Marquise|Natural|GIA

2.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 1553744455

Certificate GIA 1553744455

Diamond specifications and retailer prices

From $29,711 AUD
$20,870 USD
As of October 26, 2026
Save $20,831 AUD (41%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $50,542 AUD at MOH London · As of October 26, 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1553744455. Listed at 25 retailers as of October 26, 2026, with prices from $29,711 to $50,542, a $20,831 spread on the same certified stone. MOH London lists it at $50,542. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.16°
Pavilion angle39.4°
OriginNatural
Grading LabGIA
CertificateGIA 1553744455
Dimensions12.40 × 6.80 × 4.60 mm
L/W Ratio1.82
Culet sizeNone
Top View
12.40 mm6.80 mm2.51 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553744455
Side View
Table 58.0%Crown 43.16°Girdle: STK-VTKPavilion 39.4°Culet: NoneDepth 67.8%

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: Oct 26
Current: $50,542 AUD|Low: $25,995 AUD|High: $51,082 AUD|Avg: $33,841 AUD|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9$29,711 AUD
Retailer 8$30,190 AUD
Retailer 2$30,562 AUD
Retailer 7$30,972 AUD
Retailer 5$31,194 AUD
Retailer 3$32,640 AUD
Retailer 4$37,643 AUD
Retailer 6$38,889 AUD
MOH London$50,542 AUD

45 data points across 9 retailers

25 retailers$29,711 AUD to $50,542 AUD

B+
Cheapest Retailer
-
$29,711 AUD
$20,870 USD
Retailer 2
-
$29,947 AUD
$21,036 USD
View
Price last confirmed 9 days ago
Retailer 3
-
$30,190 AUD
$21,207 USD
View
Price last confirmed 7 days ago
B+
Retailer 4
-
$30,562 AUD
₹2,044,612 INR
View
B+
Retailer 5
-
$30,629 AUD
View
B+
Retailer 6
-
$31,194 AUD
$21,912 USD
View
Retailer 7
-
$32,319 AUD
$22,702 USD
View
Price last confirmed 25 days ago
B+
Retailer 8
-
$32,640 AUD
£18,054 GBP
View
B+
Retailer 9
-
$32,774 AUD
$23,022 USD
View
Retailer 10
-
$33,934 AUD
$23,837 USD
View
Price last confirmed 32 days ago
Retailer 11
-
$34,539 AUD
$24,262 USD
View
Price last confirmed 8 days ago
B+
Retailer 12
-
$34,707 AUD
$24,380 USD
View
B+
Retailer 13
-
$34,707 AUD
$24,380 USD
View
Retailer 14
-
$35,012 AUD
$24,594 USD
View
Price last confirmed 25 days ago
Retailer 15
-
$35,012 AUD
$24,594 USD
View
Price last confirmed 38 days ago
B+
Retailer 16
-
$35,392 AUD
View
B
Retailer 17
-
$35,860 AUD
$25,190 USD
View
Retailer 18
-
$36,359 AUD
$25,540 USD
View
Price last confirmed 56 days ago
Retailer 19
-
$36,359 AUD
$25,540 USD
View
Price last confirmed 34 days ago
Retailer 20
-
$36,844 AUD
$25,881 USD
View
Price last confirmed 10 days ago
B
Retailer 21
-
$37,643 AUD
€25,183 EUR
View
Retailer 22
-
$38,889 AUD
$27,317 USD
View
Price last confirmed 9 days ago
Retailer 23
-
$45,784 AUD
$32,161 USD
View
Price last confirmed 38 days ago
Retailer 24
-
$45,784 AUD
$32,161 USD
View
Price last confirmed 33 days ago
Most Expensive
B
MOH London
3DD4EB45D · Oct 26
$50,542 AUD
£27,955 GBP
View
24 more retailers have this diamond
Prices start from $29,711 AUDSave up to $20,831 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
$29,711 AUD