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Marquise|Natural|GIA

0.40ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6545323759

Certificate GIA 6545323759

Diamond specifications and retailer prices

From $361 AUD
₹24,113 INR
As of November 2, 2026
Save $692 AUD (66%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,747 AUD 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 I 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 6545323759. Listed at 16 retailers as of November 1, 2026, with a 191% 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceFaint
Crown angle38°
Pavilion angle39.66°
OriginNatural
Grading LabGIA
CertificateGIA 6545323759
Dimensions7.41 × 3.90 × 2.44 mm
L/W Ratio1.90
Top View
7.41 mm3.90 mm0.40 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceFaint
CertificateGIA 6545323759
Side View
Table 58.0%Crown 38°Girdle: THN-THKPavilion 39.66°Culet: NoneDepth 62.6%

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: $361 AUD|Low: $361 AUD|High: $1,064 AUD|Avg: $727 AUD|-3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 1$361 AUD
Retailer 4$586 AUD
Retailer 5$706 AUD
Retailer 7$771 AUD
Retailer 3$854 AUD
Retailer 2$922 AUD
Retailer 6$1,053 AUD

29 data points across 7 retailers

16 retailers$361 AUD to $1,053 AUD

A
Cheapest Retailer
-
$361 AUD
₹24,113 INR
A
Retailer 2
-
$455 AUD
$319 USD
View
A
Retailer 3
-
$491 AUD
$344 USD
View
A
Retailer 4
-
$508 AUD
$356 USD
View
B+
Retailer 5
-
$525 AUD
$368 USD
View
B+
Retailer 6
-
$586 AUD
£323 GBP
View
B+
Retailer 7
-
$614 AUD
$430 USD
View
B+
Retailer 8
-
$642 AUD
$450 USD
View
B+
Retailer 9
-
$706 AUD
ZAR 7,998 ZAR
View
B
Retailer 10
-
$713 AUD
$500 USD
View
Retailer 11
-
$730 AUD
View
Price last confirmed 29 days ago
B
Retailer 12
-
$771 AUD
$540 USD
View
B
Retailer 13
-
$854 AUD
€570 EUR
View
B
Retailer 14
-
$922 AUD
£509 GBP
View
B
Retailer 15
-
$1,053 AUD
£581 GBP
View
Most Expensive
NZ Jewellers
433b11c4-d491-433a-a236-ff45f3c0c487 · Oct 30
$1,747 AUD
$1,224 USD
View
Price under review
15 more retailers have this diamond
Prices start from $361 AUDSave up to $692 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
$361 AUD