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Marquise|Lab Grown|IGI

0.50ct E FL Marquise Lab Grown Diamond

ID • E/FL • IGI LG818663121

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818663121

Diamond specifications and retailer prices

From £199 GBP
$267 USD
As of October 31, 2026
Save £785 GBP (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £985 GBP at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 0.5ct lab-grown marquise diamond

This 0.5ct lab-grown marquise sits in the half to three-quarter carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818663121 or 818663121. Listed at 19 retailers as of October 30, 2026, with prices from £199 to £985, a £785 spread on the same certified stone. Reve Diamonds lists it at £985. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.50
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818663121
Dimensions8.16 × 4.10 × 2.56 mm
L/W Ratio1.99
Girdle conditionFaceted
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
8.16 mm4.10 mm0.50 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818663121
Side View
Table 60.0%Crown 36.1°Girdle: MediumPavilion 40.1°Culet: NoneDepth 62.4%

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 31
Current: £416 GBP|Low: £142 GBP|High: £1,035 GBP|Avg: £487 GBP|-5.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Reve Diamonds
October 31, 2026
Retailer 4£199 GBP
Retailer 2£222 GBP
Retailer 12£269 GBP
Retailer 13£312 GBP
Retailer 11£347 GBP
Retailer 6£366 GBP
Retailer 9£368 GBP
Retailer 8£401 GBP
Retailer 1£416 GBP
Retailer 3£484 GBP
Retailer 10£714 GBP
Retailer 5£751 GBP
Retailer 7£893 GBP
Reve Diamonds£985 GBP

35 data points across 14 retailers

19 retailers£199 GBP to £985 GBP

Retailer 1
-
£178 GBP
$239 USD
Price last confirmed 23 days ago
A
Retailer 2
-
£199 GBP
$267 USD
View
Final sale: no returns
Retailer 3
-
£207 GBP
$278 USD
View
Price last confirmed 32 days ago
Retailer 4
-
£219 GBP
$293 USD
View
Price last confirmed 36 days ago
Retailer 5
-
£222 GBP
$297 USD
View
Price last confirmed 19 days ago
Retailer 6
-
£222 GBP
$297 USD
View
Price last confirmed 28 days ago
A
Retailer 7
-
£269 GBP
$361 USD
View
A
Retailer 8
-
£312 GBP
$418 USD
View
A
Retailer 9
-
£347 GBP
$465 USD
View
B+
Retailer 10
-
£366 GBP
$490 USD
View
B+
Retailer 11
-
£368 GBP
€469 EUR
View
B+
Retailer 12
-
£401 GBP
ZAR 8,672 ZAR
View
B+
Retailer 13
-
£416 GBP
View
B+
Retailer 14
-
£484 GBP
$648 USD
View
Retailer 15
-
£712 GBP
$954 USD
View
Price last confirmed 31 days ago
B
Retailer 16
-
£714 GBP
$957 USD
View
B
Retailer 17
-
£751 GBP
$1,006 USD
View
B
Retailer 18
-
£893 GBP
View
Most Expensive
B
Reve Diamonds
C1C484CBD · Oct 30
£985 GBP
$1,319 USD
View
18 more retailers have this diamond
Prices start from £199 GBPSave up to £785 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
0.50ct Marquise
£199 GBP