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Round|Lab Grown|IGI

2.09ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG778667403

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778667403

Diamond specifications and retailer prices

From £206 GBP
As of November 5, 2026
Save £946 GBP (82%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,152 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 2.09ct lab-grown round diamond

This 2.09ct lab-grown round sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778667403 or 778667403. Listed at 16 retailers as of November 5, 2026, with prices from £206 to £1,152, a £946 spread on the same certified stone. Brilliant Earth lists it at £1,152. 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

2.09
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778667403
Dimensions8.28 × 8.23 × 4.98 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
8.28 mm8.23 mm2.09 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778667403
Side View
Table 59.0%Crown 33.5°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £1,152 GBP|Low: £201 GBP|High: £1,219 GBP|Avg: £548 GBP|-5.5%
Brilliant Earth
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
Retailer 17
November 6, 2026
Retailer 8£206 GBP
Retailer 16£239 GBP
Retailer 5£256 GBP
Retailer 6£256 GBP
Retailer 7£343 GBP
Retailer 3£371 GBP
Retailer 15£371 GBP
Retailer 13£420 GBP
Retailer 2£441 GBP
Retailer 17£487 GBP
Retailer 14£491 GBP
Retailer 4£522 GBP
Retailer 12£660 GBP
Retailer 9£821 GBP
Retailer 11£862 GBP
Retailer 10£1,021 GBP
Brilliant Earth£1,152 GBP

44 data points across 17 retailers

16 retailers£206 GBP to £1,152 GBP

A
Cheapest Retailer
-
£206 GBP
A
Retailer 2
-
£239 GBP
View
A
Retailer 3
-
£256 GBP
View
Retailer 4
-
£256 GBP
View
Price last confirmed 12 days ago
B+
Retailer 5
-
£343 GBP
View
A
Retailer 6
-
£371 GBP
View
A
Retailer 7
-
£420 GBP
View
A
Retailer 8
-
£441 GBP
View
A
Retailer 9
-
£487 GBP
View
A
Retailer 10
-
£491 GBP
View
A
Retailer 11
-
£522 GBP
View
B+
Retailer 12
-
£660 GBP
View
B+
Retailer 13
-
£821 GBP
View
B+
Retailer 14
-
£862 GBP
View
B
Retailer 15
-
£1,021 GBP
View
Most Expensive
B
Brilliant Earth
18492787A · Nov 5
£1,152 GBP
$1,550 USD
View
15 more retailers have this diamond
Prices start from £206 GBPSave up to £946 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
2.09ct Round
£206 GBP