Half Carat Diamond (0.50ct)
Our Collection
Browse Our Half Carat Diamonds
Hand-picked certified half carat diamonds from our current stock — at prices up to 75% below retail.
Size guide
How Big Is a Half Carat Diamond?
A well-cut 0.50 carat round brilliant diamond measures approximately 5.2mm in diameter — roughly the size of a small pencil eraser. While half a carat may sound modest, a diamond of this weight offers a beautiful presence on the finger, especially with the right cut quality and setting style.
It's important to understand that carat measures weight, not physical size. A deeply-cut 0.50ct diamond can appear smaller than a well-proportioned one, because more weight is hidden in the pavilion (bottom) of the stone. This is why cut quality matters more than raw carat weight when it comes to visual impact.
* Measurements refer to round brilliant cut diamonds with ideal proportions. Accuracy depends on your screen's pixel density — use the ruler to verify.
Notice that a 1.00ct diamond is twice the weight of a 0.50ct, but only about 25% larger in diameter (6.5mm vs 5.2mm). This is because weight increases cubically — much of the extra carat mass is distributed into the diamond's depth, not its visible face-up area. This optical relationship is exactly why half carat diamonds punch well above their weight visually.
Pricing
What Does a 0.50ct Diamond Cost?
| Colour | Clarity | Cut | Diamantwerp | Typical Retail |
|---|---|---|---|---|
| D | VVS1 | Excellent | €2,200 | €6,500 |
| F | VS1 | Excellent | €1,400 | €4,200 |
| G | VS2 | Excellent | €1,200 | €3,500 |
| H | SI1 | Very Good | €750 | €2,200 |
| I | SI1 | Very Good | €550 | €1,600 |
The highlighted row (G / VS2 / Excellent) represents the sweet spot — it's the combination most of our customers choose. At this grade, any colour tint is invisible to the naked eye, inclusions can't be seen without 10× magnification, and the excellent cut ensures maximum sparkle. All at a price that's a fraction of what you'd pay elsewhere.
Prices are indicative and updated regularly. See our full diamond price guide →
Expert pick
Best Value: Our Recommendation
Our diamond experts have seen thousands of half carat stones come through Antwerp. Here's the combination that consistently delivers the best balance of beauty, sparkle, and value:
The Diamantwerp Sweet Spot
For a half carat diamond, we recommend prioritising cut quality above all else. A smaller diamond with an Excellent cut will outperform a larger diamond with a mediocre cut every single time. At 0.50ct, you can afford to go slightly lower on colour and clarity without any visible impact — and redirect that budget towards a superior cut.
Prioritize Cut
An Excellent cut maximises brilliance and makes the diamond appear larger than its carat weight.
Save on Colour
At 0.50ct, G–H colour is visually identical to D–E when viewed face-up, but costs 30–40% less.
Eye-Clean Clarity
VS2 and even SI1 are reliably eye-clean at this size. No one sees inclusions without a loupe.
Shape Guide
Best Shapes for a Half Carat Diamond
The shape of your diamond affects how large it appears face-up. Elongated shapes like oval, marquise, and pear have a larger surface area than round or princess cuts at the same carat weight — making them appear bigger for the same price.
For maximum visual impact at 0.50ct, consider an oval or pear shape. Their elongated profile covers more finger area while costing 15–20% less than an equivalent round. If classic brilliance is your priority, the round brilliant remains the gold standard for light performance.
Explore all shapes: Diamond Shapes Overview →
Expert Advice
Buying Tips for Half Carat Diamonds
Look just above or below the magic weight. Diamond prices jump at popular carat benchmarks (0.50, 1.00, 1.50). A 0.48ct or 0.53ct diamond can offer identical visual size at a noticeably lower price per carat.
Choose your setting wisely. A halo setting surrounds your half carat centre stone with tiny accent diamonds, creating the illusion of a much larger diamond. A bezel or tension setting maximises light exposure and makes the stone appear to float — both excellent choices for 0.50ct diamonds.
Always insist on certification. Every diamond at Diamantwerp comes with an independent grading report from GIA, HRD Antwerp, or IGI. This guarantees you know exactly what you're paying for — no guesswork, no inflated grades.
Consider fluorescence. A diamond with faint to medium blue fluorescence can appear slightly whiter in natural light, especially in lower colour grades (G–I). This is a legitimate way to get better perceived colour for less money. Our experts can help you identify stones where fluorescence is a positive trait.
Buy from the source. Antwerp handles over 80% of the world's rough diamond trade. By buying directly from Antwerp's diamond district — rather than through multiple middlemen — you skip the markups. Learn about our heritage →
Explore more
Other Carat Weights
Compare sizes and prices across our most popular carat weights
FAQ
Frequently Asked Questions
How much does a half carat diamond cost?
A half carat (0.50ct) diamond at Diamantwerp costs between €500 and €2,500, depending on the combination of cut quality, colour grade, and clarity. The most popular combination — G colour, VS2 clarity, Excellent cut — averages around €1,200. That's up to 70% less than you'd pay at a typical high-street jeweller for the same certified stone.
How big is a half carat diamond?
A well-cut 0.50 carat round brilliant diamond measures approximately 5.2mm in diameter — about the width of a small pencil eraser. The exact dimensions vary depending on the diamond's shape and cut proportions. Elongated shapes like oval and pear can appear noticeably larger face-up at the same carat weight.
Is a half carat diamond too small for an engagement ring?
Not at all. Half carat diamonds are one of the most popular sizes for engagement rings, particularly in Europe where the average diamond weight is 0.5–0.6 carats. A well-cut 0.50ct stone with the right setting — such as a halo or bezel mount — can look absolutely stunning. The key is prioritising cut quality to maximise brilliance and visual presence..
What is the best colour and clarity for a half carat diamond?
For a 0.50ct diamond, we recommend G–H colour and VS2–SI1 clarity. At this size, any slight colour tint is virtually invisible to the naked eye, and small inclusions cannot be detected without 10× magnification. This lets you allocate more of your budget toward a superior cut — which has the single greatest impact on a diamond's sparkle and beauty.
Are Diamantwerp's half carat diamonds certified?
Yes. Every diamond we sell comes with an independent grading report from GIA, HRD Antwerp, or IGI — the world's three most respected diamond laboratories. Each certificate details the exact 4C grades, measurements, proportions, and any laser inscription. This gives you complete confidence in what you're purchasing.
