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Marquise|Lab Grown|IGI

1.18ct E IF Marquise Lab Grown Diamond

VG • E/IF • IGI LG733574293

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG733574293

Diamond specifications and retailer prices

From £164 GBP
$220 USD
As of October 30, 2026
Save £1,052 GBP (87%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,217 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

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 IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG733574293 or 733574293. Listed at 18 retailers as of October 30, 2026, with prices from £164 to £1,217, a £1,052 spread on the same certified stone. Brilliant Earth lists it at £1,217. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.18
Carat
E
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG733574293
Dimensions10.39 × 5.46 × 3.59 mm
L/W Ratio1.90
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
10.39 mm5.46 mm1.18 ctE / IF
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG733574293
Side View
Table 57.0%Crown 34°Girdle: STK-THKPavilion 41.4°Culet: NoneDepth 65.8%

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: £1,217 GBP|Low: £164 GBP|High: £1,687 GBP|Avg: £581 GBP|-27.9%
Brilliant Earth
Retailer 2
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Retailer 11
Retailer 12
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Retailer 18
November 1, 2026
Retailer 12£164 GBP
Retailer 18£183 GBP
Retailer 13£203 GBP
Retailer 8£211 GBP
Retailer 4£348 GBP
Retailer 6£349 GBP
Retailer 10£362 GBP
Retailer 7£364 GBP
Retailer 2£378 GBP
Retailer 16£383 GBP
Retailer 11£547 GBP
Retailer 17£554 GBP
Retailer 3£693 GBP
Retailer 14£699 GBP
Retailer 15£819 GBP
Retailer 9£929 GBP
Retailer 5£937 GBP
Brilliant Earth£1,217 GBP

38 data points across 18 retailers

18 retailers£164 GBP to £1,217 GBP

A
Cheapest Retailer
-
£164 GBP
$220 USD
A
Retailer 2
-
£183 GBP
$245 USD
View
Final sale: no returns
A
Retailer 3
-
£203 GBP
$272 USD
View
A
Retailer 4
-
£211 GBP
$283 USD
View
A
Retailer 5
-
£348 GBP
$466 USD
View
A
Retailer 6
-
£349 GBP
ZAR 7,556 ZAR
View
Retailer 7
-
£362 GBP
$485 USD
View
Price last confirmed 14 days ago
A
Retailer 8
-
£364 GBP
€464 EUR
View
A
Retailer 9
-
£378 GBP
View
A
Retailer 10
-
£383 GBP
$513 USD
View
B+
Retailer 11
-
£547 GBP
$733 USD
View
B+
Retailer 12
-
£554 GBP
$742 USD
View
B+
Retailer 13
-
£693 GBP
$928 USD
View
B+
Retailer 14
-
£699 GBP
$936 USD
View
B
Retailer 15
-
£819 GBP
View
Retailer 16
-
£929 GBP
$1,245 USD
View
Price last confirmed 25 days ago
B
Retailer 17
-
£937 GBP
$1,256 USD
View
Most Expensive
B
Brilliant Earth
16731658A · Oct 31
£1,217 GBP
$1,630 USD
View
17 more retailers have this diamond
Prices start from £164 GBPSave up to £1,052 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
£164 GBP