0.4 Carat Marquise Lab Grown Diamond Prices Comparison
As of April 2026, 0.4 carat marquise lab grown diamonds usually range from $101 to $1,053, with an average price of $386.In the last month, prices for these diamonds are down 3.1%.Compare 1,239 verified listings across 3 retailers tracked by CaratRadar.
0.4 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,239 verified 0.4-carat marquise lab grown diamonds listed across 3 online retailers. Prices in this segment range from $101 to $1,053, with an average asking price of $386 and a median of $380.
The price spread of $952 (90.4% 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.
1,239 diamonds tracked in this segment
Price range: $101 to $1,053
Average price: $386
Median price: $380
Available across 3 retailers
Savings potential: up to 90.4%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
1,239
$101
$386
$380
$1,053
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 20%GCAL | 0.41ct | Marquise | D | VS2 | Excellent
From $200
Compare at $250
Save 41.2%GCAL | 0.41ct | Marquise | D | VS2 | Excellent
From $200
Compare at $340
Save 43.7%GCAL | 0.41ct | Marquise | E | VS2 | Excellent
From $186
Compare at $330
Save 17.8%GCAL | 0.41ct | Marquise | E | VVS1 | Excellent
From $288
Compare at $350
Save 27.5%GCAL | 0.41ct | Marquise | D | VS1 | Excellent
From $189
Compare at $260
Save 36.8%GCAL | 0.41ct | Marquise | E | SI2 | Excellent
From $196
Compare at $310
Save 36.8%GCAL | 0.41ct | Marquise | E | SI2 | Excellent
From $196
Compare at $310
IGI | 0.41ct | Marquise | I | VVS2 | Very Good
From $367
Compare at $380
Save 31.4%IGI | 0.41ct | Marquise | F | VS2 | Ideal
From $261
Compare at $380
Save 29.2%IGI | 0.41ct | Marquise | G | VS1 | Ideal
From $261
Compare at $368
Save 29.2%IGI | 0.41ct | Marquise | G | VS1 | Good
From $261
Compare at $368
Save 33.2%IGI | 0.41ct | Marquise | E | VS1 | Ideal
From $261
Compare at $390
IGI | 0.41ct | Marquise | H | VS1 | Ideal
From $367
Compare at $380
Save 29.2%IGI | 0.41ct | Marquise | G | VS1 | Ideal
From $261
Compare at $368
Save 31.4%IGI | 0.41ct | Marquise | G | VS2 | Ideal
From $261
Compare at $380
IGI | 0.41ct | Marquise | G | SI2 | Ideal
From $368
Compare at $370
Save 31.4%IGI | 0.41ct | Marquise | G | VS2 | Ideal
From $261
Compare at $380
Save 31.4%IGI | 0.41ct | Marquise | G | VS2 | Ideal
From $261
Compare at $380
IGI | 0.41ct | Marquise | G | SI2 | Ideal
From $368
Compare at $370
Save 29.2%IGI | 0.41ct | Marquise | G | VS1 | Ideal
From $261
Compare at $368
Save 29.2%IGI | 0.41ct | Marquise | G | VS1 | Ideal
From $261
Compare at $368
Save 29.5%IGI | 0.41ct | Marquise | G | SI1 | Ideal
From $261
Compare at $370
Save 31.4%IGI | 0.41ct | Marquise | G | VS2 | Ideal
From $261
Compare at $380
Save 40.1%IGI | 0.41ct | Marquise | E | VVS2 | Ideal
From $234
Compare at $390
IGI | 0.41ct | Marquise | E | VVS1 | Ideal
From $275
Compare at $295
Save 29%IGI | 0.41ct | Marquise | D | VVS2 | Very Good
From $185
Compare at $261
Save 25.9%IGI | 0.41ct | Marquise | D | VS1 | Very Good
From $185
Compare at $250
Save 47.1%IGI | 0.41ct | Marquise | D | VVS2 | Very Good
From $185
Compare at $350
Save 14.2%IGI | 0.41ct | Marquise | D | VVS2 | Ideal
From $264
Compare at $308
Save 14.2%IGI | 0.41ct | Marquise | D | VVS2 | Ideal
From $264
Compare at $308
Save 14.2%IGI | 0.41ct | Marquise | D | VVS2 | Ideal
From $264
Compare at $308
Save 14.2%IGI | 0.41ct | Marquise | D | VVS2 | Ideal
From $264
Compare at $308
Save 26.2%IGI | 0.41ct | Marquise | E | VVS1 | Ideal
From $308
Compare at $417
IGI | 0.41ct | Marquise | D | VVS1 | Ideal
From $315
Compare at $332
Save 23.4%IGI | 0.41ct | Marquise | E | VVS2 | Ideal
From $314
Compare at $410
Save 14.3%IGI | 0.41ct | Marquise | E | VVS2 | Ideal
From $255
Compare at $297
Save 30.3%IGI | 0.41ct | Marquise | D | VS2 | Ideal
From $244
Compare at $350
IGI | 0.41ct | Marquise | E | VS1 | Ideal
From $229
Compare at $246
IGI | 0.41ct | Marquise | E | VS1 | Very Good
From $229
Compare at $246
IGI | 0.41ct | Marquise | E | VS1 | Good
From $229
Compare at $246
Save 45.4%IGI | 0.41ct | Marquise | D | VS1 | Excellent
From $202
Compare at $370
Save 25.1%IGI | 0.41ct | Marquise | D | VVS2 | Ideal
From $256
Compare at $342
Save 24.8%IGI | 0.41ct | Marquise | D | VS1 | Ideal
From $193
Compare at $257
Save 25.4%IGI | 0.41ct | Marquise | D | VVS1 | Ideal
From $322
Compare at $432
Save 14.2%IGI | 0.41ct | Marquise | D | VVS2 | Ideal
From $264
Compare at $308
Save 14.3%IGI | 0.41ct | Marquise | D | VS1 | Very Good
From $202
Compare at $236
Save 14.3%IGI | 0.41ct | Marquise | E | VVS2 | Ideal
From $255
Compare at $297
Save 14.2%IGI | 0.41ct | Marquise | D | VS1 | Ideal
From $257
Compare at $300
Save 35%IGI | 0.41ct | Marquise | E | VVS2 | Ideal
From $267
Compare at $410
Save 24.7%IGI | 0.41ct | Marquise | D | VVS2 | Ideal
From $207
Compare at $275
Entry pricing in this category starts around $101.
What to Know When Shopping for 0.4 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $952 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 $380 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 1,239 comparable stones in this segment. Prices start around $101 and go up to $1,053.
Based on the latest market data, the average asking price is about $386 with a median around $380.
The observed spread is roughly $952 across tracked listings, which is about 90.4% 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 $380, 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 3 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 $952 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
0.3 Carat Marquise Lab Grown Diamond Prices
0.5 Carat Marquise Lab Grown Diamond Prices
0.2 Carat Marquise Lab Grown Diamond Prices
0.6 Carat Marquise Lab Grown Diamond Prices
0.7 Carat Marquise Lab Grown Diamond Prices
0.8 Carat Marquise Lab Grown Diamond Prices
0.9 Carat Marquise Lab Grown Diamond Prices
0.4 Carat Round Lab Grown Diamond Prices
0.4 Carat Pear Lab Grown Diamond Prices
0.4 Carat Emerald Lab Grown Diamond Prices
0.4 Carat Oval Lab Grown Diamond Prices
0.4 Carat Radiant Lab Grown Diamond Prices
Tracking Lab Grown inventory for 0.4 carat Marquise diamonds.