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Round|Natural|IGI

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • IGI 762582313

Shape and cutting style on the report: Round brilliant

Certificate IGI 762582313

Diamond specifications and retailer prices

From £1,568 GBP
As of November 5, 2026
Save £1,466 GBP (48%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,251 GBP at NZ Jewellers · As of September 26, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 762582313. Listed at 13 retailers as of November 4, 2026, with a 93% 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.4°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 762582313
Dimensions7.26 × 7.30 × 4.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.26 mm7.30 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 762582313
Side View
Table 58.0%Crown 36.4°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 63.0%

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: £2,292 GBP|Low: £1,568 GBP|High: £3,605 GBP|Avg: £2,320 GBP|-16.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£1,568 GBP
Retailer 5£1,827 GBP
Retailer 6£1,840 GBP
Retailer 8£1,895 GBP
Retailer 2£1,990 GBP
Retailer 3£2,017 GBP
Retailer 1£2,292 GBP
Retailer 9£2,349 GBP
Retailer 4£3,034 GBP

27 data points across 9 retailers

13 retailers£1,568 GBP to £3,034 GBP

A
Cheapest Retailer
-
£1,568 GBP
A
Retailer 2
-
£1,827 GBP
View
A
Retailer 3
-
£1,840 GBP
View
Retailer 4
-
£1,895 GBP
View
Price last confirmed 8 days ago
A
Retailer 5
-
£1,990 GBP
View
A
Retailer 6
-
£2,017 GBP
View
Retailer 7
-
£2,034 GBP
View
Price last confirmed 29 days ago
Retailer 8
-
£2,034 GBP
View
Price last confirmed 25 days ago
Retailer 9
-
£2,112 GBP
View
Price last confirmed 38 days ago
A
Retailer 10
-
£2,292 GBP
View
Retailer 11
-
£2,346 GBP
View
Price last confirmed 28 days ago
B+
Retailer 12
-
£3,034 GBP
View
Most Expensive
NZ Jewellers
b342702d-3fa6-4042-a6e4-f596b5ad42a7 · Sep 26
£4,251 GBP
$5,721 USD
View
Price last confirmed 40 days ago
12 more retailers have this diamond
Prices start from £1,568 GBPSave up to £1,466 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
£1,568 GBP