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Marquise|Lab Grown|IGI

1.09ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG778632689

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG778632689

Diamond specifications and retailer prices

From £195 GBP
$261 USD
As of November 2, 2026
Save £1,051 GBP (84%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,440 GBP at Brilliant Earth · As of September 24, 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 LG778632689 or 778632689. Listed at 24 retailers as of November 2, 2026, with a 539% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778632689
Dimensions11.33 × 5.31 × 3.20 mm
L/W Ratio2.13
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.33 mm5.31 mm1.09 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778632689
Side View
Table 57.0%Crown 33.3°Girdle: MED-STKPavilion 38.4°Culet: NoneDepth 60.3%

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: Nov 2
Current: £255 GBP|Low: £193 GBP|High: £1,035 GBP|Avg: £503 GBP|-0.1%
Retailer 1
Retailer 2
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Retailer 11
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Retailer 20
November 2, 2026
Retailer 5£195 GBP
Retailer 2£225 GBP
Retailer 8£225 GBP
Retailer 19£241 GBP
Retailer 20£241 GBP
Retailer 1£255 GBP
Retailer 16£373 GBP
Retailer 9£402 GBP
Retailer 14£416 GBP
Retailer 7£425 GBP
Retailer 18£429 GBP
Retailer 12£457 GBP
Retailer 6£493 GBP
Retailer 17£587 GBP
Retailer 4£643 GBP
Retailer 3£775 GBP
Retailer 11£814 GBP
Retailer 13£854 GBP
Retailer 15£967 GBP
Retailer 10£1,035 GBP

27 data points across 20 retailers

24 retailers£195 GBP to £1,246 GBP

A
Cheapest Retailer
-
£195 GBP
$261 USD
A
Retailer 2
-
£225 GBP
$302 USD
View
Final sale: no returns
A
Retailer 3
-
£225 GBP
$302 USD
View
Retailer 4
-
£241 GBP
$323 USD
View
Price last confirmed 8 days ago
A
Retailer 5
-
£241 GBP
$323 USD
View
A
Retailer 6
-
£255 GBP
View
A
Retailer 7
-
£373 GBP
$500 USD
View
A
Retailer 8
-
£402 GBP
$539 USD
View
A
Retailer 9
-
£416 GBP
ZAR 9,004 ZAR
View
A
Retailer 10
-
£425 GBP
$569 USD
View
A
Retailer 11
-
£429 GBP
€547 EUR
View
A
Retailer 12
-
£457 GBP
View
B+
Retailer 13
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£493 GBP
$661 USD
View
B+
Retailer 14
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£587 GBP
A$1,210 AUD
View
B+
Retailer 15
-
£643 GBP
$861 USD
View
B+
Retailer 16
-
£775 GBP
$1,039 USD
View
B
Retailer 17
-
£814 GBP
$1,090 USD
View
Retailer 18
-
£854 GBP
A$1,760 AUD
View
Price last confirmed 25 days ago
B
Retailer 19
-
£891 GBP
$1,194 USD
View
Retailer 20
-
£899 GBP
$1,205 USD
View
Price last confirmed 18 days ago
B+
Retailer 21
-
£967 GBP
View
B
Retailer 22
-
£1,035 GBP
$1,387 USD
View
B
Retailer 23
-
£1,246 GBP
$1,669 USD
View
Most Expensive
Brilliant Earth
21531701A · Sep 24
£1,440 GBP
$1,930 USD
View
Price last confirmed 38 days ago
23 more retailers have this diamond
Prices start from £195 GBPSave up to £1,051 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
£195 GBP