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Round|Lab Grown|IGI

1.58ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG825658780

Shape and cutting style on the report: Round brilliant

Certificate IGI LG825658780

Diamond specifications and retailer prices

From £149 GBP
$200 USD
As of October 29, 2026
Save £720 GBP (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £869 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.58ct lab-grown round diamond

This 1.58ct 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 LG825658780 or 825658780. Listed at 14 retailers as of October 29, 2026, with prices from £149 to £869, a £720 spread on the same certified stone. MOH London lists it at £869. 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

1.58
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825658780
Dimensions7.53 × 7.47 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.53 mm7.47 mm1.58 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825658780
Side View
Table 57.0%Crown 35.2°Girdle: THN-MEDPavilion 40.5°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
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: £869 GBP|Low: £149 GBP|High: £875 GBP|Avg: £458 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£149 GBP
Retailer 9£185 GBP
Retailer 2£309 GBP
Retailer 10£322 GBP
Retailer 4£338 GBP
Retailer 11£366 GBP
Retailer 6£478 GBP
Retailer 5£534 GBP
Retailer 3£634 GBP
Retailer 8£672 GBP
MOH London£869 GBP

43 data points across 11 retailers

14 retailers£149 GBP to £869 GBP

A
Cheapest Retailer
-
£149 GBP
$200 USD
A
Retailer 2
-
£173 GBP
$232 USD
View
A
Retailer 3
-
£185 GBP
$248 USD
View
A
Retailer 4
-
£185 GBP
$248 USD
View
A
Retailer 5
-
£309 GBP
€394 EUR
View
B+
Retailer 6
-
£322 GBP
$431 USD
View
A
Retailer 7
-
£338 GBP
View
A
Retailer 8
-
£366 GBP
$491 USD
View
B+
Retailer 9
-
£478 GBP
$640 USD
View
B+
Retailer 10
-
£534 GBP
$715 USD
View
B+
Retailer 11
-
£594 GBP
$796 USD
View
B
Retailer 12
-
£634 GBP
$850 USD
View
B
Retailer 13
-
£672 GBP
$900 USD
View
Most Expensive
B
MOH London
LG825658780 · Oct 29
£869 GBP
View
13 more retailers have this diamond
Prices start from £149 GBPSave up to £720 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
1.58ct Round
£149 GBP