5.1 Carat Round Natural Diamond Prices Comparison
As of April 2026, 5.1 carat round natural diamonds usually range from $3,736 to $337,742, with an average price of $103,934.In the last month, prices for these diamonds are down 0.2%.Compare 54 verified listings across 7 retailers tracked by CaratRadar.
5.1 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 54 verified 5.1-carat round natural diamonds listed across 7 online retailers. Prices in this segment range from $3,736 to $337,742, with an average asking price of $103,934 and a median of $93,420.
The price spread of $334,006 (98.9% 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.
54 diamonds tracked in this segment
Price range: $3,736 to $337,742
Average price: $103,934
Median price: $93,420
Available across 7 retailers
Savings potential: up to 98.9%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
54
$3,736
$103,934
$93,420
$337,742
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIA | 5.1ct | Round | J | SI2 | Very Good
From $77,513
Compare at $79,070
Save 16.1%GIA | 5.1ct | Round | J | VS2 | Excellent
From $69,752
Compare at $83,123
Save 14.1%GIA | 5.1ct | Round | J | VVS1 | Excellent
From $90,148
Compare at $104,898
GIA | 5.1ct | Round | J | SI2 | Excellent
From $83,180
Compare at $100,390
GIA | 5.1ct | Round | G | SI1 | Excellent
From $124,114
Compare at $134,462
GIA | 5.1ct | Round | F | SI1 | Ideal
From $125,457
Compare at $130,868
Save 14.5%GIA | 5.1ct | Round | H | VVS2 | Ideal
From $120,439
Compare at $140,944
Save 24.2%IGI | 5.1ct | Round | H | VS1 | Excellent
From $81,719
Compare at $107,842
Save 14.6%GIA | 5.11ct | Round | D | VS2 | Excellent
From $168,310
Compare at $197,015
GIA | 5.11ct | Round | K | SI2 | Excellent
From $40,211
Compare at $44,372
Save 16.1%GIA | 5.11ct | Round | J | SI1 | Excellent
From $64,644
Compare at $77,025
GIA | 5.12ct | Round | J | SI2 | Excellent
From $74,039
Compare at $79,142
GIA | 5.12ct | Round | G | VS1 | Excellent
From $332,035
Compare at $358,748
Save 16.1%GIA | 5.12ct | Round | J | SI2 | Excellent
From $60,476
Compare at $72,050
Save 15.3%GIA | 5.12ct | Round | D | VVS2 | Ideal
From $273,429
Compare at $322,776
GIA | 5.12ct | Round | D | SI1 | Excellent
From $142,664
Compare at $157,318
Save 16.1%GIA | 5.12ct | Round | G | SI2 | Excellent
From $73,064
Compare at $87,075
GIA | 5.12ct | Round | F | VVS2 | Excellent
From $226,561
Compare at $250,136
Save 14.5%GIA | 5.12ct | Round | G | VS2 | Excellent
From $149,180
Compare at $174,392
GIA | 5.13ct | Round | K | VS2 | Excellent
From $74,517
Compare at $75,349
Save 16.7%GIA | 5.13ct | Round | L | SI1 | Excellent
From $54,267
Compare at $65,139
GIA | 5.13ct | Round | K | VVS1 | Excellent
From $113,440
Compare at $136,885
Save 10.2%GIA | 5.13ct | Round | D | VS2 | Excellent
From $167,099
Compare at $186,156
Save 16.5%GIA | 5.13ct | Round | H | SI2 | Excellent
From $102,885
Compare at $123,237
Save 15.3%GIA | 5.13ct | Round | D | VVS1 | Excellent
From $261,518
Compare at $308,715
Save 26.2%GIA | 5.13ct | Round | J | SI2 | Excellent
From $56,146
Compare at $76,130
Save 16.8%GIA | 5.13ct | Round | D | SI2 | Excellent
From $96,860
Compare at $116,463
Save 11.8%GIA | 5.14ct | Round | H | VS2 | Excellent
From $117,186
Compare at $132,841
GIA | 5.14ct | Round | I | VVS1 | Excellent
From $127,728
Compare at $140,710
Save 11.8%GIA | 5.14ct | Round | E | SI1 | Excellent
From $133,087
Compare at $150,856
Save 29.3%GIA | 5.14ct | Round | I | SI1 | Ideal
From $64,383
Compare at $91,114
Save 25.3%GIA | 5.14ct | Round | J | SI2 | Excellent
From $63,641
Compare at $85,196
Save 12.6%IGI | 5.14ct | Round | I | VS2 | Excellent
From $43,839
Compare at $50,155
Save 11.3%IGI | 5.14ct | Round | J | VVS1 | Excellent
From $45,020
Compare at $50,727
Save 21.6%GIA | 5.15ct | Round | F | VS2 | Excellent
From $203,336
Compare at $259,512
GIA | 5.15ct | Round | J | VS2 | Excellent
From $74,115
Compare at $89,455
Save 14.5%GIA | 5.15ct | Round | G | VVS2 | Excellent
From $231,612
Compare at $270,759
Save 14.1%GIA | 5.15ct | Round | J | SI2 | Excellent
From $49,864
Compare at $58,022
Save 23.9%GIA | 5.15ct | Round | K | SI1 | Excellent
From $59,337
Compare at $78,010
Save 14.1%GIA | 5.15ct | Round | K | SI1 | Ideal
From $59,933
Compare at $69,739
IGI | 5.15ct | Round | I | IF | Excellent
From $88,299
Compare at $96,817
Save 20.2%GIA | 5.16ct | Round | F | VVS1 | Excellent
From $167,676
Compare at $210,025
GIA | 5.16ct | Round | D | VVS2 | Excellent
From $269,621
Compare at $287,274
Save 24.2%GIA | 5.16ct | Round | F | SI2 | Ideal
From $100,470
Compare at $132,588
Save 14.5%GIA | 5.17ct | Round | D | VS2 | Excellent
From $195,326
Compare at $228,340
Save 14.6%GIA | 5.17ct | Round | D | VS2 | Excellent
From $183,293
Compare at $214,565
Save 14.5%GIA | 5.17ct | Round | H | VVS2 | Excellent
From $152,539
Compare at $178,320
Save 25.2%GIA | 5.18ct | Round | I | SI2 | Very Good
From $50,966
Compare at $68,182
GIA | 5.18ct | Round | K | VVS2 | Excellent
From $86,307
Compare at $92,495
Save 29.3%GIA | 5.18ct | Round | K | VVS2 | Excellent
From $52,358
Compare at $74,095
Entry pricing in this category starts around $3,736.
What to Know When Shopping for 5.1 Carat Round Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $334,006 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 $93,420 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 54 comparable stones in this segment. Prices start around $3,736 and go up to $337,742.
Based on the latest market data, the average asking price is about $103,934 with a median around $93,420.
The observed spread is roughly $334,006 across tracked listings, which is about 98.9% 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 $93,420, 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 7 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 $334,006 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 5.1 carat Round diamonds.