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Radiant|Lab Grown|IGI

1.05ct E SI1 Radiant Lab Grown Diamond

VG • E/SI1 • IGI LG644487427

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

Certificate IGI LG644487427

Diamond specifications and retailer prices

From £118 GBP
$157 USD
As of October 25, 2026
Save £870 GBP (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £988 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.05ct lab-grown radiant diamond

This 1.05ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG644487427 or 644487427. Listed at 15 retailers as of October 25, 2026, with prices from £118 to £988, a £870 spread on the same certified stone. MOH London lists it at £988. 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

1.05
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.1°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG644487427
Dimensions7.40 × 4.89 × 3.34 mm
L/W Ratio1.51
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.40 mm4.89 mm1.05 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG644487427
Side View
Table 65.0%Crown 45.1°Girdle: MED-STKPavilion 34.6°Culet: NoneDepth 68.3%

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: Oct 25
Current: £988 GBP|Low: £110 GBP|High: £995 GBP|Avg: £299 GBP|+0.5%
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
October 30, 2026
Retailer 3£110 GBP
Retailer 4£116 GBP
Retailer 8£118 GBP
Retailer 12£153 GBP
Retailer 2£196 GBP
Retailer 7£224 GBP
Retailer 13£225 GBP
Retailer 6£227 GBP
Retailer 11£231 GBP
Retailer 10£349 GBP
Retailer 5£361 GBP
Retailer 9£399 GBP
Retailer 14£443 GBP
MOH London£988 GBP

36 data points across 14 retailers

15 retailers£118 GBP to £988 GBP

Retailer 1
-
£110 GBP
$147 USD
Price last confirmed 32 days ago
Retailer 2
-
£116 GBP
$155 USD
View
Price last confirmed 32 days ago
A
Retailer 3
-
£118 GBP
$157 USD
View
Retailer 4
-
£153 GBP
View
Price last confirmed 13 days ago
A
Retailer 5
-
£196 GBP
View
A
Retailer 6
-
£224 GBP
View
B+
Retailer 7
-
£225 GBP
$299 USD
View
B+
Retailer 8
-
£227 GBP
$302 USD
View
B+
Retailer 9
-
£231 GBP
€293 EUR
View
Retailer 10
-
£349 GBP
$465 USD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
£361 GBP
$481 USD
View
B
Retailer 12
-
£399 GBP
$532 USD
View
B+
Retailer 13
-
£431 GBP
View
B
Retailer 14
-
£443 GBP
$590 USD
View
Most Expensive
B
MOH London
LG644487427 · Oct 29
£988 GBP
View
14 more retailers have this diamond
Prices start from £118 GBPSave up to £870 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
1.05ct Radiant
£118 GBP