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Radiant|Natural|IGI

1.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • IGI 805628261

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

Certificate IGI 805628261

Diamond specifications and retailer prices

From £2,022 GBP
As of November 6, 2026
Save £2,186 GBP (52%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,208 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 805628261. Listed at 12 retailers as of November 5, 2026, with prices from £2,022 to £4,208, a £2,186 spread on the same certified stone. NZ Jewellers lists it at £4,208. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle30.1°
OriginNatural
Grading LabIGI
CertificateIGI 805628261
Dimensions7.88 × 5.52 × 3.83 mm
L/W Ratio1.43
Top View
7.88 mm5.52 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 805628261
Side View
Table 69.0%Crown 37.2°Girdle: STK-THKPavilion 30.1°CuletDepth 69.4%

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 6
Current: £4,208 GBP|Low: £2,022 GBP|High: £4,208 GBP|Avg: £2,779 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 3£2,022 GBP
Retailer 2£2,324 GBP
Retailer 4£2,343 GBP
Retailer 8£2,415 GBP
Retailer 10£2,508 GBP
Retailer 6£2,787 GBP
Retailer 5£2,943 GBP
Retailer 7£2,948 GBP
Retailer 9£4,028 GBP
NZ Jewellers£4,208 GBP

40 data points across 10 retailers

12 retailers£2,022 GBP to £4,208 GBP

A
Cheapest Retailer
-
£2,022 GBP
B+
Retailer 2
-
£2,324 GBP
View
B+
Retailer 3
-
£2,343 GBP
View
B+
Retailer 4
-
£2,409 GBP
View
B+
Retailer 5
-
£2,415 GBP
View
B+
Retailer 6
-
£2,508 GBP
View
B+
Retailer 7
-
£2,522 GBP
View
B+
Retailer 8
-
£2,787 GBP
View
B+
Retailer 9
-
£2,943 GBP
View
B+
Retailer 10
-
£2,948 GBP
View
B
Retailer 11
-
£4,028 GBP
View
Most Expensive
B
NZ Jewellers
d03f0501-cf4a-4061-9fb1-4c34e4e16201 · Nov 5
£4,208 GBP
$5,632 USD
View
11 more retailers have this diamond
Prices start from £2,022 GBPSave up to £2,186 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
£2,022 GBP