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Marquise|Natural|GIA

0.30ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 1242031130

Certificate GIA 1242031130

Diamond specifications and retailer prices

From $511 AUD
$358 USD
As of November 1, 2026
Save $582 AUD (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,247 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 0.3ct natural marquise diamond

This 0.3ct 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 1242031130. Listed at 16 retailers as of November 1, 2026, with a 114% 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

0.30
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1242031130
Dimensions7.13 × 3.40 × 2.14 mm
L/W Ratio2.10
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
7.13 mm3.40 mm0.30 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242031130
Side View
Table 59.0%CrownGirdle: VTK-VTKPavilionCulet: NoneDepth 62.8%

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: $1,247 AUD|Low: $511 AUD|High: $1,261 AUD|Avg: $897 AUD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 3, 2026
Retailer 7$511 AUD
Retailer 2$703 AUD
Retailer 6$740 AUD
Retailer 5$837 AUD
Retailer 8$865 AUD
Retailer 4$891 AUD
Retailer 3$1,092 AUD
MOH London$1,247 AUD

37 data points across 8 retailers

16 retailers$511 AUD to $1,092 AUD

B+
Cheapest Retailer
-
$511 AUD
$358 USD
B+
Retailer 2
-
$539 AUD
$378 USD
View
B+
Retailer 3
-
$567 AUD
SGD 537 SGD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
$581 AUD
$407 USD
View
B+
Retailer 5
-
$602 AUD
$422 USD
View
B
Retailer 6
-
$703 AUD
£388 GBP
View
B
Retailer 7
-
$726 AUD
$509 USD
View
B
Retailer 8
-
$726 AUD
$509 USD
View
B
Retailer 9
-
$740 AUD
£408 GBP
View
B
Retailer 10
-
$777 AUD
$545 USD
View
B
Retailer 11
-
$837 AUD
ZAR 9,475 ZAR
View
Retailer 12
-
$865 AUD
View
Price last confirmed 30 days ago
B
Retailer 13
-
$891 AUD
€595 EUR
View
B
Retailer 14
-
$1,092 AUD
£603 GBP
View
Most Expensive
MOH London
5A6AADB02 · Nov 2
$1,247 AUD
£688 GBP
View
Price under review
14 more retailers have this diamond
Prices start from $511 AUDSave up to $582 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+
0.30ct Marquise
$511 AUD