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Marquise|Natural|GIA

2.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2567198254

Certificate GIA 2567198254

Diamond specifications and retailer prices

From £17,676 GBP
₹2,259,046 INR
As of November 3, 2026
Save £3,234 GBP (15%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £20,910 GBP at 77 Diamonds · As of November 3, 2026
View at 77 Diamonds

About this 2.5ct natural marquise diamond

This 2.5ct natural marquise sits in the two to three carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2567198254. Listed at 3 retailers as of November 3, 2026, with prices from £17,676 to £20,910, a £3,234 spread on the same certified stone. 77 Diamonds lists it at £20,910. 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

2.50
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2567198254
Dimensions13.32 × 7.13 × 4.31 mm
L/W Ratio1.87
Top View
13.32 mm7.13 mm2.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 2567198254
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 60.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: £20,910 GBP|Low: £17,646 GBP|High: £21,122 GBP|Avg: £19,267 GBP|-0.7%
77 Diamonds
Retailer 2
Retailer 3
November 3, 2026
Retailer 2£17,676 GBP
Retailer 3£17,960 GBP
77 Diamonds£20,910 GBP

35 data points across 3 retailers

3 retailers£17,676 GBP to £20,910 GBP

B+
Cheapest Retailer
-
£17,676 GBP
₹2,259,046 INR
B+
Retailer 2
-
£17,960 GBP
CA$33,474 CAD
View
Most Expensive
B
77 Diamonds
MQMBR5E4RQSA · Nov 3
£20,910 GBP
View
2 more retailers have this diamond
Prices start from £17,676 GBPSave up to £3,234 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
£17,676 GBP