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Radiant|Lab Grown|IGI

5.20ct F SI1 Radiant Lab Grown Diamond

EX • F/SI1 • IGI LG621479819

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

Certificate IGI LG621479819

Diamond specifications and retailer prices

From £835 GBP
$1,120 USD
As of November 2, 2026
Save £1,714 GBP (67%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,549 GBP at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 5.2ct lab-grown radiant diamond

This 5.2ct lab-grown radiant sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG621479819 or 621479819. Listed at 7 retailers as of November 1, 2026, with prices from £835 to £2,549, a £1,714 spread on the same certified stone. Rare Carat lists it at £2,549. 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

5.20
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle33.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG621479819
Dimensions12.82 × 8.54 × 5.51 mm
L/W Ratio1.50
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
12.82 mm8.54 mm5.20 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG621479819
Side View
Table 66.0%Crown 42.8°Girdle: THN-MEDPavilion 33.2°Culet: NoneDepth 64.5%

Caratlytics Score

How it works →
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 2
Current: £893 GBP|Low: £803 GBP|High: £2,507 GBP|Avg: £1,307 GBP|+2.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 3, 2026
Retailer 4£835 GBP
Retailer 3£873 GBP
Retailer 1£893 GBP
Retailer 5£1,035 GBP
Retailer 6£1,841 GBP
Retailer 2£2,474 GBP

41 data points across 6 retailers

7 retailers£835 GBP to £2,549 GBP

A
Cheapest Retailer
-
£835 GBP
$1,120 USD
B+
Retailer 2
-
£873 GBP
$1,171 USD
View
A
Retailer 3
-
£893 GBP
View
B+
Retailer 4
-
£1,035 GBP
$1,389 USD
View
B
Retailer 5
-
£1,841 GBP
$2,471 USD
View
B
Retailer 6
-
£2,474 GBP
View
Most Expensive
B
Rare Carat
DB-111-17_l_621479819 · Nov 1
£2,549 GBP
$3,420 USD
View
6 more retailers have this diamond
Prices start from £835 GBPSave up to £1,714 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
5.20ct Radiant
£835 GBP