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Round|Lab Grown|IGI

1.09ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG818671756

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818671756

Diamond specifications and retailer prices

From £202 GBP
$270 USD
As of October 30, 2026
Save £806 GBP (80%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,008 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818671756 or 818671756. Listed at 21 retailers as of October 30, 2026, with prices from £202 to £1,008, a £806 spread on the same certified stone. Brilliant Earth lists it at £1,008. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818671756
Dimensions6.62 × 6.59 × 4.08 mm
L/W Ratio1.00
Girdle conditionFaceted
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
6.62 mm6.59 mm1.09 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818671756
Side View
Table 56.0%Crown 34.7°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.7%

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 30
Current: £1,008 GBP|Low: £154 GBP|High: £1,142 GBP|Avg: £518 GBP|-11.8%
Brilliant Earth
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
October 31, 2026
Retailer 14£202 GBP
Retailer 6£240 GBP
Retailer 7£243 GBP
Retailer 10£315 GBP
Retailer 9£373 GBP
Retailer 5£373 GBP
Retailer 12£385 GBP
Retailer 13£410 GBP
Retailer 2£423 GBP
Retailer 15£490 GBP
Retailer 8£557 GBP
Retailer 4£758 GBP
Retailer 3£899 GBP
Retailer 11£991 GBP
Brilliant Earth£1,008 GBP

36 data points across 15 retailers

21 retailers£202 GBP to £1,008 GBP

Retailer 1
-
£190 GBP
$255 USD
Price last confirmed 21 days ago
Retailer 2
-
£193 GBP
$259 USD
View
Price last confirmed 39 days ago
A
Retailer 3
-
£202 GBP
$270 USD
View
Final sale: no returns
Retailer 4
-
£224 GBP
$300 USD
View
Price last confirmed 39 days ago
Retailer 5
-
£236 GBP
$316 USD
View
Price last confirmed 19 days ago
Retailer 6
-
£236 GBP
$316 USD
View
Price last confirmed 29 days ago
Retailer 7
-
£237 GBP
$317 USD
View
Price last confirmed 36 days ago
A
Retailer 8
-
£315 GBP
$422 USD
View
A
Retailer 9
-
£373 GBP
€476 EUR
View
Retailer 10
-
£373 GBP
$500 USD
View
Price last confirmed 5 days ago
A
Retailer 11
-
£385 GBP
ZAR 8,324 ZAR
View
A
Retailer 12
-
£410 GBP
$549 USD
View
A
Retailer 13
-
£423 GBP
View
B+
Retailer 14
-
£490 GBP
$656 USD
View
B+
Retailer 15
-
£557 GBP
$746 USD
View
B
Retailer 16
-
£758 GBP
$1,016 USD
View
Retailer 17
-
£759 GBP
$1,017 USD
View
Price last confirmed 31 days ago
Retailer 18
-
£770 GBP
$1,032 USD
View
Price last confirmed 34 days ago
B+
Retailer 19
-
£899 GBP
View
B
Retailer 20
-
£991 GBP
$1,327 USD
View
Most Expensive
B
Brilliant Earth
21242396A · Oct 30
£1,008 GBP
$1,350 USD
View
20 more retailers have this diamond
Prices start from £202 GBPSave up to £806 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
£202 GBP