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Round|Lab Grown|IGI

1.59ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG706511921

Shape and cutting style on the report: Round brilliant

Certificate IGI LG706511921

Diamond specifications and retailer prices

From £162 GBP
$218 USD
As of November 1, 2026
Save £644 GBP (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £806 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.59ct lab-grown round diamond

This 1.59ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG706511921 or 706511921. Listed at 15 retailers as of November 1, 2026, with prices from £162 to £806, a £644 spread on the same certified stone. MOH London lists it at £806. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.59
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG706511921
Dimensions7.50 × 7.53 × 4.57 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.50 mm7.53 mm1.59 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG706511921
Side View
Table 61.0%Crown 33.7°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £806 GBP|Low: £152 GBP|High: £816 GBP|Avg: £415 GBP|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 3, 2026
Retailer 11£162 GBP
Retailer 4£188 GBP
Retailer 5£201 GBP
Retailer 12£201 GBP
Retailer 9£333 GBP
Retailer 14£344 GBP
Retailer 3£350 GBP
Retailer 2£369 GBP
Retailer 10£369 GBP
Retailer 13£449 GBP
Retailer 8£530 GBP
Retailer 7£592 GBP
Retailer 15£647 GBP
Retailer 6£686 GBP
MOH London£806 GBP

39 data points across 15 retailers

15 retailers£162 GBP to £806 GBP

A
Cheapest Retailer
-
£162 GBP
$218 USD
A
Retailer 2
-
£188 GBP
$252 USD
View
A
Retailer 3
-
£201 GBP
$270 USD
View
Retailer 4
-
£201 GBP
$270 USD
View
Price last confirmed 9 days ago
A
Retailer 5
-
£333 GBP
€426 EUR
View
B+
Retailer 6
-
£344 GBP
$462 USD
View
A
Retailer 7
-
£350 GBP
$470 USD
View
B+
Retailer 8
-
£369 GBP
View
A
Retailer 9
-
£369 GBP
View
B+
Retailer 10
-
£449 GBP
$602 USD
View
B+
Retailer 11
-
£530 GBP
$711 USD
View
Retailer 12
-
£592 GBP
$795 USD
View
Price last confirmed 15 days ago
B
Retailer 13
-
£647 GBP
$868 USD
View
B
Retailer 14
-
£686 GBP
$920 USD
View
Most Expensive
B
MOH London
LG706511921 · Nov 1
£806 GBP
View
14 more retailers have this diamond
Prices start from £162 GBPSave up to £644 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
1.59ct Round
£162 GBP