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Round|Lab Grown|IGI

0.80ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG301781271

Shape and cutting style on the report: Round brilliant

Certificate IGI LG301781271

Diamond specifications and retailer prices

From £235 GBP
€300 EUR
As of October 31, 2026
Save £198 GBP (46%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £433 GBP at Brilliant Earth · As of November 1, 2026
View at Brilliant Earth

About this 0.8ct lab-grown round diamond

This 0.8ct lab-grown round sits in the just-under-one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG301781271 or 301781271. Listed at 2 retailers as of October 31, 2026, with prices from £235 to £433, a £198 spread on the same certified stone. Brilliant Earth lists it at £433. 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

0.80
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG301781271
Dimensions6.05 × 6.02 × 3.59 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANTThis Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa
Top View
6.05 mm6.02 mm0.80 ctF / SI1
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG301781271
Side View
Table 59.5%Crown 33.4°Girdle: THN-MEDPavilion 40.5°Culet: NoneDepth 59.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £433 GBP|Low: £187 GBP|High: £440 GBP|Avg: £287 GBP|-1.7%
Brilliant Earth
Retailer 2
Retailer 3
November 1, 2026
Retailer 3£187 GBP
Retailer 2£235 GBP
Brilliant Earth£433 GBP

11 data points across 3 retailers

2 retailers£235 GBP to £433 GBP

A
Cheapest Retailer
-
£235 GBP
€300 EUR
Most Expensive
B
Brilliant Earth
16335520A · Nov 1
£433 GBP
$580 USD
View
1 more retailer has this diamond
Prices start from £235 GBPSave up to £198 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
0.80ct Round
£235 GBP