diamond at the size and quality stated. The Rare Carat price is for the setting alone, so the center stone is a separate purchase.
| Ring | Price range | Complete ring or setting | Treatment, per the listing | Metals offered | Returns, per the jeweler |
|---|---|---|---|---|---|
| $881 | Complete ring: the black diamond is included | Irradiated, stated on the listing | 14K white gold is the only metal offered | 30 days, extended to January 15, 2027 for orders placed October 16 to December 15, 2026, per Angara | |
Angara Round Enhanced Black Diamond Solitaire Ring with Heart CarvingBest with metal detail | $998 | Complete ring: the black diamond is included | Irradiated, stated on the listing | 14K white gold is the only metal offered | 30 days, extended to January 15, 2027 for orders placed October 16 to December 15, 2026, per Angara |
Angara Princess-Cut Enhanced Black Diamond Solitaire RingBest princess cut | $1,115 | Complete ring: the black diamond is included | Irradiated, stated on the listing | 14K white gold is the metal shown | 30 days, extended to January 15, 2027 for orders placed October 16 to December 15, 2026, per Angara |
Rare Carat Spectra Black Diamond Engagement RingBest with a white center | $985 | Setting only: add a center stone | Not stated on the listing | 14K and 18K white, yellow and rose gold, and platinum | Returns until January 15, 2027 for holiday orders; one free resize in the first year, per Rare Carat |
Price ranges from the makers' sites, checked 6 November 2026. Prices change; the maker's site has the current one.
Angara showed a 10% discount next to each price and Rare Carat a crossed-out comparison value. We quote only the price shown, never the comparison value or the saving.
The Best Black Diamond Engagement Rings, Reviewed
Best overall
Angara Prong-Set Enhanced Black Diamond Solitaire Ring
by Angara
Best for: A buyer who wants a black center stone at a complete-ring price, with the treatment written on the page.
Angara says "Secured in a six-prong setting is a round enhanced black diamond that looks bold and majestic" and lists the enhancement as "Irradiated".
Illustration of the setting type, not a photo of this ring.
What we like
- The price includes the black diamond, so there is no second purchase to add
- The listing names the treatment, irradiation, instead of leaving it out
- Five stone sizes from 2/3 ct to 4 ct on the same design
Keep in mind
- Only one metal, 14K white gold
- No band width is published
- Six prongs and a raised center sit higher than a bezel would
- Price range
- $881, complete ring, 7/8 ct, Better quality, 14K white gold (checked 2026-11-06)
- Material
- 14K white gold; complete ring with a 7/8 ct round black diamond
- Widths
- Not stated on the listing
- Sizes
- 3 to 15 in quarter sizes
- Guarantee
- 30-day returns with free return shipping; extended holiday window to January 15, 2027, per Angara
Best with metal detail
Angara Round Enhanced Black Diamond Solitaire Ring with Heart Carving
by Angara
Best for: Someone who wants the black stone softened by a romantic detail in the metal rather than a plain shank.
Angara says "The lustrous shoulders are carved with dainty hearts that infuse more exquisiteness into this black diamond solitaire ring".
Illustration of the setting type, not a photo of this ring.
What we like
- Carved hearts on the shoulders give the plain solitaire a detail the eye catches up close
- Complete-ring price with the stone included
- Two quality grades, Good and Better, are offered on the same listing
Keep in mind
- Costs more than the six-prong pick at the same stone size and grade
- Carved grooves collect dirt and need a soft brush now and then
- Four prongs on a black stone leave its edges exposed to knocks
- Price range
- $998, complete ring, 7/8 ct, Better quality, 14K white gold (checked 2026-11-06)
- Material
- 14K white gold; complete ring with a 7/8 ct round black diamond
- Widths
- Not stated on the listing
- Sizes
- Not stated in the text we read
- Guarantee
- 30-day returns with free return shipping; extended holiday window to January 15, 2027, per Angara
Best princess cut
Angara Princess-Cut Enhanced Black Diamond Solitaire Ring
by Angara
Best for: A buyer who wants a square black stone with a geometric, modern look.
Angara describes "The princess-cut enhanced black diamond, held in a four-prong setting" and lists the enhancement as "Irradiated".
Illustration of the setting type, not a photo of this ring.
What we like
- Six stone sizes, from 1/3 ct to 3 3/4 ct
- The square outline reads more graphic than a round black stone
- Treatment stated on the listing
Keep in mind
- Four pointed corners are the most exposed part of any princess stone, and GIA warns black diamonds can chip if struck sharply
- Only 14K white gold is shown
- The highest price of the three Angara picks at the sizes we priced
- Price range
- $1,115, complete ring, 1 1/6 ct, Better quality, 14K white gold (checked 2026-11-06)
- Material
- 14K white gold; complete ring with a 1 1/6 ct princess black diamond
- Widths
- Not stated on the listing
- Sizes
- Not stated in the text we read
- Guarantee
- 30-day returns with free return shipping; extended holiday window to January 15, 2027, per Angara
Best with a white center
Rare Carat Spectra Black Diamond Engagement Ring
by Rare Carat
Best for: A buyer who wants black in the ring but a white diamond, lab or natural, in the center.
