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Oval|Natural|GIA

2.51ct K SI2 Oval Natural Diamond

ID • K/SI2 • GIA 2554859851

Certificate GIA 2554859851

Diamond specifications and retailer prices

From $17,130 AUD
As of November 4, 2026
Save $11,629 AUD (40%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $28,759 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 2.51ct natural oval diamond

This 2.51ct natural oval sits in the two to three carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2554859851. Listed at 19 retailers as of November 4, 2026, with prices from $17,130 to $28,759, a $11,629 spread on the same certified stone. MOH London lists it at $28,759. 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
K
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554859851
Dimensions10.66 × 7.43 × 4.67 mm
L/W Ratio1.43
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Cloud, Crystal, Needle, Indented Natural
Top View
10.66 mm7.43 mm2.51 ctK / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554859851
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 62.9%

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 4
Current: $28,759 AUD|Low: $13,161 AUD|High: $29,182 AUD|Avg: $19,500 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 5$13,161 AUD
Retailer 3$13,375 AUD
Retailer 4$14,669 AUD
Retailer 12$17,130 AUD
Retailer 11$18,617 AUD
Retailer 6$19,511 AUD
Retailer 13$19,708 AUD
Retailer 9$21,329 AUD
Retailer 2$21,710 AUD
Retailer 8$22,297 AUD
Retailer 10$22,908 AUD
Retailer 7$23,256 AUD
MOH London$28,759 AUD

33 data points across 13 retailers

19 retailers$17,130 AUD to $28,759 AUD

Retailer 1
-
$13,375 AUD
Price last confirmed 56 days ago
B+
Retailer 2
-
$17,130 AUD
View
Retailer 3
-
$18,463 AUD
View
Price last confirmed 29 days ago
B+
Retailer 4
-
$18,617 AUD
View
B+
Retailer 5
-
$19,511 AUD
View
Retailer 6
-
$19,694 AUD
View
Price last confirmed 38 days ago
B+
Retailer 7
-
$19,708 AUD
View
Retailer 8
-
$20,002 AUD
View
Price last confirmed 29 days ago
Retailer 9
-
$20,002 AUD
View
Price last confirmed 43 days ago
Retailer 10
-
$20,771 AUD
View
Price last confirmed 38 days ago
Retailer 11
-
$20,771 AUD
View
Price last confirmed 43 days ago
B+
Retailer 12
-
$21,329 AUD
View
B+
Retailer 13
-
$21,710 AUD
View
B
Retailer 14
-
$22,297 AUD
View
B
Retailer 15
-
$22,908 AUD
View
B
Retailer 16
-
$23,256 AUD
View
Retailer 17
-
$26,156 AUD
View
Price last confirmed 42 days ago
Retailer 18
-
$26,156 AUD
View
Price last confirmed 38 days ago
Most Expensive
B
MOH London
DB46F1EEE · Nov 4
$28,759 AUD
£15,559 GBP
View
18 more retailers have this diamond
Prices start from $17,130 AUDSave up to $11,629 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 Oval
$17,130 AUD