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Marquise|Natural|GIA

0.42ct H SI1 Marquise Natural Diamond

VG • H/SI1 • GIA 6555539439

Certificate GIA 6555539439

Diamond specifications and retailer prices

From $525 AUD
$368 USD
As of November 2, 2026
Save $925 AUD (64%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,450 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 0.42ct natural marquise diamond

This 0.42ct natural marquise sits in the sub-half-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6555539439. Listed at 21 retailers as of November 2, 2026, with prices from $525 to $1,450, a $925 spread on the same certified stone. MOH London lists it at $1,450. 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

0.42
Carat
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle38.3°
Pavilion angle38.1°
OriginNatural
Grading LabGIA
CertificateGIA 6555539439
Dimensions7.58 × 3.95 × 2.43 mm
L/W Ratio1.92
Girdle conditionFaceted
Top View
7.58 mm3.95 mm0.42 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6555539439
Side View
Table 57.0%Crown 38.3°Girdle: STK-VTKPavilion 38.1°Culet: NoneDepth 61.6%

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: $1,450 AUD|Low: $525 AUD|High: $2,486 AUD|Avg: $861 AUD|-4.8%
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 2, 2026
Retailer 10$525 AUD
Retailer 14$528 AUD
Retailer 6$569 AUD
Retailer 12$603 AUD
Retailer 9$612 AUD
Retailer 11$612 AUD
Retailer 4$656 AUD
Retailer 18$661 AUD
Retailer 5$678 AUD
Retailer 15$711 AUD
Retailer 7$726 AUD
Retailer 13$780 AUD
Retailer 20$787 AUD
Retailer 16$870 AUD
Retailer 8$949 AUD
Retailer 17$954 AUD
Retailer 19$974 AUD
Retailer 2$1,271 AUD
MOH London$1,450 AUD
Retailer 3$2,407 AUD

24 data points across 20 retailers

21 retailers$525 AUD to $1,450 AUD

A
Cheapest Retailer
-
$525 AUD
$368 USD
Final sale: no returns
A
Retailer 2
-
$528 AUD
$370 USD
View
B+
Retailer 3
-
$569 AUD
$399 USD
View
B+
Retailer 4
-
$603 AUD
HK$3,300 HKD
View
B+
Retailer 5
-
$612 AUD
$429 USD
View
B+
Retailer 6
-
$612 AUD
$429 USD
View
B+
Retailer 7
-
$656 AUD
$460 USD
View
B+
Retailer 8
-
$661 AUD
$463 USD
View
B+
Retailer 9
-
$678 AUD
$475 USD
View
B+
Retailer 10
-
$711 AUD
$498 USD
View
B
Retailer 11
-
$726 AUD
$509 USD
View
B
Retailer 12
-
$780 AUD
£431 GBP
View
B
Retailer 13
-
$787 AUD
£434 GBP
View
B
Retailer 14
-
$870 AUD
$610 USD
View
B
Retailer 15
-
$949 AUD
$665 USD
View
B
Retailer 16
-
$954 AUD
€637 EUR
View
B
Retailer 17
-
$974 AUD
ZAR 11,024 ZAR
View
Retailer 18
-
$1,052 AUD
View
Price last confirmed 30 days ago
B
Retailer 19
-
$1,271 AUD
£701 GBP
View
Most Expensive
B
MOH London
9FE4C0FFA · Nov 2
$1,450 AUD
£800 GBP
View
19 more retailers have this diamond
Prices start from $525 AUDSave up to $925 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
0.42ct Marquise
$525 AUD