0.3 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 0.3 carat marquise lab grown diamonds usually range from $141 to $690, with an average price of $235.In the last month, prices for these diamonds are down 1.9%.Compare 736 verified listings across 2 retailers tracked by CaratRadar.
0.3 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 736 verified 0.3-carat marquise lab grown diamonds listed across 2 online retailers. Prices in this segment range from $141 to $690, with an average asking price of $235 and a median of $218.
The price spread of $549 (79.5% 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.
736 diamonds tracked in this segment
Price range: $141 to $690
Average price: $235
Median price: $218
Available across 2 retailers
Savings potential: up to 79.5%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
736
$141
$235
$218
$690
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 63.2%0.26ct | Marquise | D | VS1 | Good
From $165
Compare at $450
IGISave 60.5%0.26ct | Marquise | D | VVS2 | Excellent
From $168
Compare at $426
IGISave 54.3%0.26ct | Marquise | E | VS1 | Very Good
From $251
Compare at $550
IGISave 57.9%0.27ct | Marquise | D | VS1 | Ideal
From $181
Compare at $429
IGISave 56.2%0.28ct | Marquise | E | VVS2 | Very Good
From $203
Compare at $464
IGISave 66.9%0.28ct | Marquise | E | VS1 | Very Good
From $149
Compare at $449
IGISave 60.2%0.28ct | Marquise | D | VVS2 | Ideal
From $239
Compare at $601
IGISave 52.9%0.28ct | Marquise | D | VVS2 | Very Good
From $279
Compare at $592
IGISave 59.8%0.28ct | Marquise | D | VS1 | Good
From $178
Compare at $443
IGISave 52.7%0.28ct | Marquise | E | VVS2 | Very Good
From $284
Compare at $601
IGISave 57.4%0.28ct | Marquise | D | VS1 | Very Good
From $187
Compare at $440
IGISave 62%0.29ct | Marquise | E | VS1 | Very Good
From $154
Compare at $405
IGISave 55.8%0.29ct | Marquise | D | VS1 | Ideal
From $226
Compare at $511
IGISave 41.5%0.29ct | Marquise | E | VS1 | Ideal
From $185
Compare at $316
IGISave 52%0.29ct | Marquise | D | VVS2 | Ideal
From $300
Compare at $625
IGISave 52.2%0.29ct | Marquise | E | VVS2 | Very Good
From $182
Compare at $381
IGISave 58.8%0.29ct | Marquise | D | VS1 | Very Good
From $185
Compare at $449
IGISave 41.5%0.29ct | Marquise | D | VVS2 | Ideal
From $185
Compare at $316
IGISave 34.5%0.29ct | Marquise | D | VS1 | Very Good
From $206
Compare at $314
IGISave 65.1%0.29ct | Marquise | D | VVS2 | Very Good
From $167
Compare at $480
IGISave 51.5%0.29ct | Marquise | D | VS2 | Fair
From $170
Compare at $351
IGISave 52.2%0.29ct | Marquise | E | VVS2 | Very Good
From $182
Compare at $381
IGISave 34.4%0.29ct | Marquise | D | VVS2 | Very Good
From $217
Compare at $330
IGISave 33.7%0.3ct | Marquise | D | VVS1 | Very Good
From $260
Compare at $393
IGISave 40.5%0.3ct | Marquise | D | VVS2 | Very Good
From $211
Compare at $355
IGISave 34.2%0.3ct | Marquise | E | VVS1 | Very Good
From $239
Compare at $363
IGISave 33.7%0.3ct | Marquise | D | VVS1 | Very Good
From $260
Compare at $393
IGISave 42.1%0.3ct | Marquise | D | VVS2 | Very Good
From $211
Compare at $365
IGISave 42.1%0.3ct | Marquise | D | VVS2 | Very Good
From $211
Compare at $365
IGISave 43.5%0.3ct | Marquise | E | VS1 | Very Good
From $195
Compare at $345
IGISave 89.9%0.3ct | Marquise | G | VS2 | Good
From $169
Compare at $1,672
IGISave 76.3%0.3ct | Marquise | H | VVS2 | Ideal
From $400
Compare at $1,691
IGISave 75.5%0.3ct | Marquise | H | VS1 | Ideal
From $400
Compare at $1,634
IGISave 88.9%0.3ct | Marquise | G | VS1 | Ideal
From $169
Compare at $1,524
IGISave 34.4%0.3ct | Marquise | D | VVS2 | Ideal
From $211
Compare at $322
IGISave 42%0.3ct | Marquise | D | VS1 | Very Good
From $200
Compare at $345
IGISave 61.6%0.3ct | Marquise | D | VS1 | Very Good
From $214
Compare at $557
IGISave 41.8%0.3ct | Marquise | E | VS1 | Good
From $195
Compare at $335
IGISave 42%0.3ct | Marquise | D | VS1 | Good
From $200
Compare at $345
IGISave 34.4%0.3ct | Marquise | D | VVS2 | Very Good
From $211
Compare at $322
IGISave 42%0.3ct | Marquise | D | VS1 | Very Good
From $200
Compare at $345
IGISave 34.4%0.3ct | Marquise | D | VVS2 | Excellent
From $211
Compare at $322
IGISave 38%0.3ct | Marquise | E | VVS2 | Very Good
From $220
Compare at $355
IGISave 90%0.3ct | Marquise | F | VS2 | Ideal
From $169
Compare at $1,691
IGISave 88.7%0.3ct | Marquise | E | VVS2 | Ideal
From $175
Compare at $1,548
IGISave 90.2%0.3ct | Marquise | E | VS2 | Ideal
From $169
Compare at $1,726
IGISave 89.1%0.3ct | Marquise | E | VS1 | Very Good
From $169
Compare at $1,549
IGISave 89.1%0.3ct | Marquise | F | VS1 | Ideal
From $169
Compare at $1,545
IGISave 76.3%0.3ct | Marquise | H | VVS2 | Ideal
From $400
Compare at $1,691
IGISave 90.2%0.3ct | Marquise | F | VS1 | Good
From $169
Compare at $1,726
Entry pricing in this category starts around $141.
What to Know When Shopping for 0.3 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $549 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 $218 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 736 comparable stones in this segment. Prices start around $141 and go up to $690.
Based on the latest market data, the average asking price is about $235 with a median around $218.
The observed spread is roughly $549 across tracked listings, which is about 79.5% 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 $218, 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 2 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 $549 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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