CaratHunter
Plans
Oval|Natural|GIA

1.51ct F SI2 Oval Natural Diamond

EX • F/SI2 • GIA 6455128223

Certificate GIA 6455128223

Diamond specifications and retailer prices

From £4,178 GBP
HK$43,800 HKD
As of November 1, 2026
Save £5,406 GBP (56%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £9,584 GBP at NZ Jewellers · As of October 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6455128223. Listed at 17 retailers as of October 30, 2026, with prices from £4,178 to £9,584, a £5,406 spread on the same certified stone. NZ Jewellers lists it at £9,584. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6455128223
Dimensions8.76 × 6.24 × 4.03 mm
L/W Ratio1.40
Top View
8.76 mm6.24 mm1.51 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6455128223
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 64.5%

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: £4,178 GBP|Low: £4,007 GBP|High: £8,082 GBP|Avg: £5,570 GBP|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6£4,178 GBP
Retailer 1£4,178 GBP
Retailer 5£4,780 GBP
Retailer 7£4,900 GBP
Retailer 8£5,289 GBP
Retailer 3£5,402 GBP
Retailer 9£5,818 GBP
Retailer 2£6,260 GBP
Retailer 4£7,986 GBP

36 data points across 9 retailers

17 retailers£4,178 GBP to £9,584 GBP

A
Cheapest Retailer
-
£4,178 GBP
HK$43,800 HKD
A
Retailer 2
-
£4,178 GBP
₹533,985 INR
View
Retailer 3
-
£4,769 GBP
SGD 8,648 SGD
View
Price last confirmed 18 days ago
A
Retailer 4
-
£4,780 GBP
$6,414 USD
View
B+
Retailer 5
-
£4,893 GBP
$6,566 USD
View
B+
Retailer 6
-
£4,900 GBP
$6,575 USD
View
B+
Retailer 7
-
£5,289 GBP
$7,097 USD
View
Final sale: no returns
B+
Retailer 8
-
£5,289 GBP
$7,098 USD
View
B+
Retailer 9
-
£5,402 GBP
View
B+
Retailer 10
-
£5,730 GBP
$7,689 USD
View
B+
Retailer 11
-
£5,818 GBP
$7,808 USD
View
B+
Retailer 12
-
£5,852 GBP
$7,853 USD
View
B+
Retailer 13
-
£6,260 GBP
€8,000 EUR
View
B+
Retailer 14
-
£6,611 GBP
$8,872 USD
View
B
Retailer 15
-
£7,986 GBP
View
B
Retailer 16
-
£8,863 GBP
$11,894 USD
View
Most Expensive
B
NZ Jewellers
e2e0bffa-2620-4c99-98d0-a40ac2736498 · Oct 30
£9,584 GBP
$12,861 USD
View
16 more retailers have this diamond
Prices start from £4,178 GBPSave up to £5,406 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
£4,178 GBP