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Marquise|Natural|IGI

2.51ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 747550630

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 747550630

Diamond specifications and retailer prices

From £11,901 GBP
$15,970 USD
As of November 1, 2026
Save £6,415 GBP (35%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £18,316 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 747550630. Listed at 11 retailers as of November 1, 2026, with prices from £11,901 to £18,316, a £6,415 spread on the same certified stone. MOH London lists it at £18,316. 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

2.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 747550630
Dimensions12.88 × 6.98 × 4.68 mm
L/W Ratio1.85
Girdle conditionFaceted
Culet sizePointed
Top View
12.88 mm6.98 mm2.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 747550630
Side View
Table 57.0%Crown 39°Girdle: STK-THKPavilion 41.1°Culet: NoneDepth 67.0%

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: £18,316 GBP|Low: £11,654 GBP|High: £18,786 GBP|Avg: £14,172 GBP|+1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 4£11,654 GBP
Retailer 12£11,901 GBP
Retailer 13£12,405 GBP
Retailer 9£12,525 GBP
Retailer 11£12,945 GBP
Retailer 2£13,679 GBP
Retailer 8£13,808 GBP
Retailer 7£14,024 GBP
Retailer 6£14,226 GBP
Retailer 3£14,563 GBP
Retailer 5£15,564 GBP
Retailer 10£16,614 GBP
MOH London£18,316 GBP

36 data points across 13 retailers

11 retailers£11,901 GBP to £18,316 GBP

A
Cheapest Retailer
-
£11,901 GBP
$15,970 USD
A
Retailer 2
-
£12,405 GBP
$16,647 USD
View
Final sale: no returns
A
Retailer 3
-
£12,525 GBP
$16,808 USD
View
B+
Retailer 4
-
£12,945 GBP
$17,371 USD
View
A
Retailer 5
-
£13,679 GBP
View
B+
Retailer 6
-
£13,808 GBP
$18,529 USD
View
B+
Retailer 7
-
£14,024 GBP
$18,819 USD
View
A
Retailer 8
-
£14,226 GBP
€18,181 EUR
View
B+
Retailer 9
-
£14,563 GBP
$19,543 USD
View
B+
Retailer 10
-
£16,614 GBP
$22,295 USD
View
Most Expensive
B+
MOH London
BC8D35EA9 · Nov 1
£18,316 GBP
View
10 more retailers have this diamond
Prices start from £11,901 GBPSave up to £6,415 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
£11,901 GBP