0.5 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 0.5 carat marquise lab grown diamonds usually range from $208 to $1,033, with an average price of $318.In the last month, prices for these diamonds are down 3.4%.Compare 1,459 verified listings across 6 retailers tracked by CaratRadar.
0.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,459 verified 0.5-carat marquise lab grown diamonds listed across 6 online retailers. Prices in this segment range from $208 to $1,033, with an average asking price of $318 and a median of $295.
The price spread of $825 (79.9% from highest to lowest) highlights why comparing identical certified diamonds across multiple retailers matters. Two identical certified diamonds can differ by hundreds or even thousands of dollars depending on the retailer.
These figures are based on our latest daily market data, matched by certification lab and certificate number across retailers, so you are comparing the exact same diamond.
1,459 diamonds tracked in this segment
Price range: $208 to $1,033
Average price: $318
Median price: $295
Available across 6 retailers
Savings potential: up to 79.9%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
1,459
$208
$318
$295
$1,033
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Very Good
From $294
Compare at $441
IGISave 41.5%0.46ct | Marquise | D | VVS1 | Very Good
From $315
Compare at $539
IGISave 88.4%0.46ct | Marquise | F | VVS2 | Ideal
From $255
Compare at $2,198
IGISave 67.7%0.46ct | Marquise | D | VVS2 | Ideal
From $276
Compare at $856
IGISave 41.6%0.46ct | Marquise | D | VVS2 | Ideal
From $288
Compare at $492
IGISave 41.5%0.46ct | Marquise | D | VVS1 | Ideal
From $315
Compare at $539
IGISave 35.7%0.46ct | Marquise | E | VVS2 | Ideal
From $234
Compare at $364
IGISave 40.4%0.46ct | Marquise | E | VS2 | Ideal
From $244
Compare at $410
IGISave 24.8%0.46ct | Marquise | D | VS1 | Ideal
From $224
Compare at $298
IGISave 38.3%0.46ct | Marquise | D | VVS2 | Excellent
From $226
Compare at $366
IGISave 49.2%0.46ct | Marquise | D | VVS2 | Very Good
From $226
Compare at $445
IGISave 38.3%0.46ct | Marquise | D | VVS2 | Very Good
From $226
Compare at $366
IGISave 51.5%0.46ct | Marquise | G | VS1 | Ideal
From $310
Compare at $640
IGISave 63%0.46ct | Marquise | D | VVS2 | Very Good
From $289
Compare at $783
IGISave 26.3%0.46ct | Marquise | D | VVS2 | Ideal
From $288
Compare at $390
IGISave 25%0.46ct | Marquise | F | VS1 | Very Good
From $292
Compare at $389
IGISave 40.9%0.46ct | Marquise | E | VVS2 | Ideal
From $234
Compare at $396
IGISave 33.3%0.46ct | Marquise | E | VVS2 | Ideal
From $288
Compare at $432
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $441
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $441
IGISave 33.6%0.46ct | Marquise | D | VS1 | Ideal
From $284
Compare at $428
IGISave 41.5%0.46ct | Marquise | D | VVS1 | Ideal
From $315
Compare at $539
IGISave 41.5%0.46ct | Marquise | D | VVS1 | Ideal
From $315
Compare at $539
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $441
IGISave 42.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $510
IGISave 33.6%0.46ct | Marquise | D | VS1 | Ideal
From $284
Compare at $428
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $441
IGISave 33.6%0.46ct | Marquise | D | VS1 | Ideal
From $284
Compare at $428
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $441
IGISave 33.6%0.46ct | Marquise | D | VS1 | Ideal
From $284
Compare at $428
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $441
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $441
IGISave 33.6%0.46ct | Marquise | D | VS1 | Ideal
From $284
Compare at $428
IGISave 53.9%0.46ct | Marquise | E | VS1 | Very Good
From $259
Compare at $563
IGISave 33.3%0.46ct | Marquise | E | VVS2 | Ideal
From $288
Compare at $432
IGISave 41.5%0.46ct | Marquise | D | VVS1 | Ideal
From $315
Compare at $539
IGISave 33.4%0.46ct | Marquise | D | VVS2 | Ideal
From $294
Compare at $441
IGISave 41.5%0.46ct | Marquise | D | VVS1 | Ideal
From $315
Compare at $539
GCAL0.46ct | Marquise | D | VS1 | Excellent
