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Radiant|Lab Grown|IGI

1.00ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG474116507

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

Certificate IGI LG474116507

Diamond specifications and retailer prices

From £506 GBP
As of November 6, 2026
Save £450 GBP (47%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,863 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1ct lab-grown radiant diamond

This 1ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG474116507 or 474116507. Listed at 13 retailers as of November 6, 2026, with a 89% 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

1.00
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.1°
Pavilion angle31.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG474116507
Dimensions6.01 × 4.95 × 3.57 mm
L/W Ratio1.21
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.01 mm4.95 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG474116507
Side View
Table 67.0%Crown 41.1°Girdle: ThickPavilion 31.5°Culet: NoneDepth 72.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £929 GBP|Low: £370 GBP|High: £2,504 GBP|Avg: £933 GBP|-0.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 4£370 GBP
Retailer 8£506 GBP
Retailer 2£551 GBP
Retailer 3£566 GBP
Retailer 10£586 GBP
Retailer 9£672 GBP
Retailer 6£721 GBP
Retailer 1£929 GBP
Retailer 12£956 GBP
Retailer 7£1,499 GBP
Retailer 11£1,650 GBP
Retailer 5£2,465 GBP

43 data points across 12 retailers

13 retailers£506 GBP to £956 GBP

B+
Cheapest Retailer
-
£506 GBP
B
Retailer 2
-
£551 GBP
View
B
Retailer 3
-
£566 GBP
View
Final sale: no returns
Retailer 4
-
£586 GBP
View
Price last confirmed 22 days ago
B
Retailer 5
-
£586 GBP
View
B
Retailer 6
-
£672 GBP
View
B
Retailer 7
-
£721 GBP
View
B
Retailer 8
-
£929 GBP
View
B
Retailer 9
-
£956 GBP
View
Retailer 10
-
£1,499 GBP
View
Price under review
Retailer 11
-
£1,650 GBP
View
Price under review
Most Expensive
Reve Diamonds
4428E9DB7 · Nov 6
£1,863 GBP
$2,494 USD
View
Price under review
11 more retailers have this diamond
Prices start from £506 GBPSave up to £450 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.

B+
1.00ct Radiant
£506 GBP