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Radiant|Lab Grown|IGI

1.31ct E SI1 Radiant Lab Grown Diamond

GD • E/SI1 • IGI LG602355231

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

Certificate IGI LG602355231

Diamond specifications and retailer prices

From £118 GBP
$158 USD
As of October 27, 2026
Save £1,017 GBP (90%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,134 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.31ct lab-grown radiant diamond

This 1.31ct lab-grown radiant 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 standard cut grade and certified by IGI LG602355231 or 602355231. Listed at 10 retailers as of October 27, 2026, with prices from £118 to £1,134, a £1,017 spread on the same certified stone. Do Amore Diamonds lists it at £1,134. 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

1.31
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.3°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG602355231
Dimensions7.82 × 5.30 × 3.59 mm
L/W Ratio1.48
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.82 mm5.30 mm1.31 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG602355231
Side View
Table 66.0%Crown 42.3°Girdle: MediumPavilion 34°Culet: NoneDepth 67.7%

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: Oct 27
Current: £1,134 GBP|Low: £96 GBP|High: £1,231 GBP|Avg: £516 GBP|+1.3%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 18, 2026
Retailer 7£118 GBP
Retailer 10£132 GBP
Retailer 8£265 GBP
Retailer 3£274 GBP
Retailer 11£364 GBP
Retailer 12£375 GBP
Retailer 5£409 GBP
Retailer 6£496 GBP
Retailer 4£518 GBP
Retailer 13£672 GBP
Retailer 2£758 GBP
Retailer 9£911 GBP
Do Amore Diamonds£1,134 GBP

14 data points across 13 retailers

10 retailers£118 GBP to £1,134 GBP

A
Cheapest Retailer
-
£118 GBP
$158 USD
A
Retailer 2
-
£132 GBP
$177 USD
View
Final sale: no returns
A
Retailer 3
-
£137 GBP
$183 USD
View
B
Retailer 4
-
£265 GBP
$355 USD
View
B
Retailer 5
-
£496 GBP
$665 USD
View
B
Retailer 6
-
£519 GBP
$695 USD
View
B
Retailer 7
-
£672 GBP
$900 USD
View
Retailer 8
-
£758 GBP
View
Price last confirmed 9 days ago
C
Retailer 9
-
£911 GBP
$1,220 USD
View
Most Expensive
C
Do Amore Diamonds
27-89282A6CB · Oct 29
£1,134 GBP
$1,520 USD
View
9 more retailers have this diamond
Prices start from £118 GBPSave up to £1,017 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
1.31ct Radiant
£118 GBP