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Radiant|Lab Grown|IGI

3.10ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1 • IGI LG671423270

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG671423270

Diamond specifications and retailer prices

From £1,006 GBP
As of October 29, 2026
2 retailers carry this diamond
Most expensive: £2,622 GBP at Rare Carat
View at Rare Carat

About this 3.1ct lab-grown radiant diamond

This 3.1ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG671423270 