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Oval|Natural|GIA

1.51ct F SI2 Oval Natural Diamond

ID • F/SI2 • GIA 5231766500

Certificate GIA 5231766500

Diamond specifications and retailer prices

From £4,063 GBP
As of November 2, 2026
Save £3,150 GBP (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £7,213 GBP at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5231766500. Listed at 6 retailers as of November 2, 2026, with prices from £4,063 to £7,213, a £3,150 spread on the same certified stone. NZ Jewellers lists it at £7,213. 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

1.51
Carat
F
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle39.2°
Pavilion angle40.61°
OriginNatural
Grading LabGIA
CertificateGIA 5231766500
Dimensions8.75 × 6.31 × 4.14 mm
L/W Ratio1.39
Top View
8.75 mm6.31 mm1.51 ctF / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5231766500
Side View
Table 58.0%Crown 39.2°Girdle: MediumPavilion 40.61°Culet: NoneDepth 65.7%

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 2
Current: £7,213 GBP|Low: £4,063 GBP|High: £7,286 GBP|Avg: £5,029 GBP|-1.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 2£4,063 GBP
Retailer 4£4,312 GBP
Retailer 5£4,312 GBP
Retailer 6£4,395 GBP
Retailer 8£4,467 GBP
Retailer 7£4,607 GBP
Retailer 9£4,900 GBP
Retailer 3£6,353 GBP
NZ Jewellers£7,213 GBP

31 data points across 9 retailers

6 retailers£4,063 GBP to £7,213 GBP

A
Cheapest Retailer
-
£4,063 GBP
A
Retailer 2
-
£4,312 GBP
View
A
Retailer 3
-
£4,312 GBP
View
A
Retailer 4
-
£4,395 GBP
View
B+
Retailer 5
-
£6,353 GBP
View
Most Expensive
B
NZ Jewellers
7e187fd1-d5e8-4b79-829f-44795d5646fe · Nov 2
£7,213 GBP
$9,654 USD
View
5 more retailers have this diamond
Prices start from £4,063 GBPSave up to £3,150 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
1.51ct Oval
£4,063 GBP