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Marquise|Lab Grown|IGI

1.09ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG790671715

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790671715

Diamond specifications and retailer prices

From £181 GBP
$242 USD
As of November 2, 2026
Save £1,200 GBP (87%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,381 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 LG790671715 or 790671715. Listed at 19 retailers as of October 31, 2026, with prices from £181 to £1,381, a £1,200 spread on the same certified stone. Brilliant Earth lists it at £1,381. 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
SymmetryVery Good
FluorescenceNone
Crown angle31.4°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790671715
Dimensions11.36 × 5.32 × 3.23 mm
L/W Ratio2.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.36 mm5.32 mm1.09 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG790671715
Side View
Table 57.0%Crown 31.4°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 60.7%

Caratlytics Score

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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: Nov 2
Current: £1,381 GBP|Low: £173 GBP|High: £1,478 GBP|Avg: £532 GBP|-6.6%
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
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 3£181 GBP
Retailer 17£202 GBP
Retailer 4£224 GBP
Retailer 8£224 GBP
Retailer 2£237 GBP
Retailer 16£302 GBP
Retailer 12£387 GBP
Retailer 14£403 GBP
Retailer 11£421 GBP
Retailer 7£455 GBP
Retailer 6£488 GBP
Retailer 9£604 GBP
Retailer 5£719 GBP
Retailer 15£722 GBP
Retailer 10£758 GBP
Retailer 13£902 GBP
Retailer 18£991 GBP
Brilliant Earth£1,381 GBP

38 data points across 18 retailers

19 retailers£181 GBP to £1,381 GBP

A
Cheapest Retailer
-
£181 GBP
$242 USD
A
Retailer 2
-
£202 GBP
$270 USD
View
Final sale: no returns
A
Retailer 3
-
£210 GBP
$281 USD
View
Retailer 4
-
£224 GBP
$300 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£224 GBP
$300 USD
View
A
Retailer 6
-
£237 GBP
View
A
Retailer 7
-
£302 GBP
$405 USD
View
A
Retailer 8
-
£387 GBP
ZAR 8,368 ZAR
View
Retailer 9
-
£403 GBP
€514 EUR
View
Price last confirmed 8 days ago
A
Retailer 10
-
£421 GBP
View
A
Retailer 11
-
£455 GBP
$609 USD
View
B+
Retailer 12
-
£488 GBP
$654 USD
View
B+
Retailer 13
-
£604 GBP
SGD 1,093 SGD
View
B+
Retailer 14
-
£719 GBP
$964 USD
View
B+
Retailer 15
-
£722 GBP
$968 USD
View
B+
Retailer 16
-
£758 GBP
$1,016 USD
View
B+
Retailer 17
-
£902 GBP
View
B
Retailer 18
-
£991 GBP
$1,327 USD
View
Most Expensive
B
Brilliant Earth
20608667A · Oct 31
£1,381 GBP
$1,850 USD
View
18 more retailers have this diamond
Prices start from £181 GBPSave up to £1,200 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
£181 GBP