0.3 Carat Round Lab Grown Diamond Prices Comparison
As of April 2026, 0.3 carat round lab grown diamonds usually range from $101 to $515, with an average price of $227.In the last month, prices for these diamonds are down 1.9%.Compare 2,983 verified listings across 5 retailers tracked by CaratRadar.
0.3 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 2,983 verified 0.3-carat round lab grown diamonds listed across 5 online retailers. Prices in this segment range from $101 to $515, with an average asking price of $227 and a median of $198.
The price spread of $414 (80.4% 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 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.
2,983 diamonds tracked in this segment
Price range: $101 to $515
Average price: $227
Median price: $198
Available across 5 retailers
Savings potential: up to 80.4%
Price Range Overview
As of Apr 13, 2026Real market range for this carat, shape, and diamond type.
2,983
$101
$227
$198
$515
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 49.7%GIA | 0.3ct | Round | D | VS2 | Very Good
From $260
Compare at $516
Save 10.1%GIA | 0.3ct | Round | E | VVS2 | Excellent
From $279
Compare at $310
Save 49.7%GIA | 0.3ct | Round | D | VS1 | Excellent
From $282
Compare at $561
Save 49.6%GIA | 0.3ct | Round | E | VS1 | Excellent
From $264
Compare at $524
Save 49.6%GIA | 0.3ct | Round | D | VS1 | Excellent
From $247
Compare at $491
Save 37.5%GIA | 0.3ct | Round | D | VS2 | Very Good
From $262
Compare at $420
Save 49.6%GIA | 0.3ct | Round | D | VS1 | Very Good
From $243
Compare at $483
Save 49.6%GIA | 0.3ct | Round | D | VS2 | Excellent
From $266
Compare at $528
Save 23.4%GIA | 0.3ct | Round | D | SI1 | Very Good
From $245
Compare at $320
Save 39.2%IGI | 0.3ct | Round | E | VS1 | Ideal
From $176
Compare at $290
Save 38%IGI | 0.3ct | Round | D | SI1 | Ideal
From $168
Compare at $270
Save 44%IGI | 0.3ct | Round | F | IF | Ideal
From $309
Compare at $551
Save 32.6%IGI | 0.3ct | Round | E | SI1 | Ideal
From $169
Compare at $250
Save 37.5%IGI | 0.3ct | Round | F | IF | Ideal
From $200
Compare at $320
Save 35.6%IGI | 0.3ct | Round | E | VVS1 | Very Good
From $187
Compare at $290
Save 13.3%IGI | 0.3ct | Round | D | VS2 | Ideal
From $137
Compare at $158
Save 13.4%IGI | 0.3ct | Round | E | VS2 | Ideal
From $142
Compare at $164
Save 13.3%IGI | 0.3ct | Round | D | VS2 | Excellent
From $137
Compare at $158
Save 13.5%IGI | 0.3ct | Round | D | VS2 | Very Good
From $129
Compare at $149
Save 15.9%IGI | 0.3ct | Round | H | VVS1 | Ideal
From $244
Compare at $290
Save 19.5%IGI | 0.3ct | Round | D | VS2 | Ideal
From $171
Compare at $213
Save 36.7%IGI | 0.3ct | Round | E | SI1 | Ideal
From $158
Compare at $250
Save 20.6%IGI | 0.3ct | Round | D | VS2 | Ideal
From $150
Compare at $189
Save 22.4%IGI | 0.3ct | Round | F | VVS2 | Excellent
From $178
Compare at $229
Save 42.3%IGI | 0.3ct | Round | E | VS2 | Very Good
From $156
Compare at $270
Save 37.1%IGI | 0.3ct | Round | D | IF | Good
From $264
Compare at $420
Save 42%IGI | 0.3ct | Round | D | VVS2 | Ideal
From $168
Compare at $290
Save 32.9%IGI | 0.3ct | Round | F | VVS2 | Ideal
From $148
Compare at $220
Save 42%IGI | 0.3ct | Round | D | VVS2 | Ideal
From $168
Compare at $290
Save 22.4%IGI | 0.3ct | Round | F | VVS2 | Excellent
From $178
Compare at $229
Save 42.3%IGI | 0.3ct | Round | E | VVS1 | Ideal
From $167
Compare at $290
Save 37.7%IGI | 0.3ct | Round | D | IF | Ideal
From $281
Compare at $450
Save 42.3%IGI | 0.3ct | Round | E | VVS1 | Ideal
From $167
Compare at $290
Save 39.8%IGI | 0.3ct | Round | D | VS2 | Ideal
From $175
Compare at $290
Save 42.8%IGI | 0.3ct | Round | E | VVS2 | Ideal
From $166
Compare at $290
Save 39.4%IGI | 0.3ct | Round | D | IF | Ideal
From $279
Compare at $460
Save 39.4%IGI | 0.3ct | Round | D | IF | Ideal
From $279
Compare at $460
Save 37.7%IGI | 0.3ct | Round | D | IF | Ideal
From $281
Compare at $450
Save 38.6%IGI | 0.3ct | Round | F | VVS2 | Excellent
From $172
Compare at $280
Save 18%IGI | 0.3ct | Round | D | VVS2 | Very Good
From $167
Compare at $203
Save 18%IGI | 0.3ct | Round | E | VS1 | Very Good
From $170
Compare at $207
IGI | 0.3ct | Round | E | IF | Ideal
From $198
Compare at $320
Save 35.1%IGI | 0.3ct | Round | E | VVS1 | Ideal
From $188
Compare at $290
Save 42%IGI | 0.3ct | Round | D | VVS2 | Excellent
From $168
Compare at $290
Save 25.9%IGI | 0.3ct | Round | D | VS1 | Ideal
From $210
Compare at $283
Save 40.7%IGI | 0.3ct | Round | D | IF | Excellent
From $243
Compare at $410
Save 41.1%IGI | 0.3ct | Round | D | VS2 | Very Good
From $159
Compare at $270
Save 27.5%IGI | 0.3ct | Round | F | VVS1 | Excellent
From $166
Compare at $229
Save 39.2%IGI | 0.3ct | Round | F | VVS2 | Ideal
From $164
Compare at $270
Save 35.1%IGI | 0.3ct | Round | D | FL | Ideal
From $318
Compare at $490
Entry pricing in this category starts around $101.
What to Know When Shopping for 0.3 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $414 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 $198 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.
- Round brilliants command a premium due to higher rough waste during cutting. If budget matters, consider oval or cushion shapes for similar visual size.
Frequently Asked Questions
We currently track 2,983 comparable stones in this segment. Prices start around $101 and go up to $515.
Based on the latest market data, the average asking price is about $227 with a median around $198.
The observed spread is roughly $414 across tracked listings, which is about 80.4% 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 $198, 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 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 $414 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 Round Lab Grown Diamond Prices
0.4 Carat Round Lab Grown Diamond Prices
0.5 Carat Round Lab Grown Diamond Prices
0.6 Carat Round Lab Grown Diamond Prices
0.7 Carat Round Lab Grown Diamond Prices
0.8 Carat Round Lab Grown Diamond Prices
0.9 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
Tracking Lab Grown inventory for 0.3 carat Round diamonds.