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Round|Lab Grown|IGI

1.80ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG651482936

Shape and cutting style on the report: Round brilliant

Certificate IGI LG651482936

Diamond specifications and retailer prices

From £163 GBP
$218 USD
As of November 1, 2026
Save £845 GBP (84%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,008 GBP at Brilliant Earth · As of November 1, 2026
View at Brilliant Earth

About this 1.8ct lab-grown round diamond

This 1.8ct lab-grown round 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 LG651482936 or 651482936. Listed at 15 retailers as of November 1, 2026, with prices from £163 to £1,008, a £845 spread on the same certified stone. Brilliant Earth lists it at £1,008. 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 angle35.1°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG651482936
Dimensions7.80 × 7.74 × 4.80 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.80 mm7.74 mm1.80 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG651482936
Side View
Table 59.0%Crown 35.1°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £1,008 GBP|Low: £157 GBP|High: £1,008 GBP|Avg: £379 GBP
Brilliant Earth
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
November 2, 2026
Retailer 8£163 GBP
Retailer 7£182 GBP
Retailer 14£189 GBP
Retailer 9£202 GBP
Retailer 5£204 GBP
Retailer 3£338 GBP
Retailer 15£346 GBP
Retailer 2£371 GBP
Retailer 13£400 GBP
Retailer 12£431 GBP
Retailer 10£649 GBP
Retailer 11£652 GBP
Retailer 6£679 GBP
Retailer 4£821 GBP
Brilliant Earth£1,008 GBP

41 data points across 15 retailers

15 retailers£163 GBP to £1,008 GBP

A
Cheapest Retailer
-
£163 GBP
$218 USD
A
Retailer 2
-
£182 GBP
$244 USD
View
Final sale: no returns
A
Retailer 3
-
£189 GBP
$253 USD
View
A
Retailer 4
-
£202 GBP
$271 USD
View
Retailer 5
-
£204 GBP
$274 USD
View
Price last confirmed 8 days ago
A
Retailer 6
-
£338 GBP
€431 EUR
View
B+
Retailer 7
-
£346 GBP
$464 USD
View
A
Retailer 8
-
£371 GBP
View
A
Retailer 9
-
£400 GBP
$536 USD
View
A
Retailer 10
-
£431 GBP
$577 USD
View
B+
Retailer 11
-
£649 GBP
$870 USD
View
B+
Retailer 12
-
£652 GBP
$873 USD
View
B
Retailer 13
-
£679 GBP
$910 USD
View
B
Retailer 14
-
£821 GBP
View
Most Expensive
B
Brilliant Earth
11867105A · Nov 1
£1,008 GBP
$1,350 USD
View
14 more retailers have this diamond
Prices start from £163 GBPSave up to £845 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 Round
£163 GBP