0.3 Carat Radiant Natural Diamond Prices Comparison
As of October 2026, 0.3 carat radiant natural diamonds in the 0.30–0.39 carat benchmark range usually range from $194 to $7,601, with an average price of $668.In the last month, prices for these diamonds are down 1.1%.Compare 495 verified listings across 11 retailers tracked by CaratRadar.
0.3 Carat Radiant Natural Diamond Market Overview
CaratRadar currently tracks 495 verified 0.3-carat radiant natural diamonds in the 0.30–0.39 carat benchmark range, listed across 11 online retailers. Prices in this segment range from $194 to $7,601, with an average asking price of $668 and a median of $637.
The price spread of $7,407 (97.4% 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.
495 diamonds tracked in the 0.30–0.39 carat benchmark
Price range: $194 to $7,601
Average price: $668
Median price: $637
Available across 11 retailers
Savings potential: up to 97.4%
Price Range Overview
As of Oct 14, 2026Real market range for this carat, shape, and diamond type.
495
$194
$668
$637
$7,601
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 42%GIA | 0.3ct | Radiant | H | SI2 | Excellent
From $211
Compare at $363
Save 40.1%GIA | 0.3ct | Radiant | E | SI1 | Ideal
From $240
Compare at $401
Save 31.9%GIA | 0.3ct | Radiant | H | SI1 | Excellent
From $256
Compare at $376
Save 31.9%GIA | 0.3ct | Radiant | H | SI1 | Ideal
From $259
Compare at $380
Save 31.6%GIA | 0.33ct | Radiant | J | VS2 | Excellent
From $260
Compare at $380
Save 32.8%GIA | 0.35ct | Radiant | J | VS1 | Excellent
From $260
Compare at $387
Save 50.8%GIA | 0.33ct | Radiant | H | VS1 | Ideal
From $270
Compare at $549
Save 14.3%GIA | 0.31ct | Radiant | J | VVS2 | Excellent
From $270
Compare at $315
Save 31.5%GIA | 0.3ct | Radiant | F | SI1 | Excellent
From $272
Compare at $397
Save 31.4%GIA | 0.3ct | Radiant | F | SI1 | Ideal
From $275
Compare at $401
Save 50.4%GIA | 0.31ct | Radiant | H | VS2 | Ideal
From $276
Compare at $556
Save 31.4%GIA | 0.3ct | Radiant | I | VVS2 | Excellent
From $277
Compare at $403
Save 31.4%GIA | 0.3ct | Radiant | I | VVS2 | Excellent
From $278
Compare at $405
Save 34.7%GIA | 0.33ct | Radiant | J | VS1 | Excellent
From $280
Compare at $429
Save 31.3%GIA | 0.3ct | Radiant | I | VVS1 | Excellent
From $280
Compare at $408
Save 31.3%GIA | 0.3ct | Radiant | D | SI2 | Excellent
From $281
Compare at $409
Save 28.4%GIA | 0.3ct | Radiant | G | SI1 | Excellent
From $281
Compare at $392
Save 28.4%GIA | 0.3ct | Radiant | F | SI1 | Excellent
From $281
Compare at $392
Save 31.3%GIA | 0.3ct | Radiant | H | VS2 | Excellent
From $282
Compare at $410
Save 14.1%IGI | 0.32ct | Radiant | E | SI1 | Very Good
From $285
Compare at $332
Save 28.3%GIA | 0.3ct | Radiant | G | VS1 | Very Good
From $290
Compare at $404
Save 35.3%GIA | 0.31ct | Radiant | G | VS1 | Ideal
From $290
Compare at $448
Save 35.1%GIA | 0.3ct | Radiant | F | SI1 | Ideal
From $290
Compare at $447
Save 28.3%GIA | 0.3ct | Radiant | G | VS1 | Excellent
From $296
Compare at $413
Save 31%GIA | 0.3ct | Radiant | H | VVS2 | Excellent
From $296
Compare at $429
Save 33.8%GIA | 0.31ct | Radiant | G | VS2 | Ideal
From $300
Compare at $453
Save 51.9%GIA | 0.3ct | Radiant | H | SI1 | Ideal
From $300
Compare at $624
Save 28.3%GIA | 0.3ct | Radiant | G | VVS2 | Excellent
From $304
Compare at $424
Save 12.6%GIA | 0.32ct | Radiant | J | SI2 | Excellent
From $304
Compare at $348
Save 28.3%GIA | 0.3ct | Radiant | H | VS1 | Excellent
From $304
Compare at $424
Save 31.5%GIA | 0.3ct | Radiant | H | SI1 | Ideal
From $310
Compare at $452
Save 31.9%GIA | 0.32ct | Radiant | H | VVS2 | Ideal
From $310
Compare at $455
Save 31.5%GIA | 0.3ct | Radiant | H | SI1 | Ideal
From $310
Compare at $452
Save 29.7%GIA | 0.3ct | Radiant | D | VS1 | Ideal
From $310
Compare at $441
Save 31.5%GIA | 0.32ct | Radiant | H | SI1 | Ideal
From $310
Compare at $452
Save 33.3%GIA | 0.37ct | Radiant | F | SI2 | Ideal
From $310
Compare at $465
Save 32.8%GIA | 0.34ct | Radiant | G | VS1 | Ideal
From $310
Compare at $461
Save 30.7%GIA | 0.3ct | Radiant | H | VVS1 | Ideal
From $312
Compare at $450
Save 30.7%GIA | 0.3ct | Radiant | H | VVS1 | Ideal
From $312
Compare at $450
Save 30.6%GIA | 0.3ct | Radiant | H | VVS1 | Excellent
From $312
Compare at $450
Save 30.5%GIA | 0.3ct | Radiant | G | VVS2 | Ideal
From $315
Compare at $454
GIA | 0.35ct | Radiant | E | SI1 | Excellent
From $319
Compare at $344
Save 51.7%GIA | 0.32ct | Radiant | I | VS1 | Ideal
From $320
Compare at $663
Save 32.8%GIA | 0.34ct | Radiant | I | VVS2 | Ideal
From $320
Compare at $476
Save 31.5%GIA | 0.31ct | Radiant | H | SI1 | Ideal
From $320
Compare at $467
Save 34.4%GIA | 0.3ct | Radiant | I | VVS2 | Ideal
From $320
Compare at $488
Save 33.2%GIA | 0.31ct | Radiant | G | VVS1 | Ideal
From $320
Compare at $479
Save 30.5%GIA | 0.3ct | Radiant | G | VVS1 | Excellent
From $321
Compare at $461
Save 30.4%GIA | 0.3ct | Radiant | I | IF | Excellent
From $322
Compare at $463
Save 28.2%GIA | 0.3ct | Radiant | G | VVS1 | Excellent
From $324
Compare at $451
Entry pricing in this benchmark range starts around $194.
What to Know When Shopping for 0.3 Carat Radiant Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $7,407 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 $637 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.
- Compare natural vs. lab-grown options for the same carat and shape. Lab-grown diamonds are chemically identical but often 30-50% less expensive.
- 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 495 comparable stones in the 0.30–0.39 carat benchmark range. Prices start around $194 and go up to $7,601.
Based on the latest market data, the average asking price is about $668 with a median around $637.
The observed spread is roughly $7,407 across tracked listings, which is about 97.4% 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 $668. The median price is $637, 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 11 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 $7,407 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
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Tracking Natural inventory for the 0.30–0.39 carat Radiant diamond benchmark.