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Marquise|Lab Grown|IGI

1.50ct F VS1 Marquise Lab Grown Diamond

EX • F/VS1 • IGI LG850630371

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG850630371

Diamond specifications and retailer prices

From £189 GBP
$254 USD
As of November 2, 2026
Save £1,119 GBP (86%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,309 GBP at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

About this 1.5ct lab-grown marquise diamond

This 1.5ct lab-grown marquise sits in the one-and-a-half to two carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG850630371 or 850630371. Listed at 19 retailers as of November 1, 2026, with prices from £189 to £1,309, a £1,119 spread on the same certified stone. Helzberg Diamonds lists it at £1,309. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.50
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle30°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG850630371
Dimensions11.90 × 6.04 × 3.67 mm
L/W Ratio1.97
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.90 mm6.04 mm1.50 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG850630371
Side View
Table 56.0%Crown 30°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 60.8%

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: Nov 2
Current: £1,309 GBP|Low: £189 GBP|High: £1,309 GBP|Avg: £598 GBP
Helzberg Diamonds
Retailer 2
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Retailer 18
November 2, 2026
Retailer 15£189 GBP
Retailer 17£235 GBP
Retailer 5£267 GBP
Retailer 2£275 GBP
Retailer 9£317 GBP
Retailer 18£354 GBP
Retailer 16£386 GBP
Retailer 12£406 GBP
Retailer 11£448 GBP
Retailer 3£487 GBP
Retailer 14£722 GBP
Retailer 4£756 GBP
Retailer 10£771 GBP
Retailer 8£794 GBP
Retailer 7£925 GBP
Retailer 13£943 GBP
Retailer 6£969 GBP
Helzberg Diamonds£1,309 GBP

6 data points across 18 retailers

19 retailers£189 GBP to £1,309 GBP

A
Cheapest Retailer
-
£189 GBP
$254 USD
A
Retailer 2
-
£235 GBP
$316 USD
View
A
Retailer 3
-
£267 GBP
HK$2,800 HKD
View
A
Retailer 4
-
£275 GBP
View
B+
Retailer 5
-
£317 GBP
$425 USD
View
A
Retailer 6
-
£354 GBP
$475 USD
View
A
Retailer 7
-
£386 GBP
$518 USD
View
A
Retailer 8
-
£406 GBP
ZAR 8,802 ZAR
View
A
Retailer 9
-
£448 GBP
View
A
Retailer 10
-
£487 GBP
$653 USD
View
B+
Retailer 11
-
£722 GBP
$969 USD
View
B+
Retailer 12
-
£756 GBP
$1,014 USD
View
B
Retailer 13
-
£771 GBP
SGD 1,399 SGD
View
B
Retailer 14
-
£794 GBP
$1,066 USD
View
B
Retailer 15
-
£925 GBP
$1,241 USD
View
B
Retailer 16
-
£943 GBP
View
B
Retailer 17
-
£969 GBP
$1,300 USD
View
B
Retailer 18
-
£1,237 GBP
$1,660 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOLGMJGJNH · Nov 1
£1,309 GBP
$1,756 USD
View
18 more retailers have this diamond
Prices start from £189 GBPSave up to £1,119 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
1.50ct Marquise
£189 GBP