Round|Natural|GIA

2.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 6521132271

Certificate GIA 6521132271

Diamond specifications and retailer prices

From €20,462 EUR
$22,860 USD
As of November 1, 2026
Save €16,166 EUR (44%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €42,529 EUR 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: €42,529 EUR|Low: €20,413 EUR|High: €48,980 EUR|Avg: €26,971 EUR
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 5€20,413 EUR
Retailer 13€20,462 EUR
Retailer 3€21,565 EUR
Retailer 9€22,059 EUR
Retailer 12€22,476 EUR
Retailer 7€23,900 EUR
Retailer 10€24,010 EUR
Retailer 6€25,868 EUR
Retailer 11€25,913 EUR
Retailer 8€27,844 EUR
Retailer 4€30,285 EUR
Retailer 2€36,628 EUR
Cape Diamonds€42,529 EUR

33 data points across 13 retailers

21 retailers€20,462 EUR to €36,628 EUR

A
Cheapest Retailer
-
€20,462 EUR
$22,860 USD
A
Retailer 2
-
€21,565 EUR
$24,092 USD
View
B+
Retailer 3
-
€21,575 EUR
$24,104 USD
View
A
Retailer 4
-
€22,059 EUR
₹2,347,045 INR
View
B+
Retailer 5
-
€22,476 EUR
$25,110 USD
View
Final sale: no returns
B+
Retailer 6
-
€23,900 EUR
£21,024 GBP
View
B+
Retailer 7
-
€24,010 EUR
$26,824 USD
View
Retailer 8
-
€24,010 EUR
$26,824 USD
View
Price last confirmed 18 days ago
Retailer 9
-
€24,010 EUR
$26,824 USD
View
Price last confirmed 32 days ago
Retailer 10
-
€24,430 EUR
$27,293 USD
View
Price last confirmed 34 days ago
Retailer 11
-
€24,625 EUR
$27,511 USD
View
Price last confirmed 32 days ago
B+
Retailer 12
-
€25,071 EUR
$28,010 USD
View
B+
Retailer 13
-
€25,071 EUR
$28,010 USD
View
Retailer 14
-
€25,407 EUR
$28,385 USD
View
Price last confirmed 33 days ago
B+
Retailer 15
-
€25,868 EUR
£22,756 GBP
View
B+
Retailer 16
-
€25,913 EUR
$28,950 USD
View
Retailer 17
-
€26,384 EUR
$29,476 USD
View
Price last confirmed 32 days ago
B
Retailer 18
-
€27,844 EUR
View
Retailer 19
-
€30,285 EUR
$33,835 USD
View
Price last confirmed 10 days ago
B
Retailer 20
-
€36,628 EUR
£32,221 GBP
View
Most Expensive
Cape Diamonds
cert_6521132271 · Oct 17
€42,529 EUR
ZAR 767,586 ZAR
View
Price last confirmed 14 days ago
20 more retailers have this diamond
Prices start from €20,462 EURSave up to €16,166 EUR

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
€20,462 EUR