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1.55ct G I1 Round Lab Grown Diamond

VG • G/I1 • IGI LG480178419

Shape and cutting style on the report: Round brilliant

Certificate IGI LG480178419

Diamond specifications and retailer prices

From £338 GBP
$453 USD
As of November 1, 2026
Save £455 GBP (57%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £793 GBP at MOH London · As of October 29, 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 I1 clarity (included), with a very-good cut grade and certified by IGI LG480178419 or 480178419. Listed at 2 retailers as of October 29, 2026, with prices from £338 to £793, a £455 spread on the same certified stone. MOH London lists it at £793. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.55
Carat
G
Colour
I1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG480178419
Dimensions7.29 × 7.25 × 4.67 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.29 mm7.25 mm1.55 ctG / I1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG480178419
Side View
Table 56.0%Crown 36.1°Girdle: STK-THKPavilion 41°CuletDepth 64.2%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 1
Current: £793 GBP|Low: £319 GBP|High: £799 GBP|Avg: £563 GBP|+0.4%
MOH London
Retailer 2
October 29, 2026
Retailer 2£338 GBP
MOH London£793 GBP

10 data points across 2 retailers

2 retailers£338 GBP to £793 GBP

B
Cheapest Retailer
-
£338 GBP
$453 USD
Most Expensive
B
MOH London
LG480178419 · Oct 29
£793 GBP
View
1 more retailer has this diamond
Prices start from £338 GBPSave up to £455 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.

B
1.55ct Round
£338 GBP