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Round|Lab Grown|IGI

3.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG784661357

Shape and cutting style on the report: Round brilliant

Certificate IGI LG784661357

Diamond specifications and retailer prices

From £525 GBP
As of November 4, 2026
Save £783 GBP (60%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,308 GBP at Rare Carat · As of November 4, 2026
View at Rare Carat

About this 3.09ct lab-grown round diamond

This 3.09ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG784661357 or 784661357. Listed at 7 retailers as of November 4, 2026, with prices from £525 to £1,308, a £783 spread on the same certified stone. Rare Carat lists it at £1,308. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784661357
Dimensions9.43 × 9.36 × 5.72 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.43 mm9.36 mm3.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784661357
Side View
Table 59.0%Crown 33.2°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.0%

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 4
Current: £1,308 GBP|Low: £506 GBP|High: £1,371 GBP|Avg: £878 GBP|-4.6%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4£525 GBP
Retailer 2£580 GBP
Retailer 5£618 GBP
Retailer 6£713 GBP
Retailer 7£1,080 GBP
Retailer 3£1,273 GBP
Rare Carat£1,308 GBP

40 data points across 7 retailers

7 retailers£525 GBP to £1,308 GBP

B+
Cheapest Retailer
-
£525 GBP
A
Retailer 2
-
£580 GBP
View
A
Retailer 3
-
£618 GBP
View
A
Retailer 4
-
£713 GBP
View
B
Retailer 5
-
£1,080 GBP
View
B
Retailer 6
-
£1,273 GBP
View
Most Expensive
B
Rare Carat
DM1-19_l_784661357 · Nov 4
£1,308 GBP
$1,760 USD
View
6 more retailers have this diamond
Prices start from £525 GBPSave up to £783 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
£525 GBP