0.3 Carat Lab Grown Diamond Prices Comparison
As of April 2026, the average price of a 0.3 carat lab grown diamond is $274.0.3 carat diamonds can cost anywhere from $100 to $838 depending on shape, color, clarity, and other factors.In the last month, prices for these diamonds are down 0.2%.Compare 8,806 verified listings across 6 retailers in the tables below.
0.3 Carat Lab Grown Diamond Market Overview
CaratRadar currently tracks 8,806 verified 0.3-carat lab grown diamonds listed across 6 online retailers. Prices in this segment range from $100 to $838, with an average asking price of $274 and a median of $233.
The price spread of $738 (88.0% 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.
8,806 diamonds tracked in this segment
Price range: $100 to $838
Average price: $274
Median price: $233
Available across 6 retailers
Savings potential: up to 88.0%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
8,806
$100
$274
$233
$838
Price History
Price Comparison Matrix
0.3 Carat Lab Grown Diamond Prices by Shape
Shape-level averages for this carat and type. Open each shape page for full market detail.
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 28.6%IGI | 0.3ct | Asscher | D | VVS1 | Ideal
From $221
Compare at $310
Save 37.7%IGI | 0.3ct | Asscher | D | VS1 | Very Good
From $181
Compare at $290
Save 30.6%IGI | 0.3ct | Asscher | E | IF | Ideal
From $229
Compare at $330
Save 37.7%IGI | 0.3ct | Asscher | D | VS1 | Very Good
From $181
Compare at $290
Save 33.2%IGI | 0.3ct | Asscher | D | VVS2 | Fair
From $200
Compare at $300
Save 33.2%IGI | 0.3ct | Asscher | D | VVS2 | Good
From $200
Compare at $300
Save 33.2%IGI | 0.3ct | Asscher | D | VVS2 | Good
From $200
Compare at $300
Save 39.6%IGI | 0.3ct | Asscher | D | VS2 | Good
From $169
Compare at $280
Save 33.2%IGI | 0.3ct | Asscher | D | VVS2 | Good
From $200
Compare at $300
Save 37.7%IGI | 0.3ct | Asscher | D | VS1 | Very Good
From $181
Compare at $290
Save 31%IGI | 0.31ct | Asscher | D | VVS2 | Good
From $207
Compare at $300
Save 30.9%IGI | 0.31ct | Asscher | D | IF | Very Good
From $235
Compare at $340
Save 26.2%IGI | 0.31ct | Asscher | D | VVS1 | Very Good
From $229
Compare at $310
Save 30.4%IGI | 0.31ct | Asscher | D | IF | Ideal
From $237
Compare at $340
Save 35.6%IGI | 0.31ct | Asscher | D | VS1 | Very Good
From $187
Compare at $290
Save 26.2%IGI | 0.31ct | Asscher | D | VVS1 | Good
From $229
Compare at $310
Save 36.2%IGI | 0.31ct | Asscher | E | VS1 | Fair
From $185
Compare at $290
Save 31%IGI | 0.31ct | Asscher | D | VVS2 | Good
From $207
Compare at $300
Save 34.9%IGI | 0.31ct | Asscher | E | VVS2 | Very Good
From $195
Compare at $300
Save 34.9%IGI | 0.31ct | Asscher | D | VS1 | Very Good
From $195
Compare at $300
Save 26.3%IGI | 0.32ct | Asscher | D | VVS1 | Ideal
From $236
Compare at $320
Save 32.6%IGI | 0.32ct | Asscher | D | IF | Ideal
From $242
Compare at $360
Save 32.6%IGI | 0.32ct | Asscher | D | IF | Ideal
From $242
Compare at $360
Save 32.6%IGI | 0.32ct | Asscher | D | IF | Very Good
From $242
Compare at $360
Save 37.4%IGI | 0.32ct | Asscher | E | VS1 | Very Good
From $188
Compare at $300
Save 35%IGI | 0.32ct | Asscher | D | VS1 | Excellent
