Round|Natural|GIA

2.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 6521132271

Certificate GIA 6521132271

Diamond specifications and retailer prices

From $22,860 USD
As of November 1, 2026
Save $18,061 USD (44%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $47,514 USD at Cape Diamonds · As of October 17, 2026
View at Cape Diamonds

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6521132271. Listed at 21 retailers as of November 1, 2026, with a 79% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.51
Carat
G
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6521132271
Dimensions8.65 × 8.58 × 5.40 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
8.65 mm8.58 mm2.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6521132271
Side View
Table 56.0%Crown 36.5°Girdle: ThickPavilion 40.6°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $47,514 USD|Low: $22,860 USD|High: $54,720 USD|Avg: $30,927 USD
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 3, 2026
Retailer 12$22,860 USD
Retailer 3$24,092 USD
Retailer 8$24,644 USD
Retailer 11$25,110 USD
Retailer 2$26,479 USD
Retailer 9$26,824 USD
Retailer 5$28,897 USD
Retailer 10$28,950 USD
Retailer 7$31,107 USD
Retailer 4$33,835 USD
Retailer 6$40,921 USD
Cape Diamonds$47,514 USD

34 data points across 12 retailers

21 retailers$22,860 USD to $40,921 USD

A
Cheapest Retailer
-
$22,860 USD
A
Retailer 2
-
$24,092 USD
View
B+
Retailer 3
-
$24,104 USD
View
A
Retailer 4
-
$24,644 USD
₹2,347,045 INR
View
B+
Retailer 5
-
$25,110 USD
View
Final sale: no returns
B+
Retailer 6
-
$26,479 USD
£20,850 GBP
View
B+
Retailer 7
-
$26,824 USD
View
Retailer 8
-
$26,824 USD
View
Price last confirmed 19 days ago
Retailer 9
-
$26,824 USD
View
Price last confirmed 33 days ago
Retailer 10
-
$27,293 USD
View
Price last confirmed 35 days ago
Retailer 11
-
$27,511 USD
View
Price last confirmed 34 days ago
B+
Retailer 12
-
$28,010 USD
View
B+
Retailer 13
-
$28,010 USD
View
Retailer 14
-
$28,385 USD
View
Price last confirmed 35 days ago
B+
Retailer 15
-
$28,897 USD
£22,754 GBP
View
B+
Retailer 16
-
$28,950 USD
View
Retailer 17
-
$29,476 USD
View
Price last confirmed 34 days ago
B
Retailer 18
-
$31,107 USD
€29,626 EUR
View
Retailer 19
-
$33,835 USD
View
Price last confirmed 12 days ago
B
Retailer 20
-
$40,921 USD
£32,221 GBP
View
Most Expensive
Cape Diamonds
cert_6521132271 · Oct 17
$47,514 USD
ZAR 767,586 ZAR
View
Price last confirmed 16 days ago
20 more retailers have this diamond
Prices start from $22,860 USDSave up to $18,061 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
2.51ct Round
$22,860 USD