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Marquise|Natural|IGI

2.51ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 779663216

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 779663216

Diamond specifications and retailer prices

From $14,340 AUD
$10,050 USD
As of November 1, 2026
Save $6,030 AUD (30%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $20,370 AUD at The Diamond Guys · As of November 2, 2026
View at The Diamond Guys

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 779663216. Listed at 6 retailers as of November 1, 2026, with prices from $14,340 to $20,370, a $6,030 spread on the same certified stone. The Diamond Guys lists it at $20,370. 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
FluorescenceFaint
Crown angle40.1°
Pavilion angle40°
OriginNatural
Grading LabIGI
CertificateIGI 779663216
Dimensions14.13 × 6.95 × 4.18 mm
L/W Ratio2.03
Girdle conditionFaceted
Culet sizePointed
Top View
14.13 mm6.95 mm2.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 779663216
Side View
Table 63.0%Crown 40.1°Girdle: MED-THKPavilion 40°Culet: NoneDepth 60.1%

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: $16,819 AUD|Low: $12,888 AUD|High: $23,775 AUD|Avg: $17,876 AUD|-18.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
The Diamond Guys
November 2, 2026
Retailer 6$12,888 AUD
Retailer 3$14,340 AUD
Retailer 2$14,554 AUD
Retailer 5$16,786 AUD
Retailer 1$16,819 AUD
Retailer 4$17,685 AUD
The Diamond Guys$20,370 AUD
Retailer 7$23,775 AUD

32 data points across 8 retailers

6 retailers$14,340 AUD to $20,370 AUD

A
Cheapest Retailer
-
$14,340 AUD
$10,050 USD
A
Retailer 2
-
$14,554 AUD
$10,200 USD
View
A
Retailer 3
-
$16,786 AUD
$11,764 USD
View
A
Retailer 4
-
$16,819 AUD
€11,226 EUR
View
A
Retailer 5
-
$17,685 AUD
$12,394 USD
View
Most Expensive
B+
The Diamond Guys
1955283683 · Nov 2
$20,370 AUD
$14,276 USD
View
5 more retailers have this diamond
Prices start from $14,340 AUDSave up to $6,030 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
$14,340 AUD