0.3 Carat Lab Grown Diamond Prices Comparison
As of May 2026, the average price of a 0.3 carat lab grown diamond is $219.0.3 carat diamonds can cost anywhere from $44 to $838 depending on shape, color, clarity, and other factors.In the last month, prices for these diamonds are down 4.7%.Compare 20,344 verified listings across 8 retailers in the tables below.
0.3 Carat Lab Grown Diamond Market Overview
CaratRadar currently tracks 20,344 verified 0.3-carat lab grown diamonds listed across 8 online retailers. Prices in this segment range from $44 to $838, with an average asking price of $219 and a median of $181.
The price spread of $794 (94.7% 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.
20,344 diamonds tracked in this segment
Price range: $44 to $838
Average price: $219
Median price: $181
Available across 8 retailers
Savings potential: up to 94.7%
Price Range Overview
As of May 28, 2026Real market range for this carat, shape, and diamond type.
20,344
$44
$219
$181
$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 46.5%IGI | 0.31ct | Emerald | G | VS1 | Very Good
From $64
Compare at $120
Save 45.4%IGI | 0.3ct | Emerald | G | VVS2 | Very Good
From $65
Compare at $119
Save 45.4%IGI | 0.3ct | Emerald | D | SI1 | Very Good
From $65
Compare at $119
Save 45.5%IGI | 0.31ct | Emerald | D | SI1 | Very Good
From $67
Compare at $123
Save 45.5%IGI | 0.31ct | Emerald | G | VVS2 | Very Good
From $67
Compare at $123
Save 45.5%IGI | 0.31ct | Emerald | D | SI1 | Very Good
From $67
Compare at $123
Save 45.4%IGI | 0.31ct | Emerald | G | VVS1 | Very Good
From $69
Compare at $126
Save 43.1%IGI | 0.31ct | Pear | G | VVS2 | Very Good
From $70
Compare at $123
Save 45.7%IGI | 0.33ct | Emerald | G | VVS2 | Very Good
From $71
Compare at $131
Save 45.7%IGI | 0.33ct | Emerald | G | VVS2 | Very Good
From $71
Compare at $131
Save 52.3%IGI | 0.3ct | Round | D | VS2 | Very Good
From $72
Compare at $151
Save 43.4%IGI | 0.34ct | Pear | G | VS2 | Very Good
From $72
Compare at $127
Save 42.5%IGI | 0.32ct | Oval | G | VVS2 | Very Good
From $73
Compare at $127
Save 44.7%IGI | 0.3ct | Round | D | SI1 | Excellent
From $74
Compare at $134
Save 45.5%IGI | 0.3ct | Emerald | E | VS2 | Very Good
From $74
Compare at $136
Save 43.4%IGI | 0.35ct | Pear | G | VS2 | Very Good
From $74
Compare at $131
Save 51.9%IGI | 0.3ct | Round | D | VS2 | Excellent
From $74
Compare at $154
Save 51.9%IGI | 0.31ct | Round | D | VS2 | Excellent
From $75
Compare at $156
Save 42.6%IGI | 0.33ct | Pear | G | VVS2 | Very Good
From $75
Compare at $131
Save 42.7%IGI | 0.34ct | Oval | G | VS1 | Very Good
From $75
Compare at $131
Save 45%IGI | 0.31ct | Round | D | SI1 | Ideal
From $76
Compare at $138
Save 45%IGI | 0.31ct | Round | D | SI1 | Ideal
From $76
Compare at $138
Save 44.5%IGI | 0.3ct | Round | E | SI1 | Ideal
From $76
Compare at $137
Save 54.2%IGI | 0.3ct | Round | D | VS2 | Very Good
From $76
Compare at $166
Save 45.4%IGI | 0.3ct | Emerald | F | VS1 | Very Good
From $76
Compare at $139
Save 45%IGI | 0.31ct | Round | D | SI1 | Excellent
From $76
Compare at $138
Save 44.9%IGI | 0.31ct | Round | E | SI1 | Excellent
From $77
Compare at $140
Save 44.9%IGI | 0.31ct | Round | E | SI1 | Excellent
From $77
Compare at $140
Save 52.2%IGI | 0.32ct | Round | D | VS2 | Very Good
From $77
Compare at $161
Save 42.8%IGI | 0.35ct | Oval | G | VS1 | Very Good
From $77
Compare at $135
Save 42.8%IGI | 0.35ct | Pear | G | VS1 | Very Good
From $77
Compare at $135
Save 42.8%IGI | 0.34ct | Pear | G | VVS2 | Very Good
From $77
Compare at $135
Save 44.5%IGI | 0.3ct | Round | D | VS1 | Excellent
From $77
Compare at $139
Save 44.9%IGI | 0.31ct | Round | E | SI1 | Excellent
From $77
Compare at $140
Save 44.8%IGI | 0.3ct | Round | D | SI1 | Excellent
From $77
Compare at $140
Save 42.1%IGI | 0.31ct | Round | E | SI1 | Excellent
From $77
Compare at $133
Save 71.1%IGI | 0.33ct | Round | E | VS2 | Ideal
From $78
Compare at $270
Save 45.2%IGI | 0.3ct | Emerald | D | VS1 | Very Good
From $78
Compare at $142
Save 45.2%IGI | 0.3ct | Emerald | F | VVS2 | Very Good
From $78
Compare at $142
Save 45.2%IGI | 0.3ct | Emerald | D | VS1 | Very Good
From $78
Compare at $142
Save 45.2%IGI | 0.3ct | Emerald | D | VS1 | Very Good
From $78
Compare at $142
Save 45.2%IGI | 0.3ct | Emerald | F | VVS2 | Very Good
From $78
Compare at $142
Save 45.2%IGI | 0.3ct | Emerald | D | VS1 | Very Good
From $78
Compare at $142
Save 44.1%IGI | 0.3ct | Round | D | SI1 | Excellent
From $78
Compare at $140
Save 44.1%IGI | 0.3ct | Round | D | SI1 | Excellent
From $78
Compare at $140
Save 44.1%IGI | 0.3ct | Round | D | SI1 | Excellent
From $78
Compare at $140
Save 54.3%IGI | 0.32ct | Pear | H | VVS2 | Very Good
From $79
Compare at $173
Save 68.4%IGI | 0.3ct | Round | D | SI1 | Ideal
From $79
Compare at $250
Save 45.2%IGI | 0.32ct | Round | E | SI1 | Ideal
From $79
Compare at $144
Save 54.3%IGI | 0.3ct | Round | D | VS2 | Excellent
From $79
Compare at $173
Entry pricing in this category starts around $44.
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 $794 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 $181 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 20,344 comparable stones in this segment. Prices start around $44 and go up to $838.
Based on the latest market data, the average asking price is about $219 with a median around $181.
The observed spread is roughly $794 across tracked listings, which is about 94.7% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $219. The median price is $181, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
We currently track this stone category across 8 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 $794 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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