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Marquise|Natural|GIA

0.40ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 1559930271

Certificate GIA 1559930271

Diamond specifications and retailer prices

From $399 AUD
₹26,676 INR
As of November 2, 2026
Save $578 AUD (59%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,031 AUD at Torres Jewel Co · As of September 23, 2026
View at Torres Jewel Co

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 1559930271. Listed at 14 retailers as of November 2, 2026, with a 145% 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1559930271
Dimensions3.65 × 8.26 × 2.34 mm
L/W Ratio2.26
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather
Top View
3.65 mm8.26 mm0.40 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1559930271
Side View
Table 55.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.1%

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 2
Current: $399 AUD|Low: $398 AUD|High: $2,517 AUD|Avg: $846 AUD|-4.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Torres Jewel Co
November 2, 2026
Retailer 1$399 AUD
Retailer 13$474 AUD
Retailer 7$505 AUD
Retailer 8$519 AUD
Retailer 12$562 AUD
Retailer 10$583 AUD
Retailer 3$656 AUD
Retailer 11$749 AUD
Retailer 4$757 AUD
Retailer 9$833 AUD
Retailer 2$929 AUD
Retailer 6$977 AUD
Torres Jewel Co$1,031 AUD
Retailer 5$2,517 AUD

41 data points across 14 retailers

14 retailers$399 AUD to $977 AUD

A
Cheapest Retailer
-
$399 AUD
₹26,676 INR
A
Retailer 2
-
$474 AUD
HK$2,600 HKD
View
A
Retailer 3
-
$505 AUD
$355 USD
View
A
Retailer 4
-
$519 AUD
SGD 493 SGD
View
B+
Retailer 5
-
$562 AUD
$395 USD
View
B+
Retailer 6
-
$583 AUD
SGD 553 SGD
View
Retailer 7
-
$656 AUD
$461 USD
View
Price last confirmed 41 days ago
B
Retailer 8
-
$749 AUD
$526 USD
View
Retailer 9
-
$757 AUD
$532 USD
View
Price last confirmed 41 days ago
B
Retailer 10
-
$833 AUD
$585 USD
View
Retailer 11
-
$929 AUD
£514 GBP
View
Price last confirmed 39 days ago
B
Retailer 12
-
$977 AUD
£540 GBP
View
Most Expensive
Torres Jewel Co
25273083 · Sep 23
$1,031 AUD
View
Price last confirmed 39 days ago
12 more retailers have this diamond
Prices start from $399 AUDSave up to $578 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
$399 AUD