Oval|Natural|GIA

1.51ct F SI1 Oval Natural Diamond

EX • F/SI1 • GIA 6525635517

Certificate GIA 6525635517

Diamond specifications and retailer prices

From £4,893 GBP
HK$51,300 HKD
As of November 1, 2026
Save £4,291 GBP (47%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £11,021 GBP at NZ Jewellers · As of September 30, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6525635517. Listed at 19 retailers as of November 1, 2026, with a 88% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6525635517
Dimensions8.89 × 6.30 × 4.04 mm
L/W Ratio1.41
Top View
8.89 mm6.30 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6525635517
Side View
Table 62.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 64.1%

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 1
Current: £6,165 GBP|Low: £4,893 GBP|High: £9,295 GBP|Avg: £6,628 GBP|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 8£4,893 GBP
Retailer 2£5,627 GBP
Retailer 3£5,695 GBP
Retailer 11£6,051 GBP
Retailer 10£6,082 GBP
Retailer 5£6,092 GBP
Retailer 1£6,165 GBP
Retailer 9£6,242 GBP
Retailer 4£7,199 GBP
Retailer 7£8,096 GBP
Retailer 6£9,184 GBP

36 data points across 11 retailers

19 retailers£4,893 GBP to £9,184 GBP

A
Cheapest Retailer
-
£4,893 GBP
HK$51,300 HKD
Retailer 2
-
£5,581 GBP
SGD 10,121 SGD
View
Price last confirmed 21 days ago
B+
Retailer 3
-
£5,627 GBP
$7,551 USD
View
B+
Retailer 4
-
£5,695 GBP
$7,643 USD
View
B+
Retailer 5
-
£6,010 GBP
A$12,408 AUD
View
B+
Retailer 6
-
£6,051 GBP
$8,120 USD
View
B
Retailer 7
-
£6,082 GBP
$8,162 USD
View
Final sale: no returns
Retailer 8
-
£6,083 GBP
$8,163 USD
View
Price last confirmed 21 days ago
B+
Retailer 9
-
£6,092 GBP
View
B+
Retailer 10
-
£6,165 GBP
View
Retailer 11
-
£6,242 GBP
A$12,887 AUD
View
Price last confirmed 11 days ago
Retailer 12
-
£6,590 GBP
$8,843 USD
View
Price last confirmed 26 days ago
B+
Retailer 13
-
£6,599 GBP
$8,856 USD
View
Retailer 14
-
£6,691 GBP
$8,979 USD
View
Price last confirmed 34 days ago
B+
Retailer 15
-
£7,199 GBP
€9,201 EUR
View
Retailer 16
-
£7,603 GBP
$10,203 USD
View
Price last confirmed 24 days ago
B
Retailer 17
-
£8,096 GBP
ZAR 175,505 ZAR
View
B
Retailer 18
-
£9,184 GBP
View
Most Expensive
NZ Jewellers
e9163b27-0ca1-4f3a-9cca-51d1a823de61 · Sep 30
£11,021 GBP
$14,790 USD
View
Price last confirmed 33 days ago
18 more retailers have this diamond
Prices start from £4,893 GBPSave up to £4,291 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
£4,893 GBP