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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 £4,595 GBP
As of November 5, 2026
Save £2,477 GBP (35%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £7,072 GBP 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 £4,595 to £7,072, a £2,477 spread on the same certified stone. The Diamond Guys lists it at £7,072. 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
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £6,325 GBP|Low: £4,570 GBP|High: £8,316 GBP|Avg: £6,283 GBP|-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£4,595 GBP
Retailer 8£4,977 GBP
Retailer 4£5,265 GBP
Retailer 10£5,446 GBP
Retailer 9£5,472 GBP
Retailer 6£6,203 GBP
Retailer 7£6,252 GBP
Retailer 1£6,325 GBP
Retailer 5£6,421 GBP
Retailer 2£8,316 GBP

31 data points across 10 retailers

10 retailers£4,595 GBP to £7,072 GBP

A
Cheapest Retailer
-
£4,595 GBP
A
Retailer 2
-
£4,977 GBP
View
A
Retailer 3
-
£5,265 GBP
View
A
Retailer 4
-
£5,446 GBP
View
A
Retailer 5
-
£5,472 GBP
View
A
Retailer 6
-
£6,203 GBP
View
A
Retailer 7
-
£6,252 GBP
View
A
Retailer 8
-
£6,325 GBP
View
A
Retailer 9
-
£6,421 GBP
View
Most Expensive
B+
The Diamond Guys
1963437036 · Nov 6
£7,072 GBP
$9,466 USD
View
9 more retailers have this diamond
Prices start from £4,595 GBPSave up to £2,477 GBP

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
£4,595 GBP