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Marquise|Natural|GIA

0.40ct J SI1 Marquise Natural Diamond

GD • J/SI1 • GIA 6321443750

Certificate GIA 6321443750

Diamond specifications and retailer prices

From $511 AUD
HK$2,800 HKD
As of November 1, 2026
Save $900 AUD (64%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,412 AUD at MOH London · As of November 2, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6321443750. Listed at 16 retailers as of November 1, 2026, with prices from $511 to $1,412, a $900 spread on the same certified stone. MOH London lists it at $1,412. 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
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6321443750
Dimensions6.53 × 3.83 × 2.70 mm
L/W Ratio1.70
Top View
6.53 mm3.83 mm0.40 ctJ / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6321443750
Side View
Table 58.0%CrownGirdlePavilionCulet: NoneDepth 70.5%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: $1,412 AUD|Low: $511 AUD|High: $2,342 AUD|Avg: $905 AUD|-0.9%
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 6$511 AUD
Retailer 5$542 AUD
Retailer 14$611 AUD
Retailer 12$658 AUD
Retailer 13$658 AUD
Retailer 7$669 AUD
Retailer 16$705 AUD
Retailer 9$758 AUD
Retailer 8$798 AUD
Retailer 3$828 AUD
Retailer 4$913 AUD
Retailer 10$930 AUD
Retailer 11$947 AUD
Retailer 2$1,236 AUD
MOH London$1,412 AUD
Retailer 15$2,342 AUD

26 data points across 16 retailers

16 retailers$511 AUD to $1,412 AUD

B+
Cheapest Retailer
-
$511 AUD
HK$2,800 HKD
B+
Retailer 2
-
$542 AUD
$380 USD
View
B
Retailer 3
-
$611 AUD
$428 USD
View
B
Retailer 4
-
$640 AUD
SGD 606 SGD
View
B
Retailer 5
-
$658 AUD
$461 USD
View
B
Retailer 6
-
$658 AUD
$461 USD
View
B
Retailer 7
-
$705 AUD
$494 USD
View
B
Retailer 8
-
$758 AUD
£418 GBP
View
B
Retailer 9
-
$798 AUD
$559 USD
View
B
Retailer 10
-
$828 AUD
$580 USD
View
C
Retailer 11
-
$913 AUD
$640 USD
View
C
Retailer 12
-
$930 AUD
€621 EUR
View
C
Retailer 13
-
$947 AUD
ZAR 10,725 ZAR
View
C
Retailer 14
-
$1,236 AUD
£682 GBP
View
Most Expensive
C
MOH London
86C62FB86 · Nov 2
$1,412 AUD
£779 GBP
View
14 more retailers have this diamond
Prices start from $511 AUDSave up to $900 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
$511 AUD