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Radiant|Natural|IGI

1.00ct I SI1 Radiant Natural Diamond

VG • I/SI1 • IGI 668406118

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

Certificate IGI 668406118

Diamond specifications and retailer prices

From £852 GBP
$1,141 USD
As of October 31, 2026
Save £1,399 GBP (62%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,251 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct natural radiant diamond

This 1ct natural radiant sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 668406118. Listed at 17 retailers as of October 30, 2026, with prices from £852 to £2,251, a £1,399 spread on the same certified stone. NZ Jewellers lists it at £2,251. 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

1.00
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle47.7°
Pavilion angle39°
OriginNatural
Grading LabIGI
CertificateIGI 668406118
Dimensions7.36 × 4.71 × 3.31 mm
L/W Ratio1.56
Culet sizePointed
Top View
7.36 mm4.71 mm1.00 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 668406118
Side View
Table 62.0%Crown 47.7°Girdle: MediumPavilion 39°Culet: NoneDepth 70.3%

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: Oct 31
Current: £2,251 GBP|Low: £781 GBP|High: £2,254 GBP|Avg: £1,117 GBP|-0.1%
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
Retailer 15
Retailer 16
Retailer 17
November 1, 2026
Retailer 17£852 GBP
Retailer 15£881 GBP
Retailer 3£884 GBP
Retailer 16£884 GBP
Retailer 4£911 GBP
Retailer 2£923 GBP
Retailer 7£923 GBP
Retailer 5£958 GBP
Retailer 6£960 GBP
Retailer 8£964 GBP
Retailer 9£1,023 GBP
Retailer 12£1,065 GBP
Retailer 11£1,071 GBP
Retailer 14£1,127 GBP
Retailer 13£1,290 GBP
Retailer 10£1,691 GBP
NZ Jewellers£2,251 GBP

44 data points across 17 retailers

17 retailers£852 GBP to £2,251 GBP

A
Cheapest Retailer
-
£852 GBP
$1,141 USD
Final sale: no returns
A
Retailer 2
-
£881 GBP
$1,180 USD
View
A
Retailer 3
-
£884 GBP
$1,184 USD
View
A
Retailer 4
-
£884 GBP
$1,185 USD
View
Retailer 5
-
£911 GBP
View
Price last confirmed 32 days ago
A
Retailer 6
-
£923 GBP
$1,237 USD
View
A
Retailer 7
-
£923 GBP
$1,237 USD
View
B+
Retailer 8
-
£958 GBP
$1,284 USD
View
B+
Retailer 9
-
£960 GBP
$1,286 USD
View
B+
Retailer 10
-
£964 GBP
$1,292 USD
View
B+
Retailer 11
-
£1,023 GBP
$1,371 USD
View
B+
Retailer 12
-
£1,065 GBP
$1,427 USD
View
B+
Retailer 13
-
£1,071 GBP
View
A
Retailer 14
-
£1,127 GBP
ZAR 24,386 ZAR
View
B+
Retailer 15
-
£1,290 GBP
€1,646 EUR
View
B+
Retailer 16
-
£1,691 GBP
View
Most Expensive
B
NZ Jewellers
0d51d9f8-e1d2-4c0d-a64e-38ef3143801b · Oct 30
£2,251 GBP
$3,016 USD
View
16 more retailers have this diamond
Prices start from £852 GBPSave up to £1,399 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
1.00ct Radiant
£852 GBP