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Round|Lab Grown|IGI

3.06ct G SI2 Round Lab Grown Diamond

ID • G/SI2 • IGI LG450028901

Shape and cutting style on the report: Round brilliant

Certificate IGI LG450028901

Diamond specifications and retailer prices

From £588 GBP
As of November 4, 2026
Save £856 GBP (59%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,165 GBP at B2C Jewels · As of October 26, 2026
View at B2C Jewels

About this 3.06ct lab-grown round diamond

This 3.06ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG450028901 or 450028901. Listed at 7 retailers as of November 4, 2026, with a 146% 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

3.06
Carat
G
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG450028901
Dimensions9.38 × 9.34 × 5.75 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
Blue Nuance This Laboratory grown diamond was created by high pressure high temperature process (HPHT). Type II
Top View
9.38 mm9.34 mm3.06 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG450028901
Side View
Table 57.0%Crown 34.1°GirdlePavilion 41.2°Culet: NoneDepth 61.4%

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 4
Current: £652 GBP|Low: £516 GBP|High: £2,165 GBP|Avg: £931 GBP|-69.9%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 5£588 GBP
Retailer 3£600 GBP
B2C Jewels£652 GBP
Retailer 6£733 GBP
Retailer 4£1,066 GBP
Retailer 2£1,444 GBP

11 data points across 6 retailers

7 retailers£588 GBP to £1,444 GBP

B+
Cheapest Retailer
-
£588 GBP
A
Retailer 2
-
£600 GBP
View
A
Retailer 3
-
£652 GBP
View
B+
Retailer 4
-
£733 GBP
View
B
Retailer 5
-
£1,066 GBP
View
B
Retailer 6
-
£1,444 GBP
View
Most Expensive
B2C Jewels
21587169 · Oct 26
£2,165 GBP
$2,914 USD
View
Price last confirmed 10 days ago
6 more retailers have this diamond
Prices start from £588 GBPSave up to £856 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
3.06ct Round
£588 GBP