0.3 Carat Heart Lab Grown Diamond Prices Comparison
As of October 2026, 0.3 carat heart lab grown diamonds in the 0.30–0.39 carat benchmark range usually range from $62 to $934, with an average price of $274.In the last month, prices for these diamonds are down 0.6%.Compare 188 verified listings across 5 retailers tracked by CaratRadar.
0.3 Carat Heart Lab Grown Diamond Market Overview
CaratRadar currently tracks 188 verified 0.3-carat heart lab grown diamonds in the 0.30–0.39 carat benchmark range, listed across 5 online retailers. Prices in this segment range from $62 to $934, with an average asking price of $274 and a median of $271.
The price spread of $872 (93.4% 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 use the same benchmark range throughout the page and 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.
188 diamonds tracked in the 0.30–0.39 carat benchmark
Price range: $62 to $934
Average price: $274
Median price: $271
Available across 5 retailers
Savings potential: up to 93.4%
Price Range Overview
As of Oct 13, 2026Real market range for this carat, shape, and diamond type.
188
$62
$274
$271
$934
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 76.7%IGI | 0.31ct | Heart | E | VS1 | Ideal
From $82
Compare at $352
Save 44.3%IGI | 0.33ct | Heart | E | VS1 | Very Good
From $83
Compare at $149
Save 44.3%IGI | 0.33ct | Heart | E | VS1 | Good
From $83
Compare at $149
Save 43%IGI | 0.33ct | Heart | F | VS1 | Very Good
From $85
Compare at $149
Save 44.3%IGI | 0.33ct | Heart | D | VS1 | Good
From $86
Compare at $155
Save 76.5%IGI | 0.31ct | Heart | D | VS1 | Ideal
From $87
Compare at $370
Save 44.3%IGI | 0.35ct | Heart | D | VS2 | Very Good
From $88
Compare at $158
Save 43.9%IGI | 0.36ct | Heart | E | VS1 | Good
From $91
Compare at $162
Save 44.1%IGI | 0.37ct | Heart | E | VS2 | Excellent
From $92
Compare at $165
Save 44.8%IGI | 0.34ct | Heart | E | VVS2 | Very Good
From $92
Compare at $167
Save 75.7%IGI | 0.33ct | Heart | E | SI1 | Good
From $93
Compare at $382
Save 44.2%IGI | 0.37ct | Heart | E | VS1 | Very Good
From $93
Compare at $167
Save 44.1%IGI | 0.36ct | Heart | D | VS1 | Good
From $94
Compare at $168
Save 43.9%IGI | 0.37ct | Heart | D | VS1 | Good
From $97
Compare at $173
Save 43.9%IGI | 0.37ct | Heart | D | VS1 | Very Good
From $97
Compare at $173
Save 75.5%IGI | 0.33ct | Heart | E | VS1 | Ideal
From $97
Compare at $396
Save 44.4%IGI | 0.36ct | Heart | E | VVS2 | Very Good
From $98
Compare at $176
Save 44.2%IGI | 0.39ct | Heart | D | VS2 | Excellent
From $98
Compare at $176
Save 38.6%IGI | 0.37ct | Heart | E | VVS2 | Very Good
From $101
Compare at $165
Save 38.3%IGI | 0.4ct | Heart | D | VS2 | Good
From $101
Compare at $164
Save 38.3%IGI | 0.4ct | Heart | D | VS2 | Very Good
From $101
Compare at $164
Save 74.9%IGI | 0.35ct | Heart | E | SI1 | Very Good
From $103
Compare at $410
Save 74.9%IGI | 0.35ct | Heart | F | VS1 | Very Good
From $103
Compare at $410
Save 74.4%IGI | 0.33ct | Heart | E | VVS2 | Very Good
From $106
Compare at $414
Save 76.7%IGI | 0.37ct | Heart | D | VS1 | Ideal
From $107
Compare at $459
Save 74.8%IGI | 0.36ct | Heart | E | VVS2 | Very Good
From $107
Compare at $425
Save 74.6%IGI | 0.37ct | Heart | D | VVS2 | Very Good
From $109
Compare at $429
Save 74.4%IGI | 0.36ct | Heart | E | VS1 | Very Good
From $109
Compare at $425
Save 74.2%IGI | 0.37ct | Heart | D | VS1 | Very Good
From $109
Compare at $423
Save 74.2%IGI | 0.37ct | Heart | E | VS1 | Ideal
From $109
Compare at $423
Save 58.5%IGI | 0.34ct | Heart | D | VS1 | Ideal
From $112
Compare at $270
Save 74%IGI | 0.38ct | Heart | D | VVS2 | Ideal
From $112
Compare at $431
Save 73.7%IGI | 0.31ct | Heart | D | VS2 | Good
From $115
Compare at $437
Save 73.7%IGI | 0.39ct | Heart | E | SI1 | Good
From $115
Compare at $438
Save 73.7%IGI | 0.39ct | Heart | E | VS1 | Very Good
From $115
Compare at $438
Save 74%IGI | 0.36ct | Heart | F | VVS2 | Very Good
From $115
Compare at $443
Save 73.6%IGI | 0.36ct | Heart | D | VS1 | Very Good
From $117
Compare at $443
Save 73.2%IGI | 0.39ct | Heart | E | VS1 | Very Good
From $118
Compare at $440
Save 73.2%IGI | 0.32ct | Heart | E | VS1 | Good
From $119
Compare at $444
Save 73.1%IGI | 0.34ct | Heart | E | VS1 | Good
From $119
Compare at $443
Save 73.3%IGI | 0.37ct | Heart | D | VS1 | Good
From $119
Compare at $446
Save 73.3%IGI | 0.37ct | Heart | E | VVS2 | Good
From $119
Compare at $446
Save 72.9%IGI | 0.4ct | Heart | D | VVS2 | Fair
From $121
Compare at $447
Save 72.9%IGI | 0.34ct | Heart | D | VS1 | Very Good
From $122
Compare at $450
Save 72.9%IGI | 0.4ct | Heart | D | VVS2 | Good
From $122
Compare at $450
Save 72.8%IGI | 0.33ct | Heart | E | VS1 | Very Good
From $123
Compare at $453
Save 72.9%IGI | 0.38ct | Heart | D | VS1 | Excellent
From $124
Compare at $458
Save 72.7%IGI | 0.34ct | Heart | D | VS2 | Very Good
From $126
Compare at $462
Save 72.7%IGI | 0.35ct | Heart | D | VS1 | Very Good
From $126
Compare at $461
Save 72.7%IGI | 0.35ct | Heart | D | VS1 | Good
From $126
Compare at $461
Entry pricing in this benchmark range starts around $62.
What to Know When Shopping for 0.3 Carat Heart Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $872 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 $271 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.
- Heart-shaped diamonds require excellent symmetry to look balanced. Aim for carat weights above 0.5 where the shape is clearly visible.
Frequently Asked Questions
We currently track 188 comparable stones in the 0.30–0.39 carat benchmark range. Prices start around $62 and go up to $934.
Based on the latest market data, the average asking price is about $274 with a median around $271.
The observed spread is roughly $872 across tracked listings, which is about 93.4% from highest to lowest offer in the 0.30–0.39 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $274. The median price is $271, 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 $872 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.
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Tracking Lab Grown inventory for the 0.30–0.39 carat Heart diamond benchmark.