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Marquise|Natural|IGI

2.51ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 782658126

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 782658126

Diamond specifications and retailer prices

From $15,675 AUD
£8,650 GBP
As of November 2, 2026
Save $6,723 AUD (30%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $22,398 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 782658126. Listed at 6 retailers as of October 30, 2026, with prices from $15,675 to $22,398, a $6,723 spread on the same certified stone. NZ Jewellers lists it at $22,398. 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 angle41.4°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 782658126
Dimensions12.43 × 6.96 × 4.79 mm
L/W Ratio1.79
Girdle conditionFaceted
Culet sizePointed
Top View
12.43 mm6.96 mm2.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 782658126
Side View
Table 54.0%Crown 41.4°Girdle: THK-VTKPavilion 40.8°Culet: NoneDepth 68.8%

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 2
Current: $22,398 AUD|Low: $13,841 AUD|High: $22,722 AUD|Avg: $17,223 AUD|-1.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 6$13,841 AUD
Retailer 7$14,113 AUD
Retailer 2$15,675 AUD
Retailer 4$16,070 AUD
Retailer 5$16,318 AUD
Retailer 3$20,988 AUD
NZ Jewellers$22,398 AUD

32 data points across 7 retailers

6 retailers$15,675 AUD to $22,398 AUD

Retailer 1
-
$13,841 AUD
$9,700 USD
Price last confirmed 17 days ago
A
Retailer 2
-
$15,675 AUD
£8,650 GBP
View
A
Retailer 3
-
$16,070 AUD
$11,262 USD
View
A
Retailer 4
-
$16,318 AUD
$11,436 USD
View
B+
Retailer 5
-
$20,988 AUD
£11,582 GBP
View
Most Expensive
B+
NZ Jewellers
b968ba44-c5ef-48bc-857d-46f9ad5f5d47 · Oct 30
$22,398 AUD
$15,697 USD
View
5 more retailers have this diamond
Prices start from $15,675 AUDSave up to $6,723 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
$15,675 AUD