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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 £610 GBP
As of October 28, 2026
Save £96 GBP (14%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,151 GBP 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 26, 2026, with a relatively tight 16% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: £1,151 GBP|Low: £498 GBP|High: £1,174 GBP|Avg: £719 GBP|-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£498 GBP
Retailer 6£596 GBP
Retailer 9£607 GBP
Retailer 2£610 GBP
Retailer 8£650 GBP
Retailer 3£706 GBP
Retailer 7£755 GBP
Retailer 4£766 GBP
MOH London£1,151 GBP

38 data points across 9 retailers

8 retailers£610 GBP to £706 GBP

Retailer 1
-
£498 GBP
$668 USD
Price last confirmed 8 days ago
Retailer 2
-
£596 GBP
$800 USD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
£610 GBP
View
Retailer 4
-
£650 GBP
View
Price last confirmed 37 days ago
B+
Retailer 5
-
£706 GBP
€902 EUR
View
Retailer 6
-
£755 GBP
A$1,560 AUD
View
Price last confirmed 29 days ago
Retailer 7
-
£766 GBP
ZAR 16,615 ZAR
View
Price last confirmed 7 days ago
Most Expensive
MOH London
FE39B73A6 · Oct 26
£1,151 GBP
View
Price last confirmed 7 days ago
7 more retailers have this diamond
Prices start from £610 GBPSave up to £96 GBP

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
£610 GBP