From $270
Compare at $290
IGISave 43.2%0.46ct | Marquise | D | VVS2 | Excellent
From $226
Compare at $398
IGISave 33.6%0.46ct | Marquise | D | VS1 | Ideal
From $284
Compare at $428
IGISave 38%0.46ct | Marquise | D | VS1 | Excellent
From $227
Compare at $366
IGISave 41.1%0.46ct | Marquise | D | VVS1 | Ideal
From $378
Compare at $642
IGISave 55.3%0.46ct | Marquise | D | VS1 | Ideal
From $234
Compare at $523
IGISave 41.6%0.46ct | Marquise | E | VVS1 | Good
From $280
Compare at $480
IGISave 63.1%0.46ct | Marquise | E | VVS2 | Very Good
From $288
Compare at $779
IGISave 38%0.46ct | Marquise | D | VS1 | Excellent
From $227
Compare at $366
IGISave 45.8%0.46ct | Marquise | D | VVS1 | Ideal
From $286
Compare at $528
IGISave 46%0.46ct | Marquise | D | VS1 | Very Good
From $227
Compare at $420
IGISave 14.3%0.46ct | Marquise | E | VVS2 | Very Good
From $244
Compare at $285
Entry pricing in this category starts around $208.
What to Know When Shopping for 0.5 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $825 or more.
- Focus on the 4Cs that matter most to you. Color and clarity grades drive price more than cut in many segments, but cut affects sparkle the most.
- The median price of $295 is a useful benchmark. If you see a deal significantly below this, verify the retailer's reputation and return policy.
- Consider eye-clean alternatives. Moving one clarity grade down (e.g., VS2 to SI1) can save 10-15% with no visible difference to the naked eye.
- Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
- Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
- Marquise diamonds maximize carat weight face-up and appear larger than their actual weight. Check symmetry carefully.
Frequently Asked Questions
We currently track 1,459 comparable stones in this segment. Prices start around $208 and go up to $1,033.
Based on the latest market data, the average asking price is about $318 with a median around $295.
The observed spread is roughly $825 across tracked listings, which is about 79.9% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on our data, the median price is $295, which represents the midpoint of the market. Anything below this figure from a reputable retailer is a solid deal.
We currently track this stone category across 6 online retailers, giving you a broad view of the competitive landscape.
For most buyers, color differences below G are hard to detect once set in a ring. Clarity grades of VS2 and above are typically eye-clean. Prioritize cut quality for maximum brilliance, then balance color and clarity based on your budget.
Retailer pricing strategies, overhead costs, and margin targets all contribute. The exact certified diamond can differ by $825 across sellers, which is why direct certified-diamond comparison is essential.
We match diamonds across retailers by their certification lab and certificate number. This means the prices you see are for the exact same physical diamond, not just stones with similar specs. It is a true apples-to-apples comparison.
Diamond prices fluctuate based on supply and demand. Our data refreshes regularly so you can track trends over time. Use the price range on this page as a benchmark and compare it to historical averages when available.
Diamond Terminology
- Carat
- A unit of weight for diamonds equal to 200 milligrams. Larger carat weights are exponentially rarer, which is why prices increase non-linearly with size.
- Cut
- Refers to how well a diamond's facets interact with light. Cut quality ranges from Ideal to Poor and is the single biggest factor affecting a diamond's brilliance.
- Color
- Grades a diamond's lack of color on a scale from D (colorless) to Z (light yellow). Grades D-F are considered colorless; G-J are near-colorless and offer good value.
- Clarity
- Measures the presence of internal inclusions or surface blemishes. Grades range from Flawless (FL) to Included (I3). Most inclusions in VS2 and above are invisible to the naked eye.
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