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Marquise|Natural|GIA

2.50ct H SI2 Marquise Natural Diamond

H/SI2

Diamond specifications and retailer prices

From £20,035 GBP
CA$37,283 CAD
As of October 30, 2026
Save £4,809 GBP (19%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £24,844 GBP at The Diamond Guys · As of October 31, 2026
View at The Diamond Guys

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included) and certified by GIA. Listed at 7 retailers as of October 30, 2026, with prices from £20,035 to £24,844, a £4,809 spread on the same certified stone. The Diamond Guys lists it at £24,844. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

2.50
Carat
H
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions13.78 × 7.17 × 4.28 mm
L/W Ratio1.92
Top View
13.78 mm7.17 mm2.50 ctH / SI2
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA
Side View
Table 64.0%CrownGirdle: Slightly ThickPavilionCuletDepth 59.7%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £21,936 GBP|Low: £20,035 GBP|High: £24,844 GBP|Avg: £22,628 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
The Diamond Guys
October 16, 2026
Retailer 5£20,035 GBP
Retailer 3£21,761 GBP
Retailer 1£21,936 GBP
Retailer 2£22,632 GBP
Retailer 6£23,131 GBP
Retailer 4£23,503 GBP
The Diamond Guys£24,844 GBP

5 data points across 7 retailers

7 retailers£20,035 GBP to £24,844 GBP

B
Cheapest Retailer
-
£20,035 GBP
CA$37,283 CAD
B
Retailer 2
-
£21,761 GBP
$29,158 USD
View
B
Retailer 3
-
£21,936 GBP
$29,392 USD
View
C
Retailer 4
-
£22,632 GBP
$30,325 USD
View
B
Retailer 5
-
£23,131 GBP
$30,993 USD
View
B
Retailer 6
-
£23,503 GBP
$31,491 USD
View
Most Expensive
C
The Diamond Guys
1975800448 · Oct 31
£24,844 GBP
$33,288 USD
View
6 more retailers have this diamond
Prices start from £20,035 GBPSave up to £4,809 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
2.50ct Marquise
£20,035 GBP