Rare Carat says "Bold black diamonds trace the band with striking contrast, meeting a secure gallery basket holding the center diamond".
Illustration of the setting type, not a photo of this ring.
What we like
- Seven metal options, the widest choice on this page
- A matching contoured band with black diamonds is sold for it
- You choose the center stone, lab or natural, and its size
Keep in mind
- The listing gives no count, weight or treatment for the black diamonds
- The price is for the setting only, so the center stone is extra
- Platinum costs $220 more than 14K white gold
- Price range
- $985, setting only, 14K white gold (checked 2026-11-06); $975 in 14K yellow or rose gold, $1,205 in platinum
- Material
- 14K white gold setting; center stone not included
- Widths
- Not stated in the text we read
- Sizes
- Not stated in the text we read
- Guarantee
- Returns until January 15, 2027 for holiday orders; one free resize in year one, per Rare Carat
How We Chose
- The treatment had to be named, or its absence flagged. A black center stone made the list only if the listing states what was done to it. The Rare Carat setting is the exception, and it is in because its black stones are accents, not the center; we say plainly that the listing does not state their treatment.
- Complete prices where we could get them. A black diamond center is usually sold with the ring, so three of the four prices include the stone. That makes them easier to compare with a full ring elsewhere than a setting price would be.
- Jewelers from our approved list. The picks are from Angara and Rare Carat. Other stores sell black diamond rings; they are not ranked lower, they are simply not on our list.
- Nothing bought or handled. Every detail comes from the product pages as read on 6 November 2026.
- One stone size for comparison. The round Angara picks are priced at 7/8 ct in the Better grade, the size the listing opens on. The princess pick opens at 1 1/6 ct, and its price is for that size.
What a Black Diamond Actually Is
A black diamond is a real diamond, and it is still carbon, but it does not behave like the white stones it is often compared with. Light does not pass through it, so it does not sparkle the way a colorless diamond does, and the reason it is black changes how you should treat it.
Natural Black Diamonds
GIA’s 2026 guide says most natural black diamonds get their dark appearance from countless tiny mineral inclusions. Those inclusions are what absorb the light. A naturally black diamond is far less common than a treated one, and none of the picks on this page claims to be natural.
Treated Black Diamonds
GIA names two treatments. High-temperature annealing heats the diamond without high pressure, and irradiation, in GIA’s words, alters the diamond’s crystal structure. Angara lists its stones as irradiated. GIA says treated black diamonds are far more common and widely available than naturally black ones, which is why a black diamond engagement ring at these prices is almost certain to be treated.
Treatment is not a defect, and it is not a reason to avoid the stone. It is a fact the seller should disclose and you should know before you pay, because it is part of what the stone is.
| Type | How it turns black (GIA, 2026) | What to ask the seller | Picks here |
|---|---|---|---|
| Natural black diamond | Countless tiny mineral inclusions | A grading report confirming natural color | None |
| Irradiated black diamond | Irradiation alters the crystal structure | Whether the listing or invoice names the treatment | All three Angara rings |
| Annealed black diamond | Heated at high temperature without high pressure | Same as above | None stated |
| Black accents, treatment not stated | Not stated by the listing | Ask in writing before you buy | Rare Carat Spectra |
How to Confirm What You Are Buying
GIA says its report can confirm whether a black diamond’s color is natural or the result of treatment, and that it is important to know whether your stone was treated before you make your purchase. None of the four listings we read mentions a grading report for the black stones. For a treated stone sold at these prices, the listing’s own disclosure is what you have; if natural color is the reason you would pay more, ask for a report first.
Black Diamonds and Daily Wear
The same inclusions that make a black diamond black also change how it wears, and GIA is specific about it.
The Chipping Risk
GIA says black diamonds share the remarkable hardness common to all diamonds, but often contain hundreds or even thousands of microscopic fractures and inclusions. That, in GIA’s words, can make the stone more brittle and prone to chipping or breaking if struck sharply. Hardness resists scratching; it does not stop a stone from chipping when it hits a door frame at the wrong angle.
Choosing a Setting That Protects It
A setting that covers the edges of the stone does more for a black diamond than for a white one. Our guide to the bezel setting explains how a rim of metal protects the girdle. Among the picks here, the princess cut is the most exposed, because its four corners are its thinnest points. The two round picks spread knocks more evenly, and six prongs hold more of the edge than four. If you work with your hands, our page on low profile engagement rings covers settings that sit closer to the finger.
