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Oval|Natural|GIA

2.51ct K SI2 Oval Natural Diamond

EX • K/SI2 • GIA 6551518379

Certificate GIA 6551518379

Diamond specifications and retailer prices

From $6,151 USD
As of November 5, 2026
Save $3,315 USD (35%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $9,466 USD at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

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 6551518379. Listed at 10 retailers as of November 5, 2026, with prices from $6,151 to $9,466, a $3,315 spread on the same certified stone. The Diamond Guys lists it at $9,466. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.54°
Pavilion angle39.08°
OriginNatural
Grading LabGIA
CertificateGIA 6551518379
Dimensions10.67 × 7.64 × 4.76 mm
L/W Ratio1.40
Culet sizeNone
Top View
10.67 mm7.64 mm2.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551518379
Side View
Table 60.0%Crown 39.54°Girdle: MED-THKPavilion 39.08°Culet: NoneDepth 62.4%

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 5
Current: $8,466 USD|Low: $6,117 USD|High: $11,131 USD|Avg: $8,410 USD|-9.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 3$6,151 USD
Retailer 8$6,662 USD
Retailer 4$7,047 USD
Retailer 10$7,290 USD
Retailer 9$7,324 USD
Retailer 6$8,302 USD
Retailer 7$8,368 USD
Retailer 1$8,466 USD
Retailer 5$8,594 USD
Retailer 2$11,131 USD

31 data points across 10 retailers

10 retailers$6,151 USD to $9,466 USD

A
Cheapest Retailer
-
$6,151 USD
A
Retailer 2
-
$6,662 USD
View
A
Retailer 3
-
$7,047 USD
View
A
Retailer 4
-
$7,290 USD
View
A
Retailer 5
-
$7,324 USD
View
A
Retailer 6
-
$8,302 USD
View
A
Retailer 7
-
$8,368 USD
View
A
Retailer 8
-
$8,466 USD
View
A
Retailer 9
-
$8,594 USD
View
Most Expensive
B+
The Diamond Guys
1963437036 · Nov 6
$9,466 USD
View
9 more retailers have this diamond
Prices start from $6,151 USDSave up to $3,315 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.

A
2.51ct Oval
$6,151 USD