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Round|Lab Grown|IGI

3.10ct D SI2 Round Lab Grown Diamond

ID • D/SI2 • IGI LG691590668

Shape and cutting style on the report: Round brilliant

Certificate IGI LG691590668

Diamond specifications and retailer prices

From £313 GBP
As of November 5, 2026
Save £1,708 GBP (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,021 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 3.1ct lab-grown round diamond

This 3.1ct lab-grown round sits in the three to five carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG691590668 or 691590668. Listed at 15 retailers as of November 5, 2026, with prices from £313 to £2,021, a £1,708 spread on the same certified stone. Brilliant Earth lists it at £2,021. 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

3.10
Carat
D
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG691590668
Dimensions9.40 × 9.36 × 5.75 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
9.40 mm9.36 mm3.10 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG691590668
Side View
Table 58.0%Crown 33.4°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £2,021 GBP|Low: £300 GBP|High: £2,890 GBP|Avg: £833 GBP|-30.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 8£313 GBP
Retailer 3£388 GBP
Retailer 9£388 GBP
Retailer 10£520 GBP
Retailer 6£618 GBP
Retailer 4£631 GBP
Retailer 11£669 GBP
Retailer 7£912 GBP
Retailer 5£1,088 GBP
Retailer 2£1,421 GBP
Brilliant Earth£2,021 GBP

44 data points across 11 retailers

15 retailers£313 GBP to £2,021 GBP

A
Cheapest Retailer
-
£313 GBP
A
Retailer 2
-
£351 GBP
View
Retailer 3
-
£388 GBP
View
Price last confirmed 12 days ago
A
Retailer 4
-
£388 GBP
View
B+
Retailer 5
-
£520 GBP
View
A
Retailer 6
-
£618 GBP
View
A
Retailer 7
-
£631 GBP
View
A
Retailer 8
-
£669 GBP
View
B+
Retailer 9
-
£838 GBP
View
B+
Retailer 10
-
£912 GBP
View
B+
Retailer 11
-
£942 GBP
View
B
Retailer 12
-
£1,088 GBP
View
B
Retailer 13
-
£1,247 GBP
View
B
Retailer 14
-
£1,421 GBP
View
Most Expensive
B
Brilliant Earth
13678752A · Nov 5
£2,021 GBP
$2,720 USD
View
14 more retailers have this diamond
Prices start from £313 GBPSave up to £1,708 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
3.10ct Round
£313 GBP