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Marquise|Natural|GIA

2.51ct H SI2 Marquise Natural Diamond

ID • H/SI2 • GIA 2564718645

Certificate GIA 2564718645

Diamond specifications and retailer prices

From £16,552 GBP
SGD 29,970 SGD
As of November 1, 2026
Save £4,700 GBP (22%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £21,252 GBP at Frank Darling · As of November 1, 2026
View at Frank Darling

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 2564718645. Listed at 6 retailers as of November 1, 2026, with prices from £16,552 to £21,252, a £4,700 spread on the same certified stone. Frank Darling lists it at £21,252. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2564718645
Dimensions14.31 × 6.76 × 4.27 mm
L/W Ratio2.12
Top View
14.31 mm6.76 mm2.51 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2564718645
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.1%

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: Nov 1
Current: £21,252 GBP|Low: £16,552 GBP|High: £21,252 GBP|Avg: £18,465 GBP
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 6£16,552 GBP
Retailer 2£17,747 GBP
Retailer 3£18,064 GBP
Retailer 4£18,204 GBP
Retailer 5£18,886 GBP
Frank Darling£21,252 GBP

5 data points across 6 retailers

6 retailers£16,552 GBP to £21,252 GBP

A
Cheapest Retailer
-
£16,552 GBP
SGD 29,970 SGD
B+
Retailer 2
-
£17,747 GBP
View
B+
Retailer 3
-
£18,064 GBP
$24,203 USD
View
B+
Retailer 4
-
£18,204 GBP
$24,391 USD
View
B+
Retailer 5
-
£18,886 GBP
$25,305 USD
View
Most Expensive
B
Frank Darling
260646-77HK · Nov 1
£21,252 GBP
$28,475 USD
View
5 more retailers have this diamond
Prices start from £16,552 GBPSave up to £4,700 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
£16,552 GBP