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Radiant|Lab Grown|IGI

1.00ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG677580013

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

Certificate IGI LG677580013

Diamond specifications and retailer prices

From £151 GBP
As of November 6, 2026
Save £453 GBP (75%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £876 GBP at MOH London · As of October 25, 2026
View at MOH London

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 LG677580013 or 677580013. Listed at 15 retailers as of November 4, 2026, with a 300% 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 angle37.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677580013
Dimensions6.88 × 4.92 × 3.27 mm
L/W Ratio1.40
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.88 mm4.92 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677580013
Side View
Table 66.0%Crown 37.4°Girdle: STK-THKPavilionCulet: NoneDepth 66.5%

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 6
Current: £876 GBP|Low: £145 GBP|High: £885 GBP|Avg: £345 GBP|+4.1%
MOH London
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 9£151 GBP
Retailer 4£169 GBP
Retailer 14£175 GBP
Retailer 3£187 GBP
Retailer 11£187 GBP
Retailer 5£229 GBP
Retailer 2£241 GBP
Retailer 13£325 GBP
Retailer 7£340 GBP
Retailer 6£363 GBP
Retailer 10£433 GBP
Retailer 12£601 GBP
Retailer 8£604 GBP
MOH London£876 GBP

45 data points across 14 retailers

15 retailers£151 GBP to £604 GBP

A
Cheapest Retailer
-
£151 GBP
A
Retailer 2
-
£169 GBP
View
Final sale: no returns
A
Retailer 3
-
£175 GBP
View
A
Retailer 4
-
£187 GBP
View
Retailer 5
-
£187 GBP
View
Price last confirmed 13 days ago
A
Retailer 6
-
£229 GBP
View
A
Retailer 7
-
£241 GBP
View
B+
Retailer 8
-
£325 GBP
View
B+
Retailer 9
-
£340 GBP
View
B+
Retailer 10
-
£363 GBP
View
B+
Retailer 11
-
£373 GBP
View
B+
Retailer 12
-
£433 GBP
View
B
Retailer 13
-
£601 GBP
View
B
Retailer 14
-
£604 GBP
View
Most Expensive
MOH London
LG677580013 · Oct 25
£876 GBP
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from £151 GBPSave up to £453 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
£151 GBP