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Marquise|Natural|GIA

0.40ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 2557344121

Certificate GIA 2557344121

Diamond specifications and retailer prices

From $548 AUD
HK$3,000 HKD
As of November 1, 2026
Save $493 AUD (47%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,307 AUD at MOH London · As of October 21, 2026
View at MOH London

About this 0.4ct natural marquise diamond

This 0.4ct natural marquise sits in the sub-half-carat band, graded H 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 2557344121. Listed at 16 retailers as of November 1, 2026, with a 90% 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557344121
Dimensions7.17 × 3.98 × 2.47 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Cavity
Top View
7.17 mm3.98 mm0.40 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557344121
Side View
Table 65.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.0%

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: $1,307 AUD|Low: $532 AUD|High: $2,202 AUD|Avg: $865 AUD|-5.3%
MOH London
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
November 2, 2026
Retailer 14$532 AUD
Retailer 10$548 AUD
Retailer 6$564 AUD
Retailer 4$606 AUD
Retailer 16$606 AUD
Retailer 5$613 AUD
Retailer 3$649 AUD
Retailer 15$649 AUD
Retailer 9$805 AUD
Retailer 11$887 AUD
Retailer 12$918 AUD
Retailer 8$929 AUD
Retailer 2$1,041 AUD
Retailer 13$1,139 AUD
MOH London$1,307 AUD
Retailer 7$2,157 AUD

39 data points across 16 retailers

16 retailers$548 AUD to $1,041 AUD

Retailer 1
-
$532 AUD
$373 USD
Price last confirmed 10 days ago
A
Retailer 2
-
$548 AUD
HK$3,000 HKD
View
Retailer 3
-
$564 AUD
$395 USD
View
Price last confirmed 11 days ago
Retailer 4
-
$606 AUD
$425 USD
View
Price last confirmed 17 days ago
Retailer 5
-
$606 AUD
$425 USD
View
Price last confirmed 10 days ago
Retailer 6
-
$613 AUD
SGD 581 SGD
View
Price last confirmed 10 days ago
Retailer 7
-
$649 AUD
$455 USD
View
Price last confirmed 12 days ago
Retailer 8
-
$649 AUD
$455 USD
View
Price last confirmed 10 days ago
B+
Retailer 9
-
$657 AUD
SGD 622 SGD
View
B
Retailer 10
-
$805 AUD
£444 GBP
View
B
Retailer 11
-
$887 AUD
£489 GBP
View
B
Retailer 12
-
$918 AUD
$643 USD
View
Retailer 13
-
$929 AUD
View
Price last confirmed 28 days ago
B
Retailer 14
-
$1,041 AUD
€695 EUR
View
Most Expensive
MOH London
2A1C03072 · Oct 21
$1,307 AUD
£721 GBP
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from $548 AUDSave up to $493 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
$548 AUD