Round|Natural|GIA

2.51ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 6521132271

Certificate GIA 6521132271

Diamond specifications and retailer prices

From HK$179,353 HKD
$22,860 USD
As of November 1, 2026
Save HK$141,699 HKD (44%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: HK$372,777 HKD 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
Colour
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: HK$372,777 HKD|Low: HK$178,929 HKD|High: HK$429,321 HKD|Avg: HK$236,304 HKD
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 2, 2026
Retailer 5HK$178,929 HKD
Retailer 13HK$179,353 HKD
Retailer 3HK$189,019 HKD
Retailer 9HK$193,349 HKD
Retailer 12HK$197,006 HKD
Retailer 2HK$209,488 HKD
Retailer 10HK$210,453 HKD
Retailer 7HK$226,738 HKD
Retailer 11HK$227,133 HKD
Retailer 8HK$244,059 HKD
Retailer 4HK$265,459 HKD
Retailer 6HK$321,051 HKD
Cape DiamondsHK$372,777 HKD

34 data points across 13 retailers

21 retailersHK$179,353 HKD to HK$321,051 HKD

A
Cheapest Retailer
-
HK$179,353 HKD
$22,860 USD
A
Retailer 2
-
HK$189,019 HKD
$24,092 USD
View
B+
Retailer 3
-
HK$189,113 HKD
$24,104 USD
View
A
Retailer 4
-
HK$193,349 HKD
₹2,347,045 INR
View
B+
Retailer 5
-
HK$197,006 HKD
$25,110 USD
View
Final sale: no returns
B+
Retailer 6
-
HK$209,488 HKD
£21,024 GBP
View
B+
Retailer 7
-
HK$210,453 HKD
$26,824 USD
View
Retailer 8
-
HK$210,453 HKD
$26,824 USD
View
Price last confirmed 18 days ago
Retailer 9
-
HK$210,453 HKD
$26,824 USD
View
Price last confirmed 32 days ago
Retailer 10
-
HK$214,133 HKD
$27,293 USD
View
Price last confirmed 35 days ago
Retailer 11
-
HK$215,843 HKD
$27,511 USD
View
Price last confirmed 33 days ago
B+
Retailer 12
-
HK$219,758 HKD
$28,010 USD
View
B+
Retailer 13
-
HK$219,758 HKD
$28,010 USD
View
Retailer 14
-
HK$222,700 HKD
$28,385 USD
View
Price last confirmed 34 days ago
B+
Retailer 15
-
HK$226,738 HKD
£22,756 GBP
View
B+
Retailer 16
-
HK$227,133 HKD
$28,950 USD
View
Retailer 17
-
HK$231,260 HKD
$29,476 USD
View
Price last confirmed 33 days ago
B
Retailer 18
-
HK$244,059 HKD
€29,626 EUR
View
Retailer 19
-
HK$265,459 HKD
$33,835 USD
View
Price last confirmed 11 days ago
B
Retailer 20
-
HK$321,051 HKD
£32,221 GBP
View
Most Expensive
Cape Diamonds
cert_6521132271 · Oct 17
HK$372,777 HKD
ZAR 767,586 ZAR
View
Price last confirmed 15 days ago
20 more retailers have this diamond
Prices start from HK$179,353 HKDSave up to HK$141,699 HKD

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
HK$179,353 HKD