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Marquise|Natural|GIA

2.50ct G SI1 Marquise Natural Diamond

VG • G/SI1 • GIA 2557186863

Certificate GIA 2557186863

Diamond specifications and retailer prices

From £20,998 GBP
CA$39,137 CAD
As of October 30, 2026
Save £6,384 GBP (23%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £27,382 GBP at Cape Diamonds · As of November 1, 2026
View at Cape Diamonds

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2557186863. Listed at 2 retailers as of October 30, 2026, with prices from £20,998 to £27,382, a £6,384 spread on the same certified stone. Cape Diamonds lists it at £27,382. 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
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle39.53°
Pavilion angle39.86°
OriginNatural
Grading LabGIA
CertificateGIA 2557186863
Dimensions12.87 × 6.94 × 4.50 mm
L/W Ratio1.85
Culet sizeNone
Top View
12.87 mm6.94 mm2.50 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2557186863
Side View
Table 56.0%Crown 39.53°Girdle: MED-VTKPavilion 39.86°Culet: NoneDepth 64.8%

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 30
Current: £27,382 GBP|Low: £12,950 GBP|High: £28,204 GBP|Avg: £20,304 GBP|+2.1%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 3£12,950 GBP
Retailer 10£15,858 GBP
Retailer 9£17,314 GBP
Retailer 7£18,036 GBP
Retailer 6£18,098 GBP
Retailer 5£20,062 GBP
Retailer 11£20,369 GBP
Retailer 2£20,998 GBP
Retailer 4£25,251 GBP
Cape Diamonds£27,382 GBP
Retailer 8£28,204 GBP

8 data points across 11 retailers

2 retailers£20,998 GBP to £27,382 GBP

B+
Cheapest Retailer
-
£20,998 GBP
CA$39,137 CAD
Most Expensive
B
Cape Diamonds
cert_2557186863 · Nov 1
£27,382 GBP
ZAR 593,627 ZAR
View
1 more retailer has this diamond
Prices start from £20,998 GBPSave up to £6,384 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
£20,998 GBP