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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 $472 AUD
$331 USD
As of November 1, 2026
Save $620 AUD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,812 AUD at NZ Jewellers · As of November 3, 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $1,812 AUD|Low: $472 AUD|High: $1,812 AUD|Avg: $807 AUD
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
November 3, 2026
Retailer 10$472 AUD
Retailer 7$528 AUD
Retailer 3$545 AUD
Retailer 5$555 AUD
Retailer 2$605 AUD
Retailer 6$636 AUD
Retailer 9$659 AUD
Retailer 13$711 AUD
Retailer 11$785 AUD
Retailer 4$800 AUD
Retailer 14$882 AUD
Retailer 8$957 AUD
Retailer 12$1,093 AUD
NZ Jewellers$1,812 AUD

31 data points across 14 retailers

15 retailers$472 AUD to $1,093 AUD

A
Cheapest Retailer
-
$472 AUD
$331 USD
B+
Retailer 2
-
$528 AUD
$370 USD
View
B+
Retailer 3
-
$545 AUD
$382 USD
View
B+
Retailer 4
-
$555 AUD
$389 USD
View
B+
Retailer 5
-
$605 AUD
£334 GBP
View
B+
Retailer 6
-
$636 AUD
$446 USD
View
B+
Retailer 7
-
$659 AUD
$462 USD
View
B
Retailer 8
-
$711 AUD
$498 USD
View
B
Retailer 9
-
$785 AUD
$550 USD
View
B
Retailer 10
-
$800 AUD
ZAR 9,059 ZAR
View
Retailer 11
-
$827 AUD
View
Price last confirmed 30 days ago
B
Retailer 12
-
$882 AUD
€589 EUR
View
B
Retailer 13
-
$957 AUD
£528 GBP
View
B
Retailer 14
-
$1,093 AUD
£603 GBP
View
Most Expensive
NZ Jewellers
982d8690-a459-4ed2-acf7-78356171462e · Nov 3
$1,812 AUD
$1,270 USD
View
Price under review
14 more retailers have this diamond
Prices start from $472 AUDSave up to $620 AUD

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
$472 AUD