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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 $11,770 USD
As of November 4, 2026
Save $7,990 USD (40%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $19,760 USD 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 $11,770 to $19,760, a $7,990 spread on the same certified stone. MOH London lists it at $19,760. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $19,760 USD|Low: $9,043 USD|High: $20,051 USD|Avg: $13,399 USD|-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$9,043 USD
Retailer 3$9,190 USD
Retailer 4$10,079 USD
Retailer 12$11,770 USD
Retailer 11$12,792 USD
Retailer 6$13,406 USD
Retailer 13$13,541 USD
Retailer 9$14,655 USD
Retailer 2$14,917 USD
Retailer 8$15,320 USD
Retailer 10$15,740 USD
Retailer 7$15,979 USD
MOH London$19,760 USD

33 data points across 13 retailers

19 retailers$11,770 USD to $19,760 USD

Retailer 1
-
$9,190 USD
Price last confirmed 56 days ago
B+
Retailer 2
-
$11,770 USD
View
Retailer 3
-
$12,686 USD
View
Price last confirmed 29 days ago
B+
Retailer 4
-
$12,792 USD
View
B+
Retailer 5
-
$13,406 USD
View
Retailer 6
-
$13,532 USD
View
Price last confirmed 38 days ago
B+
Retailer 7
-
$13,541 USD
View
Retailer 8
-
$13,743 USD
View
Price last confirmed 29 days ago
Retailer 9
-
$13,743 USD
View
Price last confirmed 43 days ago
Retailer 10
-
$14,272 USD
View
Price last confirmed 38 days ago
Retailer 11
-
$14,272 USD
View
Price last confirmed 43 days ago
B+
Retailer 12
-
$14,655 USD
View
B+
Retailer 13
-
$14,917 USD
View
B
Retailer 14
-
$15,320 USD
View
B
Retailer 15
-
$15,740 USD
View
B
Retailer 16
-
$15,979 USD
View
Retailer 17
-
$17,972 USD
View
Price last confirmed 42 days ago
Retailer 18
-
$17,972 USD
View
Price last confirmed 38 days ago
Most Expensive
B
MOH London
DB46F1EEE · Nov 4
$19,760 USD
£15,559 GBP
View
18 more retailers have this diamond
Prices start from $11,770 USDSave up to $7,990 USD

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
$11,770 USD