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Marquise|Lab Grown|IGI

1.18ct E VVS1 Marquise Lab Grown Diamond

ID • E/VVS1 • IGI LG840647620

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG840647620

Diamond specifications and retailer prices

From £143 GBP
$190 USD
As of October 30, 2026
Save £690 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,155 GBP at Helzberg Diamonds · As of October 13, 2026
View at Helzberg Diamonds

About this 1.18ct lab-grown marquise diamond

This 1.18ct lab-grown marquise sits in the classic one-carat band, graded E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG840647620 or 840647620. Listed at 22 retailers as of October 29, 2026, with a 484% 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

1.18
Carat
E
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.2°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840647620
Dimensions10.66 × 5.44 × 3.44 mm
L/W Ratio1.96
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.66 mm5.44 mm1.18 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840647620
Side View
Table 59.0%Crown 39.2°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 63.2%

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: £143 GBP|Low: £143 GBP|High: £856 GBP|Avg: £396 GBP|-2.6%
Retailer 1
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Retailer 21
October 30, 2026
Retailer 1£143 GBP
Retailer 20£160 GBP
Retailer 11£167 GBP
Retailer 18£177 GBP
Retailer 10£178 GBP
Retailer 16£217 GBP
Retailer 12£239 GBP
Retailer 9£292 GBP
Retailer 5£305 GBP
Retailer 15£322 GBP
Retailer 17£396 GBP
Retailer 13£418 GBP
Retailer 6£434 GBP
Retailer 2£569 GBP
Retailer 14£574 GBP
Retailer 21£576 GBP
Retailer 19£595 GBP
Retailer 3£610 GBP
Retailer 4£691 GBP
Retailer 8£719 GBP
Retailer 7£833 GBP

18 data points across 21 retailers

22 retailers£143 GBP to £833 GBP

A
Cheapest Retailer
-
£143 GBP
$190 USD
A
Retailer 2
-
£160 GBP
$213 USD
View
Final sale: no returns
A
Retailer 3
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£167 GBP
$222 USD
View
A
Retailer 4
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£177 GBP
$236 USD
View
A
Retailer 5
-
£178 GBP
$237 USD
View
A
Retailer 6
-
£217 GBP
View
B+
Retailer 7
-
£239 GBP
$318 USD
View
A
Retailer 8
-
£292 GBP
€370 EUR
View
A
Retailer 9
-
£305 GBP
ZAR 6,571 ZAR
View
A
Retailer 10
-
£322 GBP
View
A
Retailer 11
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£396 GBP
$528 USD
View
A
Retailer 12
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£418 GBP
$557 USD
View
B+
Retailer 13
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£434 GBP
A$889 AUD
View
B+
Retailer 14
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£569 GBP
$758 USD
View
B+
Retailer 15
-
£574 GBP
$764 USD
View
B+
Retailer 16
-
£576 GBP
SGD 1,037 SGD
View
B+
Retailer 17
-
£595 GBP
$792 USD
View
B+
Retailer 18
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£610 GBP
$812 USD
View
B
Retailer 19
-
£691 GBP
$920 USD
View
B+
Retailer 20
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£719 GBP
A$1,474 AUD
View
B
Retailer 21
-
£833 GBP
View
Most Expensive
Helzberg Diamonds
ZXZOKGMKNMIG · Oct 13
£1,155 GBP
$1,538 USD
View
Price last confirmed 17 days ago
21 more retailers have this diamond
Prices start from £143 GBPSave up to £690 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
1.18ct Marquise
£143 GBP