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Radiant|Lab Grown|IGI

0.81ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG648465420

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

Certificate IGI LG648465420

Diamond specifications and retailer prices

From £93 GBP
$125 USD
As of October 30, 2026
Save £299 GBP (76%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £393 GBP at Friendly Diamonds · As of October 31, 2026
View at Friendly Diamonds

About this 0.81ct lab-grown radiant diamond

This 0.81ct lab-grown radiant sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG648465420 or 648465420. Listed at 12 retailers as of October 30, 2026, with prices from £93 to £393, a £299 spread on the same certified stone. Friendly Diamonds lists it at £393. 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

0.81
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.8°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG648465420
Dimensions6.43 × 4.60 × 3.10 mm
L/W Ratio1.40
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.43 mm4.60 mm0.81 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG648465420
Side View
Table 67.0%Crown 46.8°Girdle: MED-STKPavilion 35.9°Culet: NoneDepth 67.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £393 GBP|Low: £93 GBP|High: £560 GBP|Avg: £243 GBP
Friendly 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
Retailer 14
Retailer 15
Retailer 16
October 31, 2026
Retailer 2£93 GBP
Retailer 5£108 GBP
Retailer 11£123 GBP
Retailer 4£134 GBP
Retailer 9£168 GBP
Retailer 15£177 GBP
Retailer 6£177 GBP
Retailer 14£190 GBP
Retailer 10£192 GBP
Retailer 16£222 GBP
Retailer 3£238 GBP
Retailer 12£294 GBP
Retailer 13£372 GBP
Friendly Diamonds£393 GBP
Retailer 7£460 GBP
Retailer 8£560 GBP

4 data points across 16 retailers

12 retailers£93 GBP to £393 GBP

A
Cheapest Retailer
-
£93 GBP
$125 USD
A
Retailer 2
-
£108 GBP
$145 USD
View
A
Retailer 3
-
£123 GBP
$165 USD
View
A
Retailer 4
-
£134 GBP
HK$1,400 HKD
View
A
Retailer 5
-
£168 GBP
View
A
Retailer 6
-
£177 GBP
$237 USD
View
A
Retailer 7
-
£192 GBP
View
B+
Retailer 8
-
£222 GBP
$297 USD
View
B+
Retailer 9
-
£238 GBP
View
B+
Retailer 10
-
£294 GBP
$394 USD
View
B
Retailer 11
-
£372 GBP
$498 USD
View
Most Expensive
B
Friendly Diamonds
6558455 · Oct 31
£393 GBP
$526 USD
View
11 more retailers have this diamond
Prices start from £93 GBPSave up to £299 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
0.81ct Radiant
£93 GBP