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Radiant|Natural|IGI

1.51ct K SI2 Radiant Natural Diamond

VG • K/SI2 • IGI 660411129

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI 660411129

Diamond specifications and retailer prices

From £1,295 GBP
As of November 4, 2026
Save £2,172 GBP (63%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,467 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 660411129. Listed at 13 retailers as of November 4, 2026, with prices from £1,295 to £3,467, a £2,172 spread on the same certified stone. NZ Jewellers lists it at £3,467. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle45.8°
Pavilion angle31.6°
OriginNatural
Grading LabIGI
CertificateIGI 660411129
Dimensions7.20 × 5.77 × 3.99 mm
L/W Ratio1.25
Culet sizePointed
Top View
7.20 mm5.77 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 660411129
Side View
Table 66.0%Crown 45.8°Girdle: MED-STKPavilion 31.6°Culet: NoneDepth 69.2%

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 4
Current: £3,467 GBP|Low: £1,295 GBP|High: £3,467 GBP|Avg: £1,735 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 10£1,295 GBP
Retailer 12£1,388 GBP
Retailer 2£1,416 GBP
Retailer 8£1,421 GBP
Retailer 13£1,421 GBP
Retailer 3£1,422 GBP
Retailer 9£1,487 GBP
Retailer 11£1,491 GBP
Retailer 4£1,523 GBP
Retailer 14£1,640 GBP
Retailer 5£1,691 GBP
Retailer 6£1,942 GBP
Retailer 7£2,489 GBP
NZ Jewellers£3,467 GBP

38 data points across 14 retailers

13 retailers£1,295 GBP to £3,467 GBP

A
Cheapest Retailer
-
£1,295 GBP
B+
Retailer 2
-
£1,388 GBP
View
A
Retailer 3
-
£1,416 GBP
View
B+
Retailer 4
-
£1,421 GBP
View
Retailer 5
-
£1,421 GBP
View
Price last confirmed 9 days ago
B+
Retailer 6
-
£1,422 GBP
View
B+
Retailer 7
-
£1,487 GBP
View
B+
Retailer 8
-
£1,491 GBP
View
B+
Retailer 9
-
£1,523 GBP
View
Retailer 10
-
£1,640 GBP
View
Price last confirmed 61 days ago
B+
Retailer 11
-
£1,640 GBP
View
B+
Retailer 12
-
£2,489 GBP
View
Most Expensive
B
NZ Jewellers
befa1d0d-51a9-4245-bdd3-d044f374e15d · Nov 5
£3,467 GBP
$4,640 USD
View
12 more retailers have this diamond
Prices start from £1,295 GBPSave up to £2,172 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 Radiant
£1,295 GBP