0.3 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 0.3 carat radiant lab grown diamonds usually range from $161 to $420, with an average price of $247.In the last month, prices for these diamonds are down 0.6%.Compare 163 verified listings across 2 retailers tracked by CaratRadar.
0.3 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 163 verified 0.3-carat radiant lab grown diamonds listed across 2 online retailers. Prices in this segment range from $161 to $420, with an average asking price of $247 and a median of $236.
The price spread of $259 (61.6% 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.
163 diamonds tracked in this segment
Price range: $161 to $420
Average price: $247
Median price: $236
Available across 2 retailers
Savings potential: up to 61.6%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
163
$161
$247
$236
$420
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%0.25ct | Radiant | D | VS1 | Very Good
From $166
Compare at $449
IGISave 49.8%0.25ct | Radiant | E | VVS1 | Very Good
From $191
Compare at $381
IGISave 52.1%0.26ct | Radiant | E | VVS2 | Very Good
From $169
Compare at $352
IGISave 16.4%0.26ct | Radiant | D | VVS1 | Excellent
From $161
Compare at $193
IGISave 62.4%0.27ct | Radiant | D | VVS2 | Excellent
From $172
Compare at $458
IGISave 50.5%0.27ct | Radiant | E | VS1 | Very Good
From $172
Compare at $348
IGISave 52.8%0.27ct | Radiant | F | VVS2 | Excellent
From $166
Compare at $351
IGISave 61.8%0.28ct | Radiant | D | VVS2 | Excellent
From $179
Compare at $468
IGISave 49.8%0.28ct | Radiant | D | VS1 | Good
From $186
Compare at $370
IGISave 62.5%0.28ct | Radiant | E | VS1 | Excellent
From $172
Compare at $458
IGISave 61.8%0.28ct | Radiant | D | VVS2 | Excellent
From $179
Compare at $468
IGISave 51%0.28ct | Radiant | D | VVS2 | Ideal
From $190
Compare at $388
IGISave 49.8%0.28ct | Radiant | D | VS1 | Very Good
From $186
Compare at $370
IGISave 62.8%0.29ct | Radiant | D | VVS2 | Very Good
From $197
Compare at $528
IGISave 50.7%0.29ct | Radiant | D | VS2 | Very Good
From $181
Compare at $366
IGISave 50.3%0.29ct | Radiant | E | VS1 | Ideal
From $185
Compare at $372
IGISave 63.3%0.29ct | Radiant | E | VVS2 | Good
From $188
Compare at $512
IGISave 49.7%0.29ct | Radiant | D | VS1 | Very Good
From $192
Compare at $382
IGISave 50.3%0.29ct | Radiant | E | VS1 | Good
From $185
Compare at $372
IGISave 57.9%0.29ct | Radiant | D | VVS2 | Good
From $197
Compare at $467
IGISave 31.3%0.29ct | Radiant | D | VS1 | Very Good
From $192
Compare at $280
IGISave 58.5%0.29ct | Radiant | E | VVS2 | Very Good
From $188
Compare at $453
IGISave 57.1%0.3ct | Radiant | D | VVS2 | Very Good
From $206
Compare at $481
IGISave 62.6%0.3ct | Radiant | E | VVS2 | Ideal
From $199
Compare at $532
IGISave 41%0.3ct | Radiant | E | VVS1 | Very Good
From $221
Compare at $375
IGISave 75%0.3ct | Radiant | H | VS2 | Ideal
From $400
Compare at $1,603
IGISave 41.4%0.3ct | Radiant | E | VVS2 | Excellent
From $199
Compare at $339
IGISave 16.7%0.3ct | Radiant | D | VS1 | Ideal
From $280
Compare at $336
0.3ct | Radiant | D | IF | Very Good
From $310
Compare at $370
IGISave 62.1%0.3ct | Radiant | D | VVS2 | Good
From $206
Compare at $545
IGISave 41.2%0.3ct | Radiant | D | VVS2 | Excellent
From $206
Compare at $351
IGISave 33.6%0.3ct | Radiant | E | VVS1 | Excellent
From $258
Compare at $388
IGISave 41.3%0.3ct | Radiant | D | VS1 | Very Good
From $197
Compare at $336
IGISave 57.7%0.3ct | Radiant | E | VVS2 | Ideal
From $199
Compare at $470
IGISave 51.1%0.31ct | Radiant | D | VVS2 | Very Good
From $321
Compare at $656
IGISave 40.7%0.31ct | Radiant | D | VVS1 | Good
From $237
Compare at $399
IGISave 40.7%0.31ct | Radiant | D | VVS1 | Very Good
From $237
Compare at $399
IGISave 41%0.31ct | Radiant | D | VVS2 | Good
From $213
Compare at $361
IGISave 72.5%0.31ct | Radiant | H | VS2 | Ideal
From $400
Compare at $1,457
IGISave 33.4%0.31ct | Radiant | D | VVS1 | Ideal
From $282
Compare at $423
IGISave 33.4%0.31ct | Radiant | D | VVS1 | Ideal
From $282
Compare at $423
IGISave 33.9%0.31ct | Radiant | D | VVS2 | Very Good
From $251
Compare at $379
IGISave 30.8%0.31ct | Radiant | D | VS1 | Good
From $214
Compare at $310
IGISave 54.7%0.31ct | Radiant | D | VVS1 | Ideal
From $244
Compare at $539
IGISave 57.3%0.31ct | Radiant | D | VS1 | Very Good
From $204
Compare at $477
IGISave 33.4%0.31ct | Radiant | D | VVS1 | Ideal
From $282
Compare at $423
IGISave 40.7%0.31ct | Radiant | D | VVS1 | Very Good
From $237
Compare at $399
IGISave 62.3%0.31ct | Radiant | D | VS1 | Very Good
From $204
Compare at $540
IGI0.31ct | Radiant | D | VVS2 | Very Good
From $238
Compare at $260
IGISave 57.2%0.31ct | Radiant | E | VVS2 | Good
From $205
Compare at $480
Entry pricing in this category starts around $161.
What to Know When Shopping for 0.3 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $259 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 $236 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.
- Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.
Frequently Asked Questions
We currently track 163 comparable stones in this segment. Prices start around $161 and go up to $420.
Based on the latest market data, the average asking price is about $247 with a median around $236.
The observed spread is roughly $259 across tracked listings, which is about 61.6% 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 $236, 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 $259 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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