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Marquise|Natural|IGI

2.51ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 836680373

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 836680373

Diamond specifications and retailer prices

From $17,534 NZD
As of November 5, 2026
Save $9,071 NZD (34%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $26,605 NZD at MOH London · As of November 2, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 836680373. Listed at 4 retailers as of November 2, 2026, with prices from $17,534 to $26,605, a $9,071 spread on the same certified stone. MOH London lists it at $26,605. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle45.2°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 836680373
Dimensions12.85 × 6.80 × 4.61 mm
L/W Ratio1.89
Girdle conditionFaceted
Top View
12.85 mm6.80 mm2.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 836680373
Side View
Table 64.0%Crown 45.2°Girdle: STK-THKPavilion 41.7°CuletDepth 67.8%

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 5
Current: $26,605 NZD|Low: $17,534 NZD|High: $28,325 NZD|Avg: $20,721 NZD|-6.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 4$17,534 NZD
Retailer 3$18,580 NZD
Retailer 2$19,598 NZD
MOH London$26,605 NZD

17 data points across 4 retailers

4 retailers$17,534 NZD to $26,605 NZD

A
Cheapest Retailer
-
$17,534 NZD
A
Retailer 2
-
$18,580 NZD
View
A
Retailer 3
-
$19,598 NZD
View
Most Expensive
B+
MOH London
90C788914 · Nov 2
$26,605 NZD
£11,613 GBP
View
3 more retailers have this diamond
Prices start from $17,534 NZDSave up to $9,071 NZD

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
$17,534 NZD