1.3 Carat Round Natural Diamond Prices Comparison
As of July 2026, 1.3 carat round natural diamonds usually range from $632 to $20,506, with an average price of $6,610.In the last month, prices for these diamonds are down 0.3%.Compare 877 verified listings across 10 retailers tracked by CaratRadar.
1.3 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 877 verified 1.3-carat round natural diamonds listed across 10 online retailers. Prices in this segment range from $632 to $20,506, with an average asking price of $6,610 and a median of $5,880.
The price spread of $19,875 (96.9% 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.
877 diamonds tracked in this segment
Price range: $632 to $20,506
Average price: $6,610
Median price: $5,880
Available across 10 retailers
Savings potential: up to 96.9%
Price Range Overview
As of Jul 14, 2026Real market range for this carat, shape, and diamond type.
877
$632
$6,610
$5,880
$20,506
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGI | 1.33ct | Round | K | SI1 | Excellent
From $1,355
Save 17.9%IGI | 1.31ct | Round | L | VS2 | Ideal
From $1,542
Compare at $1,879
IGI | 1.31ct | Round | K | SI1 | Excellent
From $1,546
Compare at $1,550
Save 34.4%GIA | 1.31ct | Round | J | SI2 | Ideal
From $1,547
Compare at $2,358
IGI | 1.31ct | Round | G | SI2 | Ideal
From $1,711
Save 24.9%GIA | 1.35ct | Round | L | SI1 | Excellent
From $1,742
Compare at $2,321
Save 36.5%GIA | 1.31ct | Round | L | SI2 | Very Good
From $1,795
Compare at $2,828
GIA | 1.35ct | Round | L | SI2 | Excellent
From $1,804
Compare at $2,004
Save 33.1%GIA | 1.31ct | Round | L | SI1 | Ideal
From $1,811
Compare at $2,706
Save 35%GIA | 1.31ct | Round | H | SI2 | Ideal
From $1,818
Compare at $2,796
IGI | 1.31ct | Round | F | SI2 | Excellent
From $1,836
Compare at $1,852
IGI | 1.36ct | Round | J | SI1 | Ideal
From $1,840
Compare at $1,971
IGI | 1.31ct | Round | K | VS2 | Excellent
From $1,855
Save 38.6%GIA | 1.32ct | Round | L | SI1 | Excellent
From $1,862
Compare at $3,035
IGI | 1.31ct | Round | K | VS1 | Excellent
From $1,885
Save 22.8%GIA | 1.31ct | Round | K | SI1 | Excellent
From $1,898
Compare at $2,460
IGI | 1.33ct | Round | K | SI1 | Excellent
From $1,906
Compare at $1,910
Save 15.6%GIA | 1.31ct | Round | K | SI2 | Excellent
From $1,932
Compare at $2,289
Save 21.6%GIA | 1.31ct | Round | J | SI2 | Ideal
From $1,963
Compare at $2,503
IGI | 1.34ct | Round | K | VS1 | Excellent
From $1,980
Compare at $2,124
Save 34.9%GIA | 1.37ct | Round | L | SI1 | Excellent
From $2,007
Compare at $3,084
IGI | 1.33ct | Round | I | SI2 | Ideal
From $2,015
Compare at $2,032
Save 14.9%IGI | 1.35ct | Round | K | VVS1 | Excellent
From $2,025
Compare at $2,379
Save 36.5%GIA | 1.32ct | Round | K | SI1 | Excellent
From $2,031
Compare at $3,199
Save 36.5%GIA | 1.32ct | Round | K | SI2 | Excellent
From $2,032
Compare at $3,201
IGI | 1.38ct | Round | K | VS1 | Ideal
From $2,069
Compare at $2,070
GIA | 1.31ct | Round | K | SI2 | Ideal
From $2,113
Compare at $2,324
Save 19.2%GIA | 1.34ct | Round | K | SI1 | Excellent
From $2,124
Compare at $2,628
IGI | 1.32ct | Round | K | VVS2 | Excellent
From $2,143
Compare at $2,305
Save 35%GIA | 1.32ct | Round | K | SI1 | Ideal
From $2,155
Compare at $3,313
Save 38.4%GIA | 1.31ct | Round | J | SI2 | Excellent
From $2,177
Compare at $3,532
Save 36.5%GIA | 1.37ct | Round | L | VS2 | Good
From $2,187
Compare at $3,444
Save 37.3%GIA | 1.32ct | Round | K | SI1 | Excellent
From $2,196
Compare at $3,505
Save 36.5%GIA | 1.35ct | Round | L | SI1 | Ideal
From $2,201
Compare at $3,467
Save 36.5%GIA | 1.37ct | Round | K | SI2 | Excellent
From $2,265
Compare at $3,569
Save 35%GIA | 1.32ct | Round | J | SI2 | Excellent
From $2,275
Compare at $3,498
IGI | 1.37ct | Round | I | SI1 | Excellent
From $2,282
Compare at $2,285
IGI | 1.33ct | Round | J | SI1 | Excellent
From $2,292
Compare at $2,295
Save 35%GIA | 1.36ct | Round | L | VVS2 | Ideal
From $2,296
Compare at $3,530
IGI | 1.31ct | Round | J | VVS2 | Excellent
From $2,300
Compare at $2,453
Save 37.1%GIA | 1.38ct | Round | L | VS2 | Ideal
From $2,301
Compare at $3,656
Save 37.8%GIA | 1.31ct | Round | K | SI1 | Excellent
From $2,308
Compare at $3,710
IGI | 1.32ct | Round | J | VS1 | Excellent
From $2,322
Compare at $2,325
Save 36.4%GIA | 1.35ct | Round | J | SI2 | Ideal
From $2,331
Compare at $3,667
GIA | 1.34ct | Round | J | SI2 | Excellent
From $2,344
Compare at $2,409
IGI | 1.34ct | Round | J | VS1 | Excellent
From $2,360
Compare at $2,540
IGI | 1.31ct | Round | J | VS2 | Excellent
From $2,362
Compare at $2,605
IGI | 1.31ct | Round | J | VS2 | Excellent
From $2,381
Compare at $2,620
Save 36.9%GIA | 1.33ct | Round | L | VS2 | Excellent
From $2,387
Compare at $3,781
IGI | 1.31ct | Round | I | SI1 | Excellent
From $2,390
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 $19,875 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 $5,880 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 877 comparable stones in this segment. Prices start around $632 and go up to $20,506.
Based on the latest market data, the average asking price is about $6,610 with a median around $5,880.
The observed spread is roughly $19,875 across tracked listings, which is about 96.9% 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 $6,610. The median price is $5,880, 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 10 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 $19,875 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.