Cleaning
GIA advises skipping ultrasonic or steam cleaning methods for black diamonds and using mild soap and water with a soft brush or cloth instead. It also recommends avoiding hard impacts and having settings checked regularly. That is gentler than the routine many people use on a white diamond, so read our guide on how to clean an engagement ring with that one change in mind.
Black Diamond vs Black Gemstones That Look Like It
A black stone in a ring is not always a diamond. GIA’s 2026 guide names four common look-alikes, and two of them are much softer.
| Black stone | What GIA says about it (2026) | Main difference from a black diamond |
|---|---|---|
| Black diamond | Shares the hardness of all diamonds, but inclusions can make it brittle | The reference stone |
| Black cubic zirconia | About 8 to 8.5 on the Mohs scale, much softer than diamond | Scratches more easily |
| Black moissanite | Generally opaque, with a deep, rich black color | A different mineral, not a diamond |
| Black spinel | A vitreous, glass-like luster and deep black color | A different luster |
| Black onyx | Around 6.5 to 7 on the Mohs scale | Much softer, and scratches in daily wear |
Mohs figures in this table are GIA’s for the minerals, not measurements of a finished ring. If a listing says only “black stone” or “black gem,” ask which of these it is. Our guide to diamond alternatives compares the clear versions of these stones.
What a Black Diamond Engagement Ring Costs
GIA says black diamonds are often more affordable than traditional colorless diamonds, and that lower overall demand keeps their prices more modest compared with top-grade colorless stones. The listings bear that out at the sizes we priced.
Complete Rings
The three Angara rings ran from $881 to $1,115 on 6 November 2026, each with the black diamond included, at 7/8 ct for the round stones and 1 1/6 ct for the princess. Each listing offers larger stones too, up to 4 ct on the round designs and 3 3/4 ct on the princess. For what a white diamond of a similar size costs, see our guide to diamond ring prices by carat.
A Setting With Black Accents
The Rare Carat Spectra costs from $975 to $1,250 for the setting alone across its seven metals, and the white center stone is extra. That puts it in a different budget from the Angara rings: the black is a detail, and most of the money goes on the center stone you add.
Which Black Diamond Engagement Ring Fits You?
| If you want | Pick | Why |
|---|---|---|
| The simplest black solitaire | Angara Prong-Set Enhanced Black Diamond Solitaire | Six prongs and a knife-edge shank, 881 dollars complete |
| A romantic detail in the metal | Angara Round Enhanced Black Diamond with Heart Carving | Carved hearts on the shoulders, 998 dollars complete |
| A square, graphic stone | Angara Princess-Cut Enhanced Black Diamond Solitaire | Princess cut at 1 1/6 ct, 1,115 dollars complete |
| Black in the ring, white in the center | Rare Carat Spectra | Black diamonds along the band, setting from 975 dollars |
| A black diamond wedding band to match | See our black wedding bands | Bands set with black diamonds are covered there |
All prices in this table were read on 6 November 2026. If you are looking for a band set with black diamonds rather than an engagement ring, our page on black wedding bands compares them with ceramic, tungsten and zirconium, and our unique engagement rings page has other colored-stone ideas.
Frequently Asked Questions
Are Black Diamonds Real Diamonds?
Yes, a black diamond is a real diamond. GIA says it shares the hardness of all diamonds, and most natural ones owe their color to countless tiny mineral inclusions. Most black diamonds sold today are treated, by irradiation or high-temperature annealing, which changes the color but not what the stone is made of.
Is a Black Diamond Engagement Ring a Good Choice for Men?
It can be, and nothing in the listings here is sold as women’s only. The six-prong Angara ring is offered up to size 15 in quarter sizes, which covers most men’s fingers. For a man who works with his hands, choose a round stone or a bezel, because GIA warns black diamonds can chip when struck sharply.
Can You Get a Black Diamond Wedding Ring Set?
Yes. Rare Carat sells the Spectra with a matching contoured band set with black diamonds, listed under $700 on 6 November 2026. The Angara solitaires are sold alone, so a matching band means choosing one separately. A straight band sits beside a plain solitaire; a contoured one follows a setting that rises at the center.
Do Black Diamonds Cost More Than White Diamonds?
Usually not. GIA writes that black diamonds are often more affordable than traditional colorless diamonds, because lower demand keeps prices modest. A naturally colored black diamond with a report is a different case, and can cost more than a treated one, but none of the rings we priced is sold as natural.
Sources
- Angara, Prong-Set Enhanced Black Diamond Solitaire Ring (SR0647BKD), accessed 06/11/2026.
- Angara, Round Enhanced Black Diamond Solitaire Ring with Heart Carving (SR0650BKD), accessed 06/11/2026.
- Angara, Princess-Cut Enhanced Black Diamond Solitaire Ring (SR0648BKD), accessed 06/11/2026.
- Rare Carat, Spectra Black Diamond Engagement Ring, setting, accessed 06/11/2026.
- GIA 4Cs, Black Diamond Buying Guide: What You Need to Know, 16/01/2026.