1.3 Carat Round Natural Diamond Prices Comparison
As of May 2026, 1.3 carat round natural diamonds usually range from $632 to $20,791, with an average price of $6,670.In the last month, prices for these diamonds are up 1.1%.Compare 1,094 verified listings across 9 retailers tracked by CaratRadar.
1.3 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 1,094 verified 1.3-carat round natural diamonds listed across 9 online retailers. Prices in this segment range from $632 to $20,791, with an average asking price of $6,670 and a median of $5,933.
The price spread of $20,160 (97.0% 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.
1,094 diamonds tracked in this segment
Price range: $632 to $20,791
Average price: $6,670
Median price: $5,933
Available across 9 retailers
Savings potential: up to 97.0%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
1,094
$632
$6,670
$5,933
$20,791
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 21%IGI | 1.31ct | Round | K | SI1 | Excellent
From $1,495
Compare at $1,892
Save 20.8%IGI | 1.33ct | Round | K | SI1 | Excellent
From $1,500
Compare at $1,895
Save 27.6%IGI | 1.31ct | Round | K | SI1 | Excellent
From $1,530
Compare at $2,113
Save 21.2%IGI | 1.31ct | Round | K | SI1 | Excellent
From $1,585
Compare at $2,011
Save 27.5%GIA | 1.33ct | Round | L | SI2 | Ideal
From $1,732
Compare at $2,390
GIA | 1.31ct | Round | K | SI2 | Ideal
From $1,751
Compare at $1,764
Save 38.7%GIA | 1.35ct | Round | K | SI2 | Excellent
From $1,822
Compare at $2,970
Save 41.5%GIA | 1.32ct | Round | L | SI1 | Excellent
From $1,824
Compare at $3,116
Save 13.1%GIA | 1.39ct | Round | L | SI2 | Ideal
From $1,853
Compare at $2,133
Save 21.8%IGI | 1.31ct | Round | J | SI1 | Excellent
From $1,865
Compare at $2,384
Save 26.5%GIA | 1.35ct | Round | L | SI1 | Ideal
From $1,866
Compare at $2,539
Save 21.6%IGI | 1.31ct | Round | K | VS2 | Excellent
From $1,885
Compare at $2,404
Save 33.2%GIA | 1.31ct | Round | L | SI1 | Ideal
From $1,980
Compare at $2,964
IGI | 1.33ct | Round | J | SI1 | Excellent
From $1,988
Compare at $1,990
Save 24.7%GIA | 1.32ct | Round | K | SI2 | Excellent
From $2,022
Compare at $2,684
Save 21.6%IGI | 1.34ct | Round | K | VS1 | Excellent
From $2,030
Compare at $2,590
Save 28.1%GIA | 1.31ct | Round | J | SI2 | Ideal
From $2,031
Compare at $2,825
Save 36.4%GIA | 1.32ct | Round | K | SI1 | Excellent
From $2,035
Compare at $3,199
Save 32.2%GIA | 1.32ct | Round | L | SI2 | Ideal
From $2,065
Compare at $3,047
GIA | 1.35ct | Round | L | SI1 | Excellent
From $2,069
Compare at $2,253
Save 21.8%IGI | 1.31ct | Round | J | VS1 | Excellent
From $2,105
Compare at $2,691
Save 14.2%IGI | 1.31ct | Round | K | VS1 | Excellent
From $2,120
Compare at $2,471
Save 17.3%IGI | 1.35ct | Round | K | VVS1 | Excellent
From $2,140
Compare at $2,589
Save 12.7%IGI | 1.35ct | Round | K | VVS2 | Excellent
From $2,205
Compare at $2,525
Save 20.1%GIA | 1.31ct | Round | K | SI1 | Excellent
From $2,209
Compare at $2,764
Save 38.4%GIA | 1.31ct | Round | J | SI2 | Excellent
From $2,213
Compare at $3,590
Save 32.2%GIA | 1.32ct | Round | K | SI1 | Ideal
From $2,226
Compare at $3,284
Save 32.5%GIA | 1.37ct | Round | L | SI1 | Excellent
From $2,229
Compare at $3,303
Save 22.3%GIA | 1.38ct | Round | L | VS2 | Excellent
From $2,231
Compare at $2,871
Save 14.2%IGI | 1.32ct | Round | J | VS2 | Excellent
From $2,235
Compare at $2,605
IGI | 1.31ct | Round | J | SI1 | Ideal
From $2,240
Compare at $2,432
Save 29.7%GIA | 1.32ct | Round | K | SI2 | Excellent
From $2,251
Compare at $3,201
Save 36.7%GIA | 1.35ct | Round | J | SI2 | Excellent
From $2,265
Compare at $3,577
Save 11.5%GIA | 1.31ct | Round | K | SI1 | Excellent
From $2,270
Compare at $2,564
Save 20%IGI | 1.37ct | Round | I | SI1 | Excellent
From $2,285
Compare at $2,858
Save 20.3%GIA | 1.31ct | Round | L | SI2 | Very Good
From $2,293
Compare at $2,878
Save 20.1%IGI | 1.33ct | Round | J | SI1 | Excellent
From $2,295
Compare at $2,871
IGI | 1.31ct | Round | J | SI1 | Excellent
From $2,298
Compare at $2,380
Save 35.7%GIA | 1.35ct | Round | K | SI2 | Excellent
From $2,302
Compare at $3,578
Save 14.9%GIA | 1.37ct | Round | K | SI1 | Ideal
From $2,302
Compare at $2,704
Save 27.3%GIA | 1.31ct | Round | L | VS2 | Excellent
From $2,318
Compare at $3,188
Save 38.3%GIA | 1.34ct | Round | J | SI2 | Excellent
From $2,344
Compare at $3,800
Save 13.1%IGI | 1.33ct | Round | J | VS2 | Excellent
From $2,350
Compare at $2,703
Save 17%GIA | 1.34ct | Round | K | SI1 | Excellent
From $2,352
Compare at $2,833
Save 14%GIA | 1.39ct | Round | K | SI2 | Excellent
From $2,362
Compare at $2,746
Save 20.8%IGI | 1.31ct | Round | J | VS2 | Excellent
From $2,365
Compare at $2,984
Save 20.7%IGI | 1.31ct | Round | J | VS2 | Excellent
From $2,385
Compare at $3,008
Save 33.8%GIA | 1.32ct | Round | J | SI2 | Excellent
From $2,390
Compare at $3,613
Save 13%IGI | 1.32ct | Round | K | VVS2 | Excellent
From $2,390
Compare at $2,749
Save 18.9%GIA | 1.32ct | Round | J | SI1 | Excellent
From $2,409
Compare at $2,970
Entry pricing in this category starts around $632.
What to Know When Shopping for 1.3 Carat Round Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $20,160 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 $5,933 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.
- 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 1,094 comparable stones in this segment. Prices start around $632 and go up to $20,791.
Based on the latest market data, the average asking price is about $6,670 with a median around $5,933.
The observed spread is roughly $20,160 across tracked listings, which is about 97.0% 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 $6,670. The median price is $5,933, 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 9 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 $20,160 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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Tracking Natural inventory for 1.3 carat Round diamonds.