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1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 713545321

Shape and cutting style on the report: Round brilliant

Certificate IGI 713545321

Diamond specifications and retailer prices

From $3,280 SGD
$2,565 USD
As of November 1, 2026
Save $4,375 SGD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,655 SGD at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 713545321. Listed at 20 retailers as of October 30, 2026, with prices from $3,280 to $7,655, a $4,375 spread on the same certified stone. NZ Jewellers lists it at $7,655. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.6°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 713545321
Dimensions7.30 × 7.18 × 4.59 mm
L/W Ratio1.02
Girdle conditionPARTLY FACETED
Culet sizePointed
Top View
7.30 mm7.18 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 713545321
Side View
Table 57.0%Crown 36.6°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.2%

Caratlytics Score

How it works →
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 1
Current: $7,655 SGD|Low: $3,097 SGD|High: $7,655 SGD|Avg: $4,372 SGD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 15$3,280 SGD
Retailer 14$3,379 SGD
Retailer 5$3,398 SGD
Retailer 3$3,587 SGD
Retailer 7$3,661 SGD
Retailer 4$3,802 SGD
Retailer 8$3,961 SGD
Retailer 13$4,017 SGD
Retailer 6$4,225 SGD
Retailer 9$4,268 SGD
Retailer 12$4,280 SGD
Retailer 2$4,374 SGD
Retailer 11$4,501 SGD
Retailer 10$6,123 SGD
NZ Jewellers$7,655 SGD

39 data points across 15 retailers

20 retailers$3,280 SGD to $7,655 SGD

A
Cheapest Retailer
-
$3,280 SGD
$2,565 USD
A
Retailer 2
-
$3,379 SGD
$2,642 USD
View
Final sale: no returns
A
Retailer 3
-
$3,398 SGD
$2,657 USD
View
Retailer 4
-
$3,490 SGD
$2,729 USD
View
Price last confirmed 84 days ago
A
Retailer 5
-
$3,587 SGD
$2,805 USD
View
Retailer 6
-
$3,661 SGD
$2,863 USD
View
Price last confirmed 37 days ago
A
Retailer 7
-
$3,661 SGD
$2,863 USD
View
A
Retailer 8
-
$3,802 SGD
$2,973 USD
View
A
Retailer 9
-
$3,843 SGD
$3,005 USD
View
A
Retailer 10
-
$3,961 SGD
£2,439 GBP
View
B+
Retailer 11
-
$4,017 SGD
$3,141 USD
View
B+
Retailer 12
-
$4,225 SGD
$3,304 USD
View
Retailer 13
-
$4,225 SGD
$3,304 USD
View
Price last confirmed 41 days ago
A
Retailer 14
-
$4,268 SGD
€3,178 EUR
View
B+
Retailer 15
-
$4,280 SGD
£2,635 GBP
View
A
Retailer 16
-
$4,374 SGD
£2,693 GBP
View
A
Retailer 17
-
$4,501 SGD
ZAR 56,858 ZAR
View
B+
Retailer 18
-
$6,123 SGD
£3,770 GBP
View
Retailer 19
-
$7,655 SGD
$5,986 USD
View
Price last confirmed 38 days ago
Most Expensive
B
NZ Jewellers
d4139d59-90a1-44fe-8074-bf5e2509c708 · Oct 30
$7,655 SGD
$5,986 USD
View
19 more retailers have this diamond
Prices start from $3,280 SGDSave up to $4,375 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
$3,280 SGD