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Round|Natural|IGI

1.51ct F I1 Round Natural Diamond

EX • F/I1 • IGI 647430353

Shape and cutting style on the report: Round brilliant

Certificate IGI 647430353

Diamond specifications and retailer prices

From £2,023 GBP
$2,715 USD
As of November 1, 2026
Save £611 GBP (23%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,937 GBP at NZ Jewellers · As of October 23, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded F colour (colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI 647430353. Listed at 7 retailers as of November 1, 2026, with a 30% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
F
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.4°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 647430353
Dimensions7.30 × 7.33 × 4.59 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
7.30 mm7.33 mm1.51 ctF / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 647430353
Side View
Table 58.0%Crown 34.4°Girdle: MediumPavilion 41.7°Culet: NoneDepth 62.8%

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: £3,937 GBP|Low: £2,023 GBP|High: £3,937 GBP|Avg: £2,668 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 3£2,023 GBP
Retailer 10£2,085 GBP
Retailer 6£2,259 GBP
Retailer 7£2,259 GBP
Retailer 4£2,347 GBP
Retailer 5£2,607 GBP
Retailer 2£2,635 GBP
Retailer 8£2,689 GBP
Retailer 9£3,650 GBP
NZ Jewellers£3,937 GBP

20 data points across 10 retailers

7 retailers£2,023 GBP to £2,635 GBP

A
Cheapest Retailer
-
£2,023 GBP
$2,715 USD
Retailer 2
-
£2,259 GBP
$3,032 USD
View
Price last confirmed 9 days ago
Retailer 3
-
£2,259 GBP
$3,032 USD
View
Price last confirmed 8 days ago
Retailer 4
-
£2,347 GBP
$3,149 USD
View
Price last confirmed 9 days ago
Retailer 5
-
£2,607 GBP
$3,499 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
£2,635 GBP
€3,367 EUR
View
Most Expensive
NZ Jewellers
f652f98f-45d1-4540-8311-1d6516cf5afc · Oct 23
£3,937 GBP
$5,283 USD
View
Price last confirmed 10 days ago
6 more retailers have this diamond
Prices start from £2,023 GBPSave up to £611 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 Round
£2,023 GBP