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Round|Lab Grown|IGI

3.05ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG625472864

Shape and cutting style on the report: Round brilliant

Certificate IGI LG625472864

Diamond specifications and retailer prices

From £904 GBP
As of November 5, 2026
Save £292 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,196 GBP at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

About this 3.05ct lab-grown round diamond

This 3.05ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG625472864 or 625472864. Listed at 2 retailers as of November 5, 2026, with prices from £904 to £1,196, a £292 spread on the same certified stone. The Diamond Guys lists it at £1,196. 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

3.05
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG625472864
Dimensions9.22 × 9.18 × 5.78 mm
L/W Ratio1.00
Girdle conditionFaceted
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
9.22 mm9.18 mm3.05 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG625472864
Side View
Table 56.0%Crown 36.5°Girdle: MediumPavilion 40.7°Culet: NoneDepth 62.8%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 5
Current: £1,384 GBP|Low: £179 GBP|High: £3,091 GBP|Avg: £887 GBP|-7.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
The Diamond Guys
August 3, 2026
Retailer 5£451 GBP
Retailer 4£485 GBP
Retailer 8£554 GBP
Retailer 2£606 GBP
Retailer 12£609 GBP
Retailer 9£640 GBP
Retailer 11£749 GBP
Retailer 6£793 GBP
Retailer 10£904 GBP
The Diamond Guys£1,196 GBP
Retailer 1£1,384 GBP
Retailer 7£1,857 GBP
Retailer 13£1,909 GBP
Retailer 3£1,984 GBP

66 data points across 14 retailers

2 retailers£904 GBP to £1,196 GBP

B+
Cheapest Retailer
-
£904 GBP
Most Expensive
B
The Diamond Guys
1954434425 · Nov 6
£1,196 GBP
$1,610 USD
View
1 more retailer has this diamond
Prices start from £904 GBPSave up to £292 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+
3.05ct Round
£904 GBP