CaratHunter
Plans
Round|Lab Grown|IGI

3.09ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG483197020

Shape and cutting style on the report: Round brilliant

Certificate IGI LG483197020

Diamond specifications and retailer prices

From £1,285 GBP
As of November 5, 2026
Save £9,617 GBP (88%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £10,902 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 3.09ct lab-grown round diamond

This 3.09ct lab-grown round sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG483197020 or 483197020. Listed at 11 retailers as of November 5, 2026, with prices from £1,285 to £10,902, a £9,617 spread on the same certified stone. MOH London lists it at £10,902. 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

3.09
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG483197020
Dimensions9.36 × 9.34 × 5.63 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
9.36 mm9.34 mm3.09 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG483197020
Side View
Table 60.5%Crown 35.1°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 60.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £10,902 GBP|Low: £1,285 GBP|High: £11,078 GBP|Avg: £5,974 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 2£1,285 GBP
Retailer 4£4,714 GBP
Retailer 6£5,280 GBP
Retailer 7£5,454 GBP
Retailer 8£5,647 GBP
Retailer 5£6,341 GBP
Retailer 3£6,502 GBP
MOH London£10,902 GBP

17 data points across 8 retailers

11 retailers£1,285 GBP to £10,902 GBP

A
Cheapest Retailer
-
£1,285 GBP
B
Retailer 2
-
£4,714 GBP
View
B
Retailer 3
-
£4,902 GBP
View
B
Retailer 4
-
£5,280 GBP
View
Final sale: no returns
B
Retailer 5
-
£5,454 GBP
View
B
Retailer 6
-
£5,468 GBP
View
Retailer 7
-
£5,468 GBP
View
Price last confirmed 25 days ago
B
Retailer 8
-
£6,341 GBP
View
B
Retailer 9
-
£6,492 GBP
View
B
Retailer 10
-
£6,502 GBP
View
Most Expensive
B
MOH London
LG483197020 · Nov 5
£10,902 GBP
View
10 more retailers have this diamond
Prices start from £1,285 GBPSave up to £9,617 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
3.09ct Round
£1,285 GBP