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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 $22,735 AUD
$15,970 USD
As of November 1, 2026
Save $12,255 AUD (35%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $34,990 AUD 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 $22,735 to $34,990, a $12,255 spread on the same certified stone. MOH London lists it at $34,990. 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: $34,990 AUD|Low: $22,264 AUD|High: $35,888 AUD|Avg: $27,073 AUD|+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$22,264 AUD
Retailer 12$22,735 AUD
Retailer 13$23,699 AUD
Retailer 9$23,927 AUD
Retailer 11$24,729 AUD
Retailer 6$26,134 AUD
Retailer 8$26,378 AUD
Retailer 7$26,791 AUD
Retailer 2$27,177 AUD
Retailer 3$27,821 AUD
Retailer 5$29,733 AUD
Retailer 10$31,739 AUD
MOH London$34,990 AUD

36 data points across 13 retailers

11 retailers$22,735 AUD to $34,990 AUD

A
Cheapest Retailer
-
$22,735 AUD
$15,970 USD
A
Retailer 2
-
$23,699 AUD
$16,647 USD
View
Final sale: no returns
A
Retailer 3
-
$23,927 AUD
$16,808 USD
View
B+
Retailer 4
-
$24,729 AUD
$17,371 USD
View
A
Retailer 5
-
$26,134 AUD
£14,455 GBP
View
B+
Retailer 6
-
$26,378 AUD
$18,529 USD
View
B+
Retailer 7
-
$26,791 AUD
$18,819 USD
View
A
Retailer 8
-
$27,177 AUD
€18,181 EUR
View
B+
Retailer 9
-
$27,821 AUD
$19,543 USD
View
B+
Retailer 10
-
$31,739 AUD
$22,295 USD
View
Most Expensive
B+
MOH London
BC8D35EA9 · Nov 1
$34,990 AUD
£19,353 GBP
View
10 more retailers have this diamond
Prices start from $22,735 AUDSave up to $12,255 AUD

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
$22,735 AUD