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Marquise|Lab Grown|IGI

1.03ct E VS1 Marquise Lab Grown Diamond

ID • E/VS1 • IGI LG770628037

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG770628037

Diamond specifications and retailer prices

From £128 GBP
$170 USD
As of October 30, 2026
Save £611 GBP (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £803 GBP at Brilliant Earth · As of October 16, 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG770628037 or 770628037. Listed at 18 retailers as of October 26, 2026, with a 479% 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

1.03
Carat
E
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG770628037
Dimensions9.61 × 5.33 × 3.40 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.61 mm5.33 mm1.03 ctE / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG770628037
Side View
Table 60.0%Crown 36.5°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 63.8%

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: £803 GBP|Low: £122 GBP|High: £803 GBP|Avg: £324 GBP
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 12£128 GBP
Retailer 6£142 GBP
Retailer 4£148 GBP
Retailer 14£158 GBP
Retailer 16£158 GBP
Retailer 9£198 GBP
Retailer 8£219 GBP
Retailer 11£271 GBP
Retailer 2£281 GBP
Retailer 10£302 GBP
Retailer 13£385 GBP
Retailer 7£396 GBP
Retailer 15£508 GBP
Retailer 5£536 GBP
Retailer 3£739 GBP
Brilliant Earth£803 GBP

44 data points across 16 retailers

18 retailers£128 GBP to £739 GBP

A
Cheapest Retailer
-
£128 GBP
$170 USD
A
Retailer 2
-
£142 GBP
$189 USD
View
Final sale: no returns
A
Retailer 3
-
£148 GBP
$197 USD
View
A
Retailer 4
-
£158 GBP
$210 USD
View
A
Retailer 5
-
£158 GBP
$210 USD
View
A
Retailer 6
-
£198 GBP
View
B+
Retailer 7
-
£219 GBP
$292 USD
View
A
Retailer 8
-
£248 GBP
$330 USD
View
A
Retailer 9
-
£271 GBP
ZAR 5,831 ZAR
View
A
Retailer 10
-
£281 GBP
View
A
Retailer 11
-
£302 GBP
€383 EUR
View
B+
Retailer 12
-
£385 GBP
A$788 AUD
View
B+
Retailer 13
-
£396 GBP
$527 USD
View
B
Retailer 14
-
£508 GBP
$676 USD
View
B
Retailer 15
-
£536 GBP
$714 USD
View
B
Retailer 16
-
£549 GBP
$730 USD
View
B
Retailer 17
-
£739 GBP
View
Most Expensive
Brilliant Earth
18310494A · Oct 16
£803 GBP
$1,070 USD
View
Price last confirmed 14 days ago
17 more retailers have this diamond
Prices start from £128 GBPSave up to £611 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
£128 GBP