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Marquise|Natural|GIA

0.40ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 6555816493

Certificate GIA 6555816493

Diamond specifications and retailer prices

From $479 AUD
SGD 455 SGD
As of November 2, 2026
Save $136 AUD (22%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $615 AUD at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6555816493. Listed at 2 retailers as of November 2, 2026, with prices from $479 to $615, a $136 spread on the same certified stone. 77 Diamonds lists it at $615. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6555816493
Dimensions6.85 × 3.89 × 2.53 mm
L/W Ratio1.76
Culet sizeNone
Key to symbols
Cloud, Crystal
Top View
6.85 mm3.89 mm0.40 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6555816493
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 65.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $615 AUD|Low: $479 AUD|High: $615 AUD|Avg: $540 AUD|+3.2%
77 Diamonds
Retailer 2
November 2, 2026
Retailer 2$479 AUD
77 Diamonds$615 AUD

39 data points across 2 retailers

2 retailers$479 AUD to $615 AUD

B+
Cheapest Retailer
-
$479 AUD
SGD 455 SGD
Most Expensive
B
77 Diamonds
MQCP34GN6WJV · Nov 2
$615 AUD
£340 GBP
View
1 more retailer has this diamond
Prices start from $479 AUDSave up to $136 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.

B+
0.40ct Marquise
$479 AUD