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3.10ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG629431039

Shape and cutting style on the report: Round brilliant

Certificate IGI LG629431039

Diamond specifications and retailer prices

From £924 GBP
CA$1,719 CAD
As of October 30, 2026
Save £298 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,222 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.1ct lab-grown round diamond

This 3.1ct 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 LG629431039 or 629431039. Listed at 2 retailers as of October 30, 2026, with prices from £924 to £1,222, a £298 spread on the same certified stone. The Diamond Guys lists it at £1,222. 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629431039
Dimensions9.22 × 9.16 × 5.82 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.22 mm9.16 mm3.10 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629431039
Side View
Table 56.0%Crown 36.3°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.3%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: £403 GBP|Low: £185 GBP|High: £2,246 GBP|Avg: £1,031 GBP|-38.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
The Diamond Guys
August 9, 2026
Retailer 9£191 GBP
Retailer 1£403 GBP
Retailer 8£409 GBP
Retailer 5£500 GBP
Retailer 12£572 GBP
Retailer 2£613 GBP
Retailer 7£744 GBP
Retailer 10£784 GBP
Retailer 6£808 GBP
Retailer 13£924 GBP
The Diamond Guys£1,222 GBP
Retailer 4£1,403 GBP
Retailer 11£1,672 GBP
Retailer 3£1,918 GBP

63 data points across 14 retailers

2 retailers£924 GBP to £1,222 GBP

B+
Cheapest Retailer
-
£924 GBP
CA$1,719 CAD
Most Expensive
B
The Diamond Guys
1954434480 · Oct 30
£1,222 GBP
$1,637 USD
View
1 more retailer has this diamond
Prices start from £924 GBPSave up to £298 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.

B+
3.10ct Round
£924 GBP