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1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 754512199

Shape and cutting style on the report: Round brilliant

Certificate IGI 754512199

Diamond specifications and retailer prices

From $2,744 SGD
As of November 6, 2026
Save $4,396 SGD (62%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $7,140 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 754512199. Listed at 19 retailers as of November 5, 2026, with prices from $2,744 to $7,140, a $4,396 spread on the same certified stone. NZ Jewellers lists it at $7,140. 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

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 754512199
Dimensions7.17 × 7.23 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.17 mm7.23 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 754512199
Side View
Table 56.0%Crown 36.7°Girdle: Slightly ThickPavilion 40.5°Culet: NoneDepth 63.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $2,744 SGD|Low: $2,744 SGD|High: $6,054 SGD|Avg: $3,752 SGD|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 1$2,744 SGD
Retailer 9$2,938 SGD
Retailer 6$3,096 SGD
Retailer 2$3,366 SGD
Retailer 10$3,469 SGD
Retailer 3$3,657 SGD
Retailer 4$3,998 SGD
Retailer 5$4,168 SGD
Retailer 7$4,218 SGD
Retailer 8$5,968 SGD

33 data points across 10 retailers

19 retailers$2,744 SGD to $7,140 SGD

A
Cheapest Retailer
-
$2,744 SGD
A
Retailer 2
-
$2,938 SGD
View
A
Retailer 3
-
$3,058 SGD
View
A
Retailer 4
-
$3,096 SGD
View
B+
Retailer 5
-
$3,366 SGD
View
Retailer 6
-
$3,416 SGD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$3,416 SGD
View
A
Retailer 8
-
$3,469 SGD
View
B+
Retailer 9
-
$3,476 SGD
View
B+
Retailer 10
-
$3,547 SGD
View
B+
Retailer 11
-
$3,596 SGD
View
A
Retailer 12
-
$3,657 SGD
View
B+
Retailer 13
-
$3,940 SGD
View
A
Retailer 14
-
$3,998 SGD
View
A
Retailer 15
-
$4,168 SGD
View
A
Retailer 16
-
$4,218 SGD
View
B+
Retailer 17
-
$5,239 SGD
View
B+
Retailer 18
-
$5,968 SGD
View
Most Expensive
B
NZ Jewellers
506969c5-90e3-475c-97b0-c094ff3fa585 · Nov 5
$7,140 SGD
$5,590 USD
View
18 more retailers have this diamond
Prices start from $2,744 SGDSave up to $4,396 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
1.51ct Round
$2,744 SGD