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Marquise|Natural|GIA

2.51ct D SI2 Marquise Natural Diamond

GD • D/SI2 • GIA 1555957217

Certificate GIA 1555957217

Diamond specifications and retailer prices

From $45,798 AUD
$32,096 USD
As of November 1, 2026
Save $32,765 AUD (42%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $78,563 AUD at MOH London · As of November 1, 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 D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1555957217. Listed at 19 retailers as of November 1, 2026, with prices from $45,798 to $78,563, a $32,765 spread on the same certified stone. MOH London lists it at $78,563. 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
D
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555957217
Dimensions15.46 × 6.77 × 4.23 mm
L/W Ratio2.28
Culet sizeNone
Key to symbols
Crystal, Feather, Needle, Etch Channel, Indented Natural
Top View
15.46 mm6.77 mm2.51 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555957217
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $78,563 AUD|Low: $40,578 AUD|High: $79,509 AUD|Avg: $53,139 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 10$45,798 AUD
Retailer 9$46,110 AUD
Retailer 5$47,690 AUD
Retailer 7$48,694 AUD
Retailer 6$50,304 AUD
Retailer 4$50,678 AUD
Retailer 8$51,038 AUD
Retailer 2$56,278 AUD
Retailer 3$59,004 AUD
MOH London$78,563 AUD

44 data points across 10 retailers

19 retailers$45,798 AUD to $78,563 AUD

B+
Cheapest Retailer
-
$45,798 AUD
$32,096 USD
B+
Retailer 2
-
$46,110 AUD
$32,315 USD
View
Final sale: no returns
B+
Retailer 3
-
$46,747 AUD
$32,761 USD
View
Retailer 4
-
$46,936 AUD
$32,894 USD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
$47,106 AUD
$33,013 USD
View
B+
Retailer 6
-
$47,690 AUD
₹3,183,059 INR
View
B+
Retailer 7
-
$48,694 AUD
$34,126 USD
View
B+
Retailer 8
-
$50,304 AUD
$35,254 USD
View
Retailer 9
-
$50,304 AUD
$35,254 USD
View
Price last confirmed 21 days ago
B+
Retailer 10
-
$50,678 AUD
£27,965 GBP
View
B+
Retailer 11
-
$51,038 AUD
$35,768 USD
View
Retailer 12
-
$52,399 AUD
$36,722 USD
View
Price last confirmed 34 days ago
Retailer 13
-
$52,818 AUD
$37,016 USD
View
Price last confirmed 32 days ago
B
Retailer 14
-
$53,790 AUD
$37,697 USD
View
Retailer 15
-
$54,495 AUD
$38,191 USD
View
Price last confirmed 25 days ago
B
Retailer 16
-
$56,278 AUD
£31,056 GBP
View
Retailer 17
-
$56,591 AUD
$39,660 USD
View
Price last confirmed 24 days ago
B
Retailer 18
-
$59,004 AUD
€39,382 EUR
View
Most Expensive
B
MOH London
585ECAC27 · Nov 1
$78,563 AUD
£43,353 GBP
View
18 more retailers have this diamond
Prices start from $45,798 AUDSave up to $32,765 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.

B+
2.51ct Marquise
$45,798 AUD