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Marquise|Lab Grown|IGI

1.03ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG678573572

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG678573572

Diamond specifications and retailer prices

From £149 GBP
$199 USD
As of October 30, 2026
Save £889 GBP (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,037 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.03ct lab-grown marquise diamond

This 1.03ct 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 LG678573572 or 678573572. Listed at 13 retailers as of October 30, 2026, with prices from £149 to £1,037, a £889 spread on the same certified stone. Brilliant Earth lists it at £1,037. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG678573572
Dimensions10.13 × 5.45 × 3.30 mm
L/W Ratio1.86
Girdle conditionFaceted
Culet sizePointed
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
10.13 mm5.45 mm1.03 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG678573572
Side View
Table 58.0%Crown 33.1°Girdle: MediumPavilion 39.7°Culet: NoneDepth 60.6%

Caratlytics Score

How it works →
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: £1,037 GBP|Low: £149 GBP|High: £1,306 GBP|Avg: £535 GBP|-20.6%
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
October 30, 2026
Retailer 3£149 GBP
Retailer 11£172 GBP
Retailer 5£207 GBP
Retailer 14£257 GBP
Retailer 10£317 GBP
Retailer 6£351 GBP
Retailer 12£361 GBP
Retailer 7£394 GBP
Retailer 2£450 GBP
Retailer 8£458 GBP
Retailer 13£481 GBP
Retailer 15£592 GBP
Retailer 16£643 GBP
Retailer 4£843 GBP
Retailer 9£863 GBP
Brilliant Earth£1,037 GBP

33 data points across 16 retailers

13 retailers£149 GBP to £1,037 GBP

A
Cheapest Retailer
-
£149 GBP
$199 USD
A
Retailer 2
-
£172 GBP
$231 USD
View
A
Retailer 3
-
£207 GBP
$278 USD
View
Final sale: no returns
A
Retailer 4
-
£257 GBP
$345 USD
View
A
Retailer 5
-
£317 GBP
€405 EUR
View
A
Retailer 6
-
£361 GBP
$484 USD
View
A
Retailer 7
-
£450 GBP
A$928 AUD
View
B+
Retailer 8
-
£481 GBP
$645 USD
View
B+
Retailer 9
-
£592 GBP
$793 USD
View
B+
Retailer 10
-
£643 GBP
$861 USD
View
B
Retailer 11
-
£843 GBP
$1,130 USD
View
B
Retailer 12
-
£863 GBP
View
Most Expensive
B
Brilliant Earth
14093526A · Oct 30
£1,037 GBP
$1,390 USD
View
12 more retailers have this diamond
Prices start from £149 GBPSave up to £889 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
1.03ct Marquise
£149 GBP