0.3 Carat Radiant Lab Grown Diamond Prices Comparison
As of May 2026, 0.3 carat radiant lab grown diamonds usually range from $81 to $824, with an average price of $300.In the last month, prices for these diamonds are down 5.1%.Compare 398 verified listings across 5 retailers tracked by CaratRadar.
0.3 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 398 verified 0.3-carat radiant lab grown diamonds listed across 5 online retailers. Prices in this segment range from $81 to $824, with an average asking price of $300 and a median of $260.
The price spread of $743 (90.2% 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.
398 diamonds tracked in this segment
Price range: $81 to $824
Average price: $300
Median price: $260
Available across 5 retailers
Savings potential: up to 90.2%
Price Range Overview
As of May 30, 2026Real market range for this carat, shape, and diamond type.
398
$81
$300
$260
$824
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 70.6%IGI | 0.4ct | Radiant | D | VS2 | Excellent
From $103
Compare at $350
Save 70.3%IGI | 0.4ct | Radiant | F | VS1 | Excellent
From $104
Compare at $350
Save 69.7%IGI | 0.4ct | Radiant | E | VS1 | Excellent
From $106
Compare at $350
Save 69.7%IGI | 0.4ct | Radiant | F | VVS2 | Ideal
From $106
Compare at $350
Save 69.7%IGI | 0.4ct | Radiant | D | VS1 | Ideal
From $109
Compare at $360
Save 68.6%IGI | 0.4ct | Radiant | E | VS2 | Excellent
From $110
Compare at $350
Save 68.9%IGI | 0.4ct | Radiant | E | VVS2 | Ideal
From $112
Compare at $360
Save 68.6%IGI | 0.4ct | Radiant | D | VVS2 | Excellent
From $113
Compare at $360
Save 68.6%IGI | 0.4ct | Radiant | D | VVS2 | Good
From $113
Compare at $360
Save 67.8%IGI | 0.4ct | Radiant | E | VVS2 | Ideal
From $116
Compare at $360
Save 67.8%IGI | 0.4ct | Radiant | E | VVS2 | Ideal
From $116
Compare at $360
Save 59.3%IGI | 0.3ct | Radiant | E | VVS2 | Ideal
From $118
Compare at $290
Save 60.7%IGI | 0.32ct | Radiant | E | VS2 | Very Good
From $118
Compare at $300
Save 59%IGI | 0.3ct | Radiant | D | VS1 | Ideal
From $119
Compare at $290
Save 59%IGI | 0.3ct | Radiant | D | VS1 | Very Good
From $119
Compare at $290
Save 60%IGI | 0.31ct | Radiant | E | VS1 | Good
From $120
Compare at $300
Save 60%IGI | 0.31ct | Radiant | E | VS1 | Ideal
From $120
Compare at $300
Save 67.6%IGI | 0.4ct | Radiant | D | VS1 | Excellent
From $122
Compare at $376
Save 59.3%IGI | 0.31ct | Radiant | E | VVS2 | Good
From $122
Compare at $300
Save 59.3%IGI | 0.31ct | Radiant | E | VVS2 | Very Good
From $122
Compare at $300
Save 39.6%IGI | 0.31ct | Radiant | D | VS1 | Very Good
From $123
Compare at $204
Save 57.6%IGI | 0.31ct | Radiant | D | VS1 | Very Good
From $123
Compare at $290
Save 45.6%IGI | 0.4ct | Radiant | D | VS1 | Ideal
From $124
Compare at $228
Save 58.7%IGI | 0.32ct | Radiant | F | VVS2 | Ideal
From $124
Compare at $300
Save 58.7%IGI | 0.32ct | Radiant | E | VS1 | Excellent
From $124
Compare at $300
Save 39.5%IGI | 0.35ct | Radiant | E | VVS2 | Very Good
From $124
Compare at $205
Save 56.6%IGI | 0.32ct | Radiant | E | VVS2 | Excellent
From $126
Compare at $290
Save 56.6%IGI | 0.32ct | Radiant | E | VVS2 | Ideal
From $126
Compare at $290
Save 59.4%IGI | 0.32ct | Radiant | E | VVS2 | Very Good
From $126
Compare at $310
Save 39.6%IGI | 0.32ct | Radiant | E | VVS2 | Good
From $126
Compare at $209
Save 57.7%IGI | 0.32ct | Radiant | E | VS1 | Ideal
From $127
Compare at $300
Save 59%IGI | 0.32ct | Radiant | D | VS1 | Ideal
From $127
Compare at $310
Save 59%IGI | 0.33ct | Radiant | F | VVS2 | Very Good
From $127
Compare at $310
Save 39.6%IGI | 0.32ct | Radiant | D | VS1 | Very Good
From $127
Compare at $210
Save 59%IGI | 0.33ct | Radiant | E | VS1 | Very Good
From $127
Compare at $310
Save 59%IGI | 0.32ct | Radiant | D | VS1 | Very Good
From $127
Compare at $310
Save 59%IGI | 0.32ct | Radiant | D | VS1 | Very Good
From $127
Compare at $310
Save 59%IGI | 0.33ct | Radiant | E | VS1 | Very Good
From $127
Compare at $310
Save 49.2%IGI | 0.32ct | Radiant | D | VS1 | Very Good
From $128
Compare at $252
Save 49.1%IGI | 0.33ct | Radiant | D | VS2 | Ideal
From $128
Compare at $252
Save 48.9%IGI | 0.31ct | Radiant | D | VVS2 | Very Good
From $128
Compare at $251
Save 49.1%IGI | 0.33ct | Radiant | D | VS2 | Ideal
From $128
Compare at $252
Save 60.9%IGI | 0.36ct | Radiant | D | VS2 | Excellent
From $129
Compare at $330
Save 57%IGI | 0.31ct | Radiant | D | VS1 | Ideal
From $129
Compare at $300
Save 48.9%IGI | 0.33ct | Radiant | E | VS1 | Ideal
From $131
Compare at $257
Save 57.7%IGI | 0.32ct | Radiant | D | VVS2 | Excellent
From $131
Compare at $310
Save 59.1%IGI | 0.34ct | Radiant | F | VVS2 | Very Good
From $131
Compare at $320
Save 56.2%IGI | 0.33ct | Radiant | D | VS1 | Very Good
From $131
Compare at $299
Save 48.9%IGI | 0.32ct | Radiant | D | VVS2 | Ideal
From $132
Compare at $259
Save 49.2%IGI | 0.33ct | Radiant | D | VS1 | Very Good
From $132
Compare at $260
Entry pricing in this category starts around $81.
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 $743 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 $260 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 398 comparable stones in this segment. Prices start around $81 and go up to $824.
Based on the latest market data, the average asking price is about $300 with a median around $260.
The observed spread is roughly $743 across tracked listings, which is about 90.2% 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 $300. The median price is $260, 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 5 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 $743 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 Radiant Lab Grown Diamond Prices
0.4 Carat Radiant Lab Grown Diamond Prices
0.5 Carat Radiant Lab Grown Diamond Prices
0.6 Carat Radiant Lab Grown Diamond Prices
0.7 Carat Radiant Lab Grown Diamond Prices
0.8 Carat Radiant Lab Grown Diamond Prices
0.9 Carat Radiant Lab Grown Diamond Prices
0.3 Carat Round Lab Grown Diamond Prices
0.3 Carat Pear Lab Grown Diamond Prices
0.3 Carat Oval Lab Grown Diamond Prices
0.3 Carat Emerald Lab Grown Diamond Prices
0.3 Carat Marquise Lab Grown Diamond Prices
Tracking Lab Grown inventory for 0.3 carat Radiant diamonds.