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Round|Lab Grown|IGI

1.59ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG436045603

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436045603

Diamond specifications and retailer prices

From £657 GBP
$880 USD
As of October 30, 2026
Save £2,978 GBP (82%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,635 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436045603 or 436045603. Listed at 10 retailers as of October 29, 2026, with prices from £657 to £3,635, a £2,978 spread on the same certified stone. MOH London lists it at £3,635. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045603
Dimensions7.41 × 7.47 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.41 mm7.47 mm1.59 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436045603
Side View
Table 61.5%Crown 35.5°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £3,635 GBP|Low: £657 GBP|High: £3,659 GBP|Avg: £1,801 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 2£657 GBP
Retailer 4£1,055 GBP
Retailer 5£1,087 GBP
Retailer 7£1,553 GBP
Retailer 3£1,781 GBP
Retailer 6£2,097 GBP
Retailer 8£2,519 GBP
MOH London£3,635 GBP

12 data points across 8 retailers

10 retailers£657 GBP to £3,635 GBP

A
Cheapest Retailer
-
£657 GBP
$880 USD
B+
Retailer 2
-
£970 GBP
$1,300 USD
View
B+
Retailer 3
-
£1,055 GBP
$1,414 USD
View
B+
Retailer 4
-
£1,087 GBP
$1,456 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,125 GBP
$1,508 USD
View
Retailer 6
-
£1,125 GBP
$1,508 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
£1,781 GBP
$2,386 USD
View
B
Retailer 8
-
£2,097 GBP
$2,810 USD
View
B
Retailer 9
-
£2,109 GBP
$2,826 USD
View
Most Expensive
B
MOH London
LG436045603 · Oct 29
£3,635 GBP
View
9 more retailers have this diamond
Prices start from £657 GBPSave up to £2,978 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
£657 GBP