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Round|Lab Grown|IGI

1.29ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG589323095

Shape and cutting style on the report: Round brilliant

Certificate IGI LG589323095

Diamond specifications and retailer prices

From £250 GBP
As of November 5, 2026
Save £423 GBP (63%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £673 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.29ct lab-grown round diamond

This 1.29ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG589323095 or 589323095. Listed at 8 retailers as of November 4, 2026, with prices from £250 to £673, a £423 spread on the same certified stone. MOH London lists it at £673. 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

1.29
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG589323095
Dimensions6.99 × 6.97 × 4.31 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.99 mm6.97 mm1.29 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG589323095
Side View
Table 59.0%Crown 35.2°Girdle: MediumPavilion 41.3°Culet: NoneDepth 61.7%

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 5
Current: £673 GBP|Low: £230 GBP|High: £765 GBP|Avg: £411 GBP|+2.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 2£250 GBP
Retailer 6£262 GBP
Retailer 7£284 GBP
Retailer 3£305 GBP
Retailer 5£342 GBP
Retailer 8£345 GBP
Retailer 4£490 GBP
MOH London£673 GBP
Retailer 9£765 GBP

31 data points across 9 retailers

8 retailers£250 GBP to £673 GBP

Retailer 1
-
£139 GBP
Price last confirmed 29 days ago
A
Retailer 2
-
£250 GBP
View
B+
Retailer 3
-
£262 GBP
View
A
Retailer 4
-
£305 GBP
View
B+
Retailer 5
-
£342 GBP
View
B+
Retailer 6
-
£345 GBP
View
B
Retailer 7
-
£490 GBP
View
Most Expensive
B
MOH London
LG589323095 · Nov 4
£673 GBP
View
7 more retailers have this diamond
Prices start from £250 GBPSave up to £423 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
1.29ct Round
£250 GBP