CaratHunter
Plans
Round|Lab Grown|IGI

3.09ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG680586853

Shape and cutting style on the report: Round brilliant

Certificate IGI LG680586853

Diamond specifications and retailer prices

From £254 GBP
As of November 5, 2026
Save £1,065 GBP (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,319 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 LG680586853 or 680586853. Listed at 15 retailers as of November 4, 2026, with prices from £254 to £1,319, a £1,065 spread on the same certified stone. Rare Carat lists it at £1,319. 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 angle34.2°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG680586853
Dimensions9.37 × 9.43 × 5.74 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
9.37 mm9.43 mm3.09 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG680586853
Side View
Table 57.0%Crown 34.2°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.1%

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: £1,319 GBP|Low: £254 GBP|High: £3,159 GBP|Avg: £813 GBP|-23.0%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 5, 2026
Retailer 12£254 GBP
Retailer 7£295 GBP
Retailer 6£315 GBP
Retailer 16£351 GBP
Retailer 2£418 GBP
Retailer 13£427 GBP
Retailer 14£506 GBP
Retailer 4£508 GBP
Retailer 15£552 GBP
Retailer 10£559 GBP
Retailer 3£709 GBP
Retailer 11£924 GBP
Retailer 5£1,013 GBP
Retailer 9£1,259 GBP
Rare Carat£1,319 GBP
Retailer 8£3,159 GBP

10 data points across 16 retailers

15 retailers£254 GBP to £1,319 GBP

A
Cheapest Retailer
-
£254 GBP
A
Retailer 2
-
£295 GBP
View
A
Retailer 3
-
£315 GBP
View
A
Retailer 4
-
£351 GBP
View
A
Retailer 5
-
£418 GBP
View
A
Retailer 6
-
£427 GBP
View
Retailer 7
-
£506 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£508 GBP
View
A
Retailer 9
-
£552 GBP
View
A
Retailer 10
-
£559 GBP
View
A
Retailer 11
-
£709 GBP
View
B+
Retailer 12
-
£924 GBP
View
B+
Retailer 13
-
£1,013 GBP
View
B
Retailer 14
-
£1,259 GBP
View
Most Expensive
B
Rare Carat
KI8535868KF680 · Nov 4
£1,319 GBP
$1,775 USD
View
14 more retailers have this diamond
Prices start from £254 GBPSave up to £1,065 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
£254 GBP