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Marquise|Lab Grown|IGI

1.09ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG689562578

Shape and cutting style on the report: Marquise modified brilliant

Certificate IGI LG689562578

Diamond specifications and retailer prices

From £190 GBP
$254 USD
As of October 30, 2026
Save £922 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,112 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.09ct lab-grown marquise diamond

This 1.09ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG689562578 or 689562578. Listed at 22 retailers as of October 30, 2026, with prices from £190 to £1,112, a £922 spread on the same certified stone. Brilliant Earth lists it at £1,112. 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
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle32.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689562578
Dimensions9.73 × 5.08 × 3.34 mm
L/W Ratio1.92
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.73 mm5.08 mm1.09 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689562578
Side View
Table 57.0%Crown 33°Girdle: MED-STKPavilion 32.2°Culet: NoneDepth 65.7%

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: £1,112 GBP|Low: £190 GBP|High: £1,373 GBP|Avg: £589 GBP|-19.0%
Brilliant Earth
Retailer 2
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Retailer 21
November 2, 2026
Retailer 4£190 GBP
Retailer 8£212 GBP
Retailer 12£220 GBP
Retailer 19£235 GBP
Retailer 21£235 GBP
Retailer 10£317 GBP
Retailer 3£355 GBP
Retailer 18£403 GBP
Retailer 13£406 GBP
Retailer 5£419 GBP
Retailer 2£448 GBP
Retailer 6£491 GBP
Retailer 15£559 GBP
Retailer 17£572 GBP
Retailer 11£691 GBP
Retailer 20£756 GBP
Retailer 7£794 GBP
Retailer 14£825 GBP
Retailer 16£947 GBP
Retailer 9£1,019 GBP
Brilliant Earth£1,112 GBP

30 data points across 21 retailers

22 retailers£190 GBP to £1,112 GBP

A
Cheapest Retailer
-
£190 GBP
$254 USD
A
Retailer 2
-
£212 GBP
$284 USD
View
Final sale: no returns
A
Retailer 3
-
£220 GBP
$295 USD
View
Retailer 4
-
£235 GBP
$315 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£235 GBP
$315 USD
View
A
Retailer 6
-
£317 GBP
$425 USD
View
A
Retailer 7
-
£355 GBP
$475 USD
View
A
Retailer 8
-
£403 GBP
€514 EUR
View
A
Retailer 9
-
£406 GBP
ZAR 8,786 ZAR
View
A
Retailer 10
-
£419 GBP
$561 USD
View
A
Retailer 11
-
£448 GBP
View
A
Retailer 12
-
£491 GBP
$658 USD
View
B+
Retailer 13
-
£559 GBP
$749 USD
View
B+
Retailer 14
-
£572 GBP
A$1,179 AUD
View
B+
Retailer 15
-
£594 GBP
$796 USD
View
B+
Retailer 16
-
£691 GBP
SGD 1,251 SGD
View
B+
Retailer 17
-
£756 GBP
$1,013 USD
View
B+
Retailer 18
-
£794 GBP
$1,064 USD
View
B+
Retailer 19
-
£825 GBP
$1,105 USD
View
B+
Retailer 20
-
£947 GBP
View
B
Retailer 21
-
£1,019 GBP
$1,366 USD
View
Most Expensive
B
Brilliant Earth
15473140A · Oct 31
£1,112 GBP
$1,490 USD
View
21 more retailers have this diamond
Prices start from £190 GBPSave up to £922 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 Marquise
£190 GBP