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Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

ID • H/SI1 • GIA 2547417925

Certificate GIA 2547417925

Diamond specifications and retailer prices

From $1,168 AUD
£645 GBP
As of October 28, 2026
8 retailers carry this diamond
Most expensive: $2,204 AUD at MOH London · As of October 26, 2026
View at MOH London

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter 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 2547417925. Listed at 8 retailers as of October 28, 2026. 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

0.51
Carat
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2547417925
Dimensions8.00 × 4.13 × 2.65 mm
L/W Ratio1.94
Top View
8.00 mm4.13 mm0.51 ctH / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2547417925
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 64.3%

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: Oct 28
Current: $2,204 AUD|Low: $953 AUD|High: $2,249 AUD|Avg: $1,378 AUD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 28, 2026
Retailer 5$953 AUD
Retailer 6$1,142 AUD
Retailer 9$1,163 AUD
Retailer 2$1,168 AUD
Retailer 8$1,244 AUD
Retailer 3$1,351 AUD
Retailer 7$1,446 AUD
Retailer 4$1,468 AUD
MOH London$2,204 AUD

37 data points across 9 retailers

8 retailers

Retailer 1
-
$953 AUD
$668 USD
Price last confirmed 8 days ago
Retailer 2
-
$1,142 AUD
$800 USD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
$1,168 AUD
£645 GBP
View
Retailer 4
-
$1,244 AUD
£686 GBP
View
Price last confirmed 37 days ago
Retailer 5
-
$1,351 AUD
€902 EUR
View
Price last confirmed 7 days ago
Retailer 6
-
$1,446 AUD
View
Price last confirmed 30 days ago
Retailer 7
-
$1,468 AUD
ZAR 16,615 ZAR
View
Price last confirmed 7 days ago
Most Expensive
MOH London
FE39B73A6 · Oct 26
$2,204 AUD
£1,216 GBP
View
Price last confirmed 7 days ago
7 more retailers have this diamond
Prices start from $1,168 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+
0.51ct Marquise
$1,168 AUD