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Radiant|Lab Grown|IGI

1.80ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG577399386

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

Certificate IGI LG577399386

Diamond specifications and retailer prices

From £306 GBP
$411 USD
As of November 1, 2026
Save £715 GBP (70%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,021 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.8ct lab-grown radiant diamond

This 1.8ct lab-grown radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG577399386 or 577399386. Listed at 11 retailers as of November 1, 2026, with prices from £306 to £1,021, a £715 spread on the same certified stone. Brilliant Earth lists it at £1,021. 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

1.80
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG577399386
Dimensions8.76 × 5.92 × 4.04 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
8.76 mm5.92 mm1.80 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG577399386
Side View
Table 66.0%Crown 43.2°Girdle: MediumPavilion 35.1°Culet: NoneDepth 68.2%

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 1
Current: £1,021 GBP|Low: £157 GBP|High: £1,066 GBP|Avg: £483 GBP|-4.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 3£157 GBP
Retailer 11£174 GBP
Retailer 10£306 GBP
Retailer 5£312 GBP
Retailer 2£314 GBP
Retailer 9£431 GBP
Retailer 8£461 GBP
Retailer 6£563 GBP
Retailer 4£816 GBP
Retailer 7£816 GBP
Brilliant Earth£1,021 GBP

38 data points across 11 retailers

11 retailers£306 GBP to £1,021 GBP

Retailer 1
-
£163 GBP
$219 USD
Price last confirmed 36 days ago
Retailer 2
-
£172 GBP
$231 USD
View
Price last confirmed 36 days ago
B+
Retailer 3
-
£306 GBP
$411 USD
View
A
Retailer 4
-
£312 GBP
€399 EUR
View
A
Retailer 5
-
£314 GBP
View
A
Retailer 6
-
£431 GBP
$579 USD
View
A
Retailer 7
-
£461 GBP
$619 USD
View
B+
Retailer 8
-
£563 GBP
$755 USD
View
B+
Retailer 9
-
£816 GBP
View
B
Retailer 10
-
£816 GBP
$1,095 USD
View
Most Expensive
B
Brilliant Earth
7624068A · Nov 2
£1,021 GBP
$1,370 USD
View
10 more retailers have this diamond
Prices start from £306 GBPSave up to £715 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
1.80ct Radiant
£306 GBP