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Marquise|Natural|GIA

0.40ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 6552425978

Certificate GIA 6552425978

Diamond specifications and retailer prices

From $423 SGD
$331 USD
As of November 1, 2026
Save $556 SGD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,624 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.4ct natural marquise diamond

This 0.4ct natural marquise sits in the sub-half-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552425978. Listed at 15 retailers as of November 1, 2026, with a 131% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.40
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
Crown angle31.3°
Pavilion angle41.7°
OriginNatural
Grading LabGIA
CertificateGIA 6552425978
Dimensions7.56 × 3.86 × 2.39 mm
L/W Ratio1.96
Girdle conditionPolished
Top View
7.56 mm3.86 mm0.40 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 6552425978
Side View
Table 57.0%Crown 31.3°Girdle: VTK-XTKPavilion 41.7°Culet: NoneDepth 61.9%

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: $1,624 SGD|Low: $423 SGD|High: $1,624 SGD|Avg: $726 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 11$423 SGD
Retailer 2$473 SGD
Retailer 3$489 SGD
Retailer 5$497 SGD
Retailer 9$547 SGD
Retailer 6$570 SGD
Retailer 10$591 SGD
Retailer 14$637 SGD
Retailer 12$703 SGD
Retailer 4$717 SGD
Retailer 7$741 SGD
Retailer 15$791 SGD
Retailer 8$858 SGD
Retailer 13$979 SGD
NZ Jewellers$1,624 SGD

31 data points across 15 retailers

15 retailers$423 SGD to $979 SGD

A
Cheapest Retailer
-
$423 SGD
$331 USD
B+
Retailer 2
-
$473 SGD
$370 USD
View
B+
Retailer 3
-
$489 SGD
$382 USD
View
B+
Retailer 4
-
$497 SGD
$389 USD
View
B+
Retailer 5
-
$547 SGD
£337 GBP
View
B+
Retailer 6
-
$570 SGD
$446 USD
View
B+
Retailer 7
-
$591 SGD
$462 USD
View
B
Retailer 8
-
$637 SGD
$498 USD
View
B
Retailer 9
-
$703 SGD
$550 USD
View
B
Retailer 10
-
$717 SGD
ZAR 9,059 ZAR
View
Retailer 11
-
$741 SGD
A$891 AUD
View
Price last confirmed 30 days ago
B
Retailer 12
-
$791 SGD
€589 EUR
View
B
Retailer 13
-
$858 SGD
£528 GBP
View
B
Retailer 14
-
$979 SGD
£603 GBP
View
Most Expensive
NZ Jewellers
982d8690-a459-4ed2-acf7-78356171462e · Oct 30
$1,624 SGD
$1,270 USD
View
Price under review
14 more retailers have this diamond
Prices start from $423 SGDSave up to $556 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
0.40ct Marquise
$423 SGD