CaratHunter
Plans
Round|Lab Grown|IGI

8.54ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG812628788

Shape and cutting style on the report: Round brilliant

Certificate IGI LG812628788

Diamond specifications and retailer prices

From £1,579 GBP
$2,119 USD
As of November 2, 2026
Save £2,619 GBP (62%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £4,493 GBP at Brilliant Earth · As of October 6, 2026
View at Brilliant Earth

About this 8.54ct lab-grown round diamond

This 8.54ct lab-grown round 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 LG812628788 or 812628788. Listed at 9 retailers as of October 31, 2026, with a 166% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

8.54
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812628788
Dimensions13.24 × 13.27 × 8.00 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.24 mm13.27 mm8.54 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812628788
Side View
Table 55.0%Crown 33.2°Girdle: MediumPavilion 40.3°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £4,493 GBP|Low: £1,472 GBP|High: £4,628 GBP|Avg: £2,768 GBP|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6£1,579 GBP
Retailer 2£1,678 GBP
Retailer 9£1,815 GBP
Retailer 7£1,886 GBP
Retailer 10£1,927 GBP
Retailer 5£2,909 GBP
Retailer 3£3,410 GBP
Retailer 4£3,897 GBP
Retailer 8£4,199 GBP
Brilliant Earth£4,493 GBP

40 data points across 10 retailers

9 retailers£1,579 GBP to £4,199 GBP

B+
Cheapest Retailer
-
£1,579 GBP
$2,119 USD
B+
Retailer 2
-
£1,678 GBP
View
B+
Retailer 3
-
£1,886 GBP
$2,531 USD
View
Retailer 4
-
£1,927 GBP
$2,586 USD
View
Price last confirmed 26 days ago
B
Retailer 5
-
£2,909 GBP
$3,904 USD
View
B
Retailer 6
-
£3,410 GBP
View
B
Retailer 7
-
£3,897 GBP
$5,230 USD
View
B
Retailer 8
-
£4,199 GBP
$5,634 USD
View
Most Expensive
Brilliant Earth
20729502A · Oct 6
£4,493 GBP
$6,030 USD
View
Price last confirmed 27 days ago
8 more retailers have this diamond
Prices start from £1,579 GBPSave up to £2,619 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.

B+
8.54ct Round
£1,579 GBP