Oval|Natural|GIA

0.51ct F SI1 Oval Natural Diamond

EX • F/SI1 • GIA 1553375957

Certificate GIA 1553375957

Diamond specifications and retailer prices

From £399 GBP
As of November 5, 2026
Save £353 GBP (47%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £752 GBP at Frank Darling · As of November 6, 2026
View at Frank Darling

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553375957. Listed at 11 retailers as of November 5, 2026, with prices from £399 to £752, a £353 spread on the same certified stone. Frank Darling lists it at £752. 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

0.51
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.5°
Pavilion angle37.75°
OriginNatural
Grading LabGIA
CertificateGIA 1553375957
Dimensions6.82 × 4.35 × 2.62 mm
L/W Ratio1.57
Culet sizeNone
Top View
6.82 mm4.35 mm0.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1553375957
Side View
Table 60.0%Crown 38.5°Girdle: THN-VTKPavilion 37.75°Culet: NoneDepth 60.1%

Caratlytics Score

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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: £752 GBP|Low: £397 GBP|High: £787 GBP|Avg: £581 GBP|-4.5%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 4£399 GBP
Retailer 10£434 GBP
Retailer 8£468 GBP
Retailer 3£504 GBP
Retailer 5£565 GBP
Retailer 7£608 GBP
Retailer 6£610 GBP
Retailer 2£637 GBP
Retailer 9£655 GBP
Frank Darling£752 GBP

32 data points across 10 retailers

11 retailers£399 GBP to £752 GBP

A
Cheapest Retailer
-
£399 GBP
A
Retailer 2
-
£434 GBP
View
A
Retailer 3
-
£468 GBP
View
A
Retailer 4
-
£504 GBP
View
B+
Retailer 5
-
£561 GBP
View
B+
Retailer 6
-
£565 GBP
View
B+
Retailer 7
-
£608 GBP
View
B+
Retailer 8
-
£610 GBP
View
B+
Retailer 9
-
£637 GBP
View
B+
Retailer 10
-
£655 GBP
View
Most Expensive
B+
Frank Darling
2649521HK · Nov 6
£752 GBP
$1,007 USD
View
10 more retailers have this diamond
Prices start from £399 GBPSave up to £353 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
0.51ct Oval
£399 GBP