CaratHunter
Plans
Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG689502441

Shape and cutting style on the report: Round brilliant

Certificate IGI LG689502441

Diamond specifications and retailer prices

From £110 GBP
$147 USD
As of October 29, 2026
Save £529 GBP (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £639 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round 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 LG689502441 or 689502441. Listed at 18 retailers as of October 29, 2026, with prices from £110 to £639, a £529 spread on the same certified stone. MOH London lists it at £639. 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

1.09
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689502441
Dimensions6.57 × 6.59 × 4.09 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.57 mm6.59 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689502441
Side View
Table 56.0%Crown 34.3°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.2%

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 29
Current: £639 GBP|Low: £105 GBP|High: £643 GBP|Avg: £270 GBP|+0.6%
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
Retailer 15
Retailer 16
October 30, 2026
Retailer 15£110 GBP
Retailer 3£122 GBP
Retailer 5£127 GBP
Retailer 8£136 GBP
Retailer 16£136 GBP
Retailer 7£183 GBP
Retailer 9£234 GBP
Retailer 10£237 GBP
Retailer 2£265 GBP
Retailer 14£299 GBP
Retailer 13£343 GBP
Retailer 12£348 GBP
Retailer 4£376 GBP
Retailer 11£381 GBP
Retailer 6£437 GBP
MOH London£639 GBP

43 data points across 16 retailers

18 retailers£110 GBP to £639 GBP

A
Cheapest Retailer
-
£110 GBP
$147 USD
A
Retailer 2
-
£122 GBP
$164 USD
View
Final sale: no returns
A
Retailer 3
-
£127 GBP
$170 USD
View
A
Retailer 4
-
£136 GBP
$182 USD
View
A
Retailer 5
-
£136 GBP
$182 USD
View
B+
Retailer 6
-
£183 GBP
$245 USD
View
A
Retailer 7
-
£230 GBP
$308 USD
View
A
Retailer 8
-
£234 GBP
View
A
Retailer 9
-
£237 GBP
€302 EUR
View
A
Retailer 10
-
£265 GBP
View
Retailer 11
-
£299 GBP
$400 USD
View
Price last confirmed 16 days ago
B+
Retailer 12
-
£343 GBP
A$708 AUD
View
B
Retailer 13
-
£348 GBP
$466 USD
View
B+
Retailer 14
-
£376 GBP
$504 USD
View
B+
Retailer 15
-
£381 GBP
$510 USD
View
Retailer 16
-
£417 GBP
$559 USD
View
Price last confirmed 44 days ago
B
Retailer 17
-
£437 GBP
$585 USD
View
Most Expensive
B
MOH London
LG689502441 · Oct 29
£639 GBP
View
17 more retailers have this diamond
Prices start from £110 GBPSave up to £529 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
1.09ct Round
£110 GBP