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Radiant|Lab Grown|IGI

0.91ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG478113516

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

Certificate IGI LG478113516

Diamond specifications and retailer prices

From £158 GBP
$212 USD
As of November 1, 2026
Save £438 GBP (74%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £596 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.91ct lab-grown radiant diamond

This 0.91ct lab-grown radiant sits in the just-under-one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG478113516 or 478113516. Listed at 6 retailers as of November 1, 2026, with prices from £158 to £596, a £438 spread on the same certified stone. MOH London lists it at £596. 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

0.91
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.8°
Pavilion angle30.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478113516
Dimensions6.44 × 4.93 × 3.13 mm
L/W Ratio1.31
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
6.44 mm4.93 mm0.91 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478113516
Side View
Table 72.0%Crown 48.8°Girdle: STK-THKPavilion 30.5°Culet: NoneDepth 63.5%

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: Nov 1
Current: £596 GBP|Low: £156 GBP|High: £1,067 GBP|Avg: £371 GBP|-43.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 6£158 GBP
Retailer 4£167 GBP
Retailer 3£217 GBP
Retailer 2£262 GBP
Retailer 7£290 GBP
Retailer 5£540 GBP
MOH London£596 GBP

38 data points across 7 retailers

6 retailers£158 GBP to £596 GBP

B+
Cheapest Retailer
-
£158 GBP
$212 USD
A
Retailer 2
-
£167 GBP
$224 USD
View
A
Retailer 3
-
£217 GBP
View
B+
Retailer 4
-
£262 GBP
View
B
Retailer 5
-
£540 GBP
$725 USD
View
Most Expensive
B
MOH London
LG478113516 · Nov 1
£596 GBP
View
5 more retailers have this diamond
Prices start from £158 GBPSave up to £438 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
0.91ct Radiant
£158 GBP