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Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2557787831

Certificate GIA 2557787831

Diamond specifications and retailer prices

From HK$83,143 HKD
As of November 5, 2026
Save HK$76,122 HKD (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$159,265 HKD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557787831. Listed at 15 retailers as of November 5, 2026, with prices from HK$83,143 to HK$159,265, a HK$76,122 spread on the same certified stone. NZ Jewellers lists it at HK$159,265. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557787831
Dimensions8.60 × 8.64 × 5.40 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
8.60 mm8.64 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557787831
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°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 5
Current: HK$109,354 HKD|Low: HK$83,143 HKD|High: HK$150,840 HKD|Avg: HK$113,836 HKD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4HK$83,143 HKD
Retailer 5HK$100,277 HKD
Retailer 1HK$109,354 HKD
Retailer 7HK$112,516 HKD
Retailer 8HK$114,273 HKD
Retailer 3HK$114,752 HKD
Retailer 2HK$131,219 HKD
Retailer 6HK$148,839 HKD

29 data points across 8 retailers

15 retailersHK$83,143 HKD to HK$159,265 HKD

A
Cheapest Retailer
-
HK$83,143 HKD
A
Retailer 2
-
HK$96,692 HKD
View
A
Retailer 3
-
HK$97,861 HKD
View
A
Retailer 4
-
HK$100,003 HKD
View
A
Retailer 5
-
HK$100,277 HKD
View
B+
Retailer 6
-
HK$103,635 HKD
View
B+
Retailer 7
-
HK$109,354 HKD
View
B+
Retailer 8
-
HK$112,516 HKD
View
B+
Retailer 9
-
HK$114,273 HKD
View
B+
Retailer 10
-
HK$114,752 HKD
View
B+
Retailer 11
-
HK$117,097 HKD
View
B+
Retailer 12
-
HK$118,666 HKD
View
B+
Retailer 13
-
HK$131,219 HKD
View
B
Retailer 14
-
HK$148,839 HKD
View
Most Expensive
B
NZ Jewellers
4d6658a7-3260-4822-8dd1-ee7eb8b6e0c0 · Nov 5
HK$159,265 HKD
$20,301 USD
View
14 more retailers have this diamond
Prices start from HK$83,143 HKDSave up to HK$76,122 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$83,143 HKD