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Round|Natural|GIA

1.51ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6425906823

Certificate GIA 6425906823

Diamond specifications and retailer prices

From $6,136 SGD
HK$37,500 HKD
As of November 1, 2026
Save $7,807 SGD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $13,944 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 GIA 6425906823. Listed at 19 retailers as of October 30, 2026, with prices from $6,136 to $13,944, a $7,807 spread on the same certified stone. NZ Jewellers lists it at $13,944. 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
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6425906823
Dimensions7.31 × 7.27 × 4.55 mm
L/W Ratio1.01
Top View
7.31 mm7.27 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6425906823
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $13,944 SGD|Low: $6,033 SGD|High: $13,944 SGD|Avg: $8,659 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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 15$6,136 SGD
Retailer 18$6,597 SGD
Retailer 5$6,971 SGD
Retailer 16$7,031 SGD
Retailer 6$7,553 SGD
Retailer 8$7,553 SGD
Retailer 19$7,553 SGD
Retailer 2$7,878 SGD
Retailer 7$8,425 SGD
Retailer 9$8,425 SGD
Retailer 11$8,427 SGD
Retailer 10$8,538 SGD
Retailer 17$8,706 SGD
Retailer 3$8,715 SGD
Retailer 12$9,069 SGD
Retailer 4$9,190 SGD
Retailer 14$10,243 SGD
Retailer 13$12,282 SGD
NZ Jewellers$13,944 SGD

43 data points across 19 retailers

19 retailers$6,136 SGD to $13,944 SGD

B+
Cheapest Retailer
-
$6,136 SGD
HK$37,500 HKD
B+
Retailer 2
-
$6,597 SGD
$5,160 USD
View
B
Retailer 3
-
$6,971 SGD
$5,453 USD
View
Final sale: no returns
B
Retailer 4
-
$7,031 SGD
$5,500 USD
View
B
Retailer 5
-
$7,553 SGD
$5,908 USD
View
B
Retailer 6
-
$7,553 SGD
$5,908 USD
View
B
Retailer 7
-
$7,553 SGD
$5,908 USD
View
B+
Retailer 8
-
$7,878 SGD
£4,852 GBP
View
B
Retailer 9
-
$8,425 SGD
$6,590 USD
View
B
Retailer 10
-
$8,425 SGD
$6,590 USD
View
Retailer 11
-
$8,427 SGD
A$10,142 AUD
View
Price last confirmed 29 days ago
B
Retailer 12
-
$8,538 SGD
$6,679 USD
View
B
Retailer 13
-
$8,706 SGD
$6,810 USD
View
B
Retailer 14
-
$8,715 SGD
$6,817 USD
View
B
Retailer 15
-
$9,069 SGD
€6,756 EUR
View
Retailer 16
-
$9,190 SGD
$7,189 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
$10,243 SGD
ZAR 129,441 ZAR
View
B
Retailer 18
-
$12,282 SGD
£7,565 GBP
View
Most Expensive
B
NZ Jewellers
69390dd0-34a5-44b5-99bc-6831c853a27d · Oct 30
$13,944 SGD
$10,907 USD
View
18 more retailers have this diamond
Prices start from $6,136 SGDSave up to $7,807 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.

B+
1.51ct Round
$6,136 SGD