From $201
Compare at $310
Save 28.3%IGI | 0.32ct | Asscher | D | VVS2 | Good
From $222
Compare at $310
Save 35.8%IGI | 0.32ct | Asscher | D | VS1 | Very Good
From $193
Compare at $300
Save 31.1%IGI | 0.32ct | Asscher | D | VVS2 | Good
From $213
Compare at $310
Save 41%IGI | 0.32ct | Asscher | F | VS2 | Very Good
From $171
Compare at $290
Save 36.3%IGI | 0.32ct | Asscher | E | VS1 | Fair
From $191
Compare at $300
Save 38.2%IGI | 0.32ct | Asscher | E | VVS1 | Ideal
From $204
Compare at $330
Save 46.2%IGI | 0.32ct | Asscher | E | VVS2 | Ideal
From $167
Compare at $310
Save 31.2%IGI | 0.33ct | Asscher | D | VVS2 | Very Good
From $220
Compare at $320
Save 33%IGI | 0.33ct | Asscher | D | VS1 | Excellent
From $208
Compare at $310
Save 31.2%IGI | 0.33ct | Asscher | D | VVS2 | Very Good
From $220
Compare at $320
Save 26.3%IGI | 0.33ct | Asscher | E | VVS1 | Excellent
From $243
Compare at $330
Save 31.2%IGI | 0.33ct | Asscher | D | VVS2 | Good
From $220
Compare at $320
Save 31.2%IGI | 0.33ct | Asscher | D | VVS2 | Good
From $220
Compare at $320
Save 36%IGI | 0.33ct | Asscher | D | VS1 | Very Good
From $199
Compare at $310
Save 24%IGI | 0.33ct | Asscher | D | VVS1 | Very Good
From $251
Compare at $330
Save 35.5%IGI | 0.33ct | Asscher | F | VVS2 | Very Good
From $194
Compare at $300
Save 31.2%IGI | 0.33ct | Asscher | D | VVS2 | Ideal
From $220
Compare at $320
IGI | 0.33ct | Asscher | D | VS1 | Ideal
From $169
Compare at $320
Save 31.2%IGI | 0.33ct | Asscher | D | VVS2 | Ideal
From $220
Compare at $320
Save 29.2%IGI | 0.34ct | Asscher | D | VVS2 | Ideal
From $227
Compare at $320
Save 34.1%IGI | 0.34ct | Asscher | D | VS1 | Very Good
From $204
Compare at $310
Save 44%IGI | 0.34ct | Asscher | E | VS2 | Ideal
From $174
Compare at $310
Save 26.3%IGI | 0.34ct | Asscher | D | VVS1 | Ideal
From $251
Compare at $340
Save 29.2%IGI | 0.34ct | Asscher | D | VVS2 | Ideal
From $227
Compare at $320
Entry pricing in this category starts around $100.
What to Know When Shopping for 0.3 Carat Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $738 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 $233 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.
Frequently Asked Questions
We currently track 8,806 comparable stones in this segment. Prices start around $100 and go up to $838.
Based on the latest market data, the average asking price is about $274 with a median around $233.
The observed spread is roughly $738 across tracked listings, which is about 88.0% 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 $233, 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 $738 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.
0.2 Carat Lab Grown Diamond Prices
0.3 Carat Round Lab Grown Diamond Prices
0.3 Carat Pear Lab Grown Diamond Prices
0.3 Carat Emerald Lab Grown Diamond Prices
0.3 Carat Oval Lab Grown Diamond Prices
0.3 Carat Princess Lab Grown Diamond Prices
0.3 Carat Asscher Lab Grown Diamond Prices
0.3 Carat Radiant Lab Grown Diamond Prices
0.3 Carat Heart Lab Grown Diamond Prices
0.3 Carat Marquise Lab Grown Diamond Prices
Tracking Lab Grown inventory for 0.3 carat all-shape diamonds.