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Round|Lab Grown|IGI

1.59ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686409

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686409

Diamond specifications and retailer prices

From £152 GBP
$203 USD
As of October 29, 2026
Save £733 GBP (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £884 GBP at MOH London · As of October 29, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818686409 or 818686409. Listed at 15 retailers as of October 29, 2026, with prices from £152 to £884, a £733 spread on the same certified stone. MOH London lists it at £884. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686409
Dimensions7.49 × 7.47 × 4.59 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
7.49 mm7.47 mm1.59 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686409
Side View
Table 58.0%Crown 34.9°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.4%

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: Oct 29
Current: £884 GBP|Low: £152 GBP|High: £890 GBP|Avg: £467 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 7£152 GBP
Retailer 9£188 GBP
Retailer 10£326 GBP
Retailer 2£344 GBP
Retailer 4£345 GBP
Retailer 11£371 GBP
Retailer 6£487 GBP
Retailer 5£541 GBP
Retailer 3£645 GBP
Retailer 8£679 GBP
MOH London£884 GBP

39 data points across 11 retailers

15 retailers£152 GBP to £884 GBP

A
Cheapest Retailer
-
£152 GBP
$203 USD
A
Retailer 2
-
£176 GBP
$236 USD
View
A
Retailer 3
-
£188 GBP
$252 USD
View
A
Retailer 4
-
£188 GBP
$252 USD
View
B+
Retailer 5
-
£326 GBP
$437 USD
View
A
Retailer 6
-
£344 GBP
€439 EUR
View
A
Retailer 7
-
£345 GBP
View
A
Retailer 8
-
£371 GBP
$497 USD
View
B+
Retailer 9
-
£487 GBP
$653 USD
View
B+
Retailer 10
-
£534 GBP
$715 USD
View
Retailer 11
-
£541 GBP
$725 USD
View
Price last confirmed 13 days ago
B
Retailer 12
-
£605 GBP
$810 USD
View
B
Retailer 13
-
£645 GBP
$864 USD
View
B
Retailer 14
-
£679 GBP
$910 USD
View
Most Expensive
B
MOH London
LG818686409 · Oct 29
£884 GBP
View
14 more retailers have this diamond
Prices start from £152 GBPSave up to £733 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
£152 GBP