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Marquise|Natural|GIA

2.51ct D SI2 Marquise Natural Diamond

EX • D/SI2

Diamond specifications and retailer prices

From $44,007 AUD
$30,841 USD
As of November 2, 2026
Save $15,897 AUD (27%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $59,904 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 6 retailers as of November 2, 2026, with prices from $44,007 to $59,904, a $15,897 spread on the same certified stone. The Diamond Guys lists it at $59,904. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.51
Carat
D
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
Dimensions12.90 × 7.02 × 4.46 mm
L/W Ratio1.84
Top View
12.90 mm7.02 mm2.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA
Side View
Table 57.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 63.6%

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: $56,278 AUD|Low: $43,596 AUD|High: $59,904 AUD|Avg: $53,137 AUD|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
The Diamond Guys
November 2, 2026
Retailer 3$44,007 AUD
Retailer 5$48,306 AUD
Retailer 2$50,225 AUD
Retailer 6$55,772 AUD
Retailer 1$56,278 AUD
Retailer 4$56,591 AUD
The Diamond Guys$59,904 AUD

42 data points across 7 retailers

6 retailers$44,007 AUD to $59,904 AUD

A
Cheapest Retailer
-
$44,007 AUD
$30,841 USD
B+
Retailer 2
-
$48,306 AUD
CA$47,019 CAD
View
B+
Retailer 3
-
$50,225 AUD
$35,199 USD
View
B
Retailer 4
-
$55,772 AUD
$39,086 USD
View
B
Retailer 5
-
$56,278 AUD
£31,056 GBP
View
Most Expensive
B
The Diamond Guys
1965159174 · Nov 2
$59,904 AUD
$41,982 USD
View
5 more retailers have this diamond
Prices start from $44,007 AUDSave up to $15,897 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
$44,007 AUD