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Marquise|Lab Grown|IGI

1.31ct F VS1 Marquise Lab Grown Diamond

VG • F/VS1 • IGI LG623423017

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG623423017

Diamond specifications and retailer prices

From £209 GBP
$281 USD
As of November 2, 2026
Save £837 GBP (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,047 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.31ct lab-grown marquise diamond

This 1.31ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG623423017 or 623423017. Listed at 18 retailers as of October 29, 2026, with prices from £209 to £1,047, a £837 spread on the same certified stone. MOH London lists it at £1,047. 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

1.31
Carat
F
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623423017
Dimensions10.61 × 5.73 × 3.69 mm
L/W Ratio1.85
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
10.61 mm5.73 mm1.31 ctF / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623423017
Side View
Table 60.0%Crown 38°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 64.4%

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: £1,047 GBP|Low: £201 GBP|High: £1,053 GBP|Avg: £544 GBP|-0.5%
MOH London
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November 2, 2026
Retailer 21£209 GBP
Retailer 5£243 GBP
Retailer 3£260 GBP
Retailer 6£260 GBP
Retailer 18£312 GBP
Retailer 9£343 GBP
Retailer 13£376 GBP
Retailer 10£396 GBP
Retailer 20£428 GBP
Retailer 7£448 GBP
Retailer 2£448 GBP
Retailer 11£466 GBP
Retailer 15£469 GBP
Retailer 16£586 GBP
Retailer 17£592 GBP
Retailer 19£798 GBP
Retailer 4£835 GBP
Retailer 14£847 GBP
Retailer 8£943 GBP
Retailer 12£988 GBP
MOH London£1,047 GBP

31 data points across 21 retailers

18 retailers£209 GBP to £1,047 GBP

A
Cheapest Retailer
-
£209 GBP
$281 USD
A
Retailer 2
-
£243 GBP
$326 USD
View
Retailer 3
-
£260 GBP
$349 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
£260 GBP
$349 USD
View
Retailer 5
-
£343 GBP
HK$3,600 HKD
View
Price last confirmed 27 days ago
A
Retailer 6
-
£376 GBP
$505 USD
View
B+
Retailer 7
-
£396 GBP
$531 USD
View
B+
Retailer 8
-
£428 GBP
$575 USD
View
B+
Retailer 9
-
£448 GBP
$601 USD
View
B+
Retailer 10
-
£448 GBP
ZAR 9,711 ZAR
View
B+
Retailer 11
-
£469 GBP
A$968 AUD
View
B
Retailer 12
-
£586 GBP
A$1,210 AUD
View
B
Retailer 13
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£592 GBP
$795 USD
View
B
Retailer 14
-
£798 GBP
$1,071 USD
View
B
Retailer 15
-
£835 GBP
$1,121 USD
View
B
Retailer 16
-
£847 GBP
$1,137 USD
View
Retailer 17
-
£988 GBP
SGD 1,792 SGD
View
Price last confirmed 26 days ago
Most Expensive
B
MOH London
LG623423017 · Oct 29
£1,047 GBP
View
17 more retailers have this diamond
Prices start from £209 GBPSave up to £837 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
1.31ct Marquise
£209 GBP