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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 $10,986 USD
£8,650 GBP
As of November 1, 2026
Save $4,711 USD (30%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $15,697 USD 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 $10,986 to $15,697, a $4,711 spread on the same certified stone. NZ Jewellers lists it at $15,697. 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
Color
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 1
Current: $15,697 USD|Low: $9,700 USD|High: $15,924 USD|Avg: $12,074 USD|-1.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6$9,700 USD
Retailer 7$9,891 USD
Retailer 3$10,986 USD
Retailer 4$11,262 USD
Retailer 5$11,436 USD
Retailer 2$14,709 USD
NZ Jewellers$15,697 USD

31 data points across 7 retailers

6 retailers$10,986 USD to $15,697 USD

Retailer 1
-
$9,700 USD
Price last confirmed 15 days ago
A
Retailer 2
-
$10,986 USD
£8,650 GBP
View
A
Retailer 3
-
$11,262 USD
View
A
Retailer 4
-
$11,436 USD
View
B+
Retailer 5
-
$14,709 USD
£11,582 GBP
View
Most Expensive
B+
NZ Jewellers
b968ba44-c5ef-48bc-857d-46f9ad5f5d47 · Oct 30
$15,697 USD
View
5 more retailers have this diamond
Prices start from $10,986 USDSave up to $4,711 USD

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
$10,986 USD