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Round|Lab Grown|IGI

3.11ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG792619889

Shape and cutting style on the report: Round brilliant

Certificate IGI LG792619889

Diamond specifications and retailer prices

From £319 GBP
$427 USD
As of October 29, 2026
Save £1,264 GBP (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,582 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 3.11ct lab-grown round diamond

This 3.11ct lab-grown round sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG792619889 or 792619889. Listed at 17 retailers as of October 28, 2026, with prices from £319 to £1,582, a £1,264 spread on the same certified stone. Brilliant Earth lists it at £1,582. 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

3.11
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792619889
Dimensions9.39 × 9.43 × 5.73 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.39 mm9.43 mm3.11 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG792619889
Side View
Table 58.0%Crown 34.5°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.9%

Caratlytics Score

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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: Oct 29
Current: £1,582 GBP|Low: £319 GBP|High: £1,627 GBP|Avg: £886 GBP|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 8£319 GBP
Retailer 5£504 GBP
Retailer 10£622 GBP
Retailer 9£623 GBP
Retailer 2£628 GBP
Retailer 3£650 GBP
Retailer 7£949 GBP
Retailer 6£1,343 GBP
Retailer 4£1,460 GBP
Brilliant Earth£1,582 GBP

41 data points across 10 retailers

17 retailers£319 GBP to £1,582 GBP

A
Cheapest Retailer
-
£319 GBP
$427 USD
A
Retailer 2
-
£357 GBP
$478 USD
View
A
Retailer 3
-
£396 GBP
$530 USD
View
A
Retailer 4
-
£396 GBP
$530 USD
View
A
Retailer 5
-
£504 GBP
$675 USD
View
A
Retailer 6
-
£622 GBP
$833 USD
View
B+
Retailer 7
-
£623 GBP
$835 USD
View
A
Retailer 8
-
£628 GBP
€802 EUR
View
A
Retailer 9
-
£650 GBP
View
B+
Retailer 10
-
£778 GBP
$1,043 USD
View
B
Retailer 11
-
£949 GBP
$1,272 USD
View
Retailer 12
-
£1,019 GBP
$1,366 USD
View
Price last confirmed 45 days ago
B
Retailer 13
-
£1,270 GBP
$1,702 USD
View
B
Retailer 14
-
£1,295 GBP
$1,735 USD
View
Retailer 15
-
£1,343 GBP
$1,800 USD
View
Price last confirmed 13 days ago
B
Retailer 16
-
£1,460 GBP
View
Most Expensive
B
Brilliant Earth
18909503A · Oct 28
£1,582 GBP
$2,120 USD
View
16 more retailers have this diamond
Prices start from £319 GBPSave up to £1,264 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
3.11ct Round
£319 GBP