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Radiant|Lab Grown|IGI

1.55ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG514271363

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG514271363

Diamond specifications and retailer prices

From £414 GBP
$555 USD
As of November 1, 2026
Save £1,504 GBP (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,918 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG514271363 or 514271363. Listed at 14 retailers as of October 26, 2026, with prices from £414 to £1,918, a £1,504 spread on the same certified stone. MOH London lists it at £1,918. 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
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.2°
Pavilion angle30.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514271363
Dimensions7.49 × 5.78 × 3.93 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizePointed
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
7.49 mm5.78 mm1.55 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514271363
Side View
Table 65.5%Crown 42.2°Girdle: MediumPavilion 30.2°Culet: NoneDepth 68.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,918 GBP|Low: £296 GBP|High: £1,939 GBP|Avg: £768 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 10£370 GBP
Retailer 3£414 GBP
Retailer 4£414 GBP
Retailer 11£459 GBP
Retailer 5£460 GBP
Retailer 9£563 GBP
Retailer 6£668 GBP
Retailer 13£714 GBP
Retailer 2£757 GBP
Retailer 7£881 GBP
Retailer 12£1,207 GBP
Retailer 8£1,234 GBP
MOH London£1,918 GBP

43 data points across 13 retailers

14 retailers£414 GBP to £1,918 GBP

Retailer 1
-
£370 GBP
$496 USD
Price last confirmed 9 days ago
B+
Retailer 2
-
£414 GBP
$555 USD
View
Final sale: no returns
Retailer 3
-
£414 GBP
$555 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£459 GBP
$615 USD
View
B+
Retailer 5
-
£460 GBP
$617 USD
View
B
Retailer 6
-
£563 GBP
$755 USD
View
B
Retailer 7
-
£668 GBP
€853 EUR
View
B
Retailer 8
-
£714 GBP
$957 USD
View
B
Retailer 9
-
£757 GBP
View
B
Retailer 10
-
£881 GBP
$1,180 USD
View
B
Retailer 11
-
£1,067 GBP
View
Retailer 12
-
£1,207 GBP
$1,617 USD
View
Price last confirmed 7 days ago
C
Retailer 13
-
£1,234 GBP
$1,653 USD
View
Most Expensive
B
MOH London
LG514271363 · Oct 26
£1,918 GBP
View
13 more retailers have this diamond
Prices start from £414 GBPSave up to £1,504 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 Radiant
£414 GBP