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Round|Lab Grown|IGI

1.55ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG794602526

Shape and cutting style on the report: Round brilliant

Certificate IGI LG794602526

Diamond specifications and retailer prices

From £239 GBP
$320 USD
As of November 1, 2026
Save £591 GBP (71%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £830 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct lab-grown round diamond

This 1.55ct 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 LG794602526 or 794602526. Listed at 6 retailers as of November 1, 2026, with prices from £239 to £830, a £591 spread on the same certified stone. MOH London lists it at £830. 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

1.55
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794602526
Dimensions7.41 × 7.44 × 4.56 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
7.41 mm7.44 mm1.55 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794602526
Side View
Table 58.0%Crown 34.7°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.4%

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: Nov 1
Current: £830 GBP|Low: £239 GBP|High: £840 GBP|Avg: £443 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 4£239 GBP
Retailer 2£320 GBP
Retailer 5£353 GBP
Retailer 3£371 GBP
Retailer 6£611 GBP
MOH London£830 GBP

38 data points across 6 retailers

6 retailers£239 GBP to £830 GBP

B+
Cheapest Retailer
-
£239 GBP
$320 USD
A
Retailer 2
-
£320 GBP
View
A
Retailer 3
-
£353 GBP
$473 USD
View
A
Retailer 4
-
£371 GBP
$497 USD
View
B+
Retailer 5
-
£611 GBP
$818 USD
View
Most Expensive
B
MOH London
LG794602526 · Nov 1
£830 GBP
View
5 more retailers have this diamond
Prices start from £239 GBPSave up to £591 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
1.55ct Round
£239 GBP