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Round|Lab Grown|IGI

1.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG675550843

Shape and cutting style on the report: Round brilliant

Certificate IGI LG675550843

Diamond specifications and retailer prices

From £113 GBP
$151 USD
As of October 29, 2026
Save £662 GBP (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £774 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

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 LG675550843 or 675550843. Listed at 15 retailers as of October 29, 2026, with prices from £113 to £774, a £662 spread on the same certified stone. Reve Diamonds lists it at £774. 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 angle33.4°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG675550843
Dimensions6.65 × 6.63 × 4.05 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
6.65 mm6.63 mm1.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG675550843
Side View
Table 59.0%Crown 33.4°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.0%

Caratlytics Score

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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 29
Current: £273 GBP|Low: £113 GBP|High: £774 GBP|Avg: £303 GBP|-9.9%
Retailer 1
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
Reve Diamonds
October 30, 2026
Retailer 4£113 GBP
Retailer 2£125 GBP
Retailer 3£131 GBP
Retailer 14£140 GBP
Retailer 6£155 GBP
Retailer 12£231 GBP
Retailer 7£243 GBP
Retailer 10£257 GBP
Retailer 1£273 GBP
Retailer 9£380 GBP
Retailer 13£449 GBP
Retailer 11£475 GBP
Retailer 5£491 GBP
Retailer 8£658 GBP
Reve Diamonds£774 GBP

42 data points across 15 retailers

15 retailers£113 GBP to £774 GBP

A
Cheapest Retailer
-
£113 GBP
$151 USD
A
Retailer 2
-
£125 GBP
$168 USD
View
Final sale: no returns
A
Retailer 3
-
£131 GBP
$175 USD
View
A
Retailer 4
-
£140 GBP
$187 USD
View
A
Retailer 5
-
£155 GBP
$208 USD
View
A
Retailer 6
-
£231 GBP
$310 USD
View
A
Retailer 7
-
£243 GBP
View
A
Retailer 8
-
£257 GBP
$344 USD
View
A
Retailer 9
-
£273 GBP
View
B+
Retailer 10
-
£380 GBP
$509 USD
View
B
Retailer 11
-
£449 GBP
$602 USD
View
B
Retailer 12
-
£475 GBP
$636 USD
View
B
Retailer 13
-
£491 GBP
$658 USD
View
B
Retailer 14
-
£658 GBP
View
Most Expensive
B
Reve Diamonds
5A1831A79 · Oct 30
£774 GBP
$1,038 USD
View
14 more retailers have this diamond
Prices start from £113 GBPSave up to £662 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
£113 GBP