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Marquise|Natural|GIA

2.51ct H SI2 Marquise Natural Diamond

ID • H/SI2 • GIA 6562556595

Certificate GIA 6562556595

Diamond specifications and retailer prices

From £13,688 GBP
$18,340 USD
As of October 31, 2026
Save £7,924 GBP (37%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £21,612 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6562556595. Listed at 6 retailers as of October 31, 2026, with prices from £13,688 to £21,612, a £7,924 spread on the same certified stone. MOH London lists it at £21,612. 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

2.51
Carat
H
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle43.13°
Pavilion angle41.36°
OriginNatural
Grading LabGIA
CertificateGIA 6562556595
Dimensions12.60 × 7.00 × 4.70 mm
L/W Ratio1.80
Girdle conditionExtremely Thick
Key to symbols
Twinning Wisp, Feather, Crystal, Indented Natural, Needle
Top View
12.60 mm7.00 mm2.51 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6562556595
Side View
Table 65.0%Crown 43.13°GirdlePavilion 41.36°CuletDepth 67.1%

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: Oct 31
Current: £21,612 GBP|Low: £13,688 GBP|High: £22,746 GBP|Avg: £17,594 GBP|-5.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4£13,688 GBP
Retailer 2£15,921 GBP
Retailer 5£16,039 GBP
Retailer 6£16,548 GBP
Retailer 3£19,604 GBP
MOH London£21,612 GBP

22 data points across 6 retailers

6 retailers£13,688 GBP to £21,612 GBP

A
Cheapest Retailer
-
£13,688 GBP
$18,340 USD
A
Retailer 2
-
£15,921 GBP
View
A
Retailer 3
-
£16,039 GBP
$21,490 USD
View
B+
Retailer 4
-
£16,548 GBP
$22,172 USD
View
B+
Retailer 5
-
£19,604 GBP
$26,267 USD
View
Most Expensive
B
MOH London
720699669 · Nov 1
£21,612 GBP
View
5 more retailers have this diamond
Prices start from £13,688 GBPSave up to £7,924 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.

A
2.51ct Marquise
£13,688 GBP