CaratHunter
Plans
Marquise|Natural|GIA

2.51ct D SI2 Marquise Natural Diamond

EX • D/SI2

Diamond specifications and retailer prices

From £23,018 GBP
$30,841 USD
As of October 31, 2026
Save £8,315 GBP (27%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £31,332 GBP at The Diamond Guys · As of October 31, 2026
View at The Diamond Guys

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 6 retailers as of October 31, 2026, with prices from £23,018 to £31,332, a £8,315 spread on the same certified stone. The Diamond Guys lists it at £31,332. 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
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
Dimensions12.90 × 7.02 × 4.46 mm
L/W Ratio1.84
Top View
12.90 mm7.02 mm2.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA
Side View
Table 57.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 63.6%

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: £29,438 GBP|Low: £22,803 GBP|High: £31,332 GBP|Avg: £27,794 GBP|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
The Diamond Guys
November 1, 2026
Retailer 3£23,018 GBP
Retailer 5£25,266 GBP
Retailer 2£26,270 GBP
Retailer 6£29,171 GBP
Retailer 1£29,438 GBP
Retailer 4£29,599 GBP
The Diamond Guys£31,332 GBP

41 data points across 7 retailers

6 retailers£23,018 GBP to £31,332 GBP

A
Cheapest Retailer
-
£23,018 GBP
$30,841 USD
B+
Retailer 2
-
£25,266 GBP
CA$47,019 CAD
View
B+
Retailer 3
-
£26,270 GBP
$35,199 USD
View
B
Retailer 4
-
£29,171 GBP
$39,086 USD
View
B
Retailer 5
-
£29,438 GBP
View
Most Expensive
B
The Diamond Guys
1965159174 · Oct 31
£31,332 GBP
$41,982 USD
View
5 more retailers have this diamond
Prices start from £23,018 GBPSave up to £8,315 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
£23,018 GBP