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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 $13,537 SGD
As of November 5, 2026
Save $12,394 SGD (48%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $25,930 SGD 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 $13,537 to $25,930, a $12,394 spread on the same certified stone. NZ Jewellers lists it at $25,930. 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: $17,804 SGD|Low: $13,537 SGD|High: $24,559 SGD|Avg: $18,534 SGD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4$13,537 SGD
Retailer 5$16,326 SGD
Retailer 1$17,804 SGD
Retailer 7$18,319 SGD
Retailer 8$18,605 SGD
Retailer 3$18,683 SGD
Retailer 2$21,364 SGD
Retailer 6$24,233 SGD

29 data points across 8 retailers

15 retailers$13,537 SGD to $25,930 SGD

A
Cheapest Retailer
-
$13,537 SGD
A
Retailer 2
-
$15,743 SGD
View
A
Retailer 3
-
$15,933 SGD
View
A
Retailer 4
-
$16,282 SGD
View
A
Retailer 5
-
$16,326 SGD
View
B+
Retailer 6
-
$16,873 SGD
View
B+
Retailer 7
-
$17,804 SGD
View
B+
Retailer 8
-
$18,319 SGD
View
B+
Retailer 9
-
$18,605 SGD
View
B+
Retailer 10
-
$18,683 SGD
View
B+
Retailer 11
-
$19,065 SGD
View
B+
Retailer 12
-
$19,320 SGD
View
B+
Retailer 13
-
$21,364 SGD
View
B
Retailer 14
-
$24,233 SGD
View
Most Expensive
B
NZ Jewellers
4d6658a7-3260-4822-8dd1-ee7eb8b6e0c0 · Nov 5
$25,930 SGD
$20,301 USD
View
14 more retailers have this diamond
Prices start from $13,537 SGDSave up to $12,394 SGD

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
$13,537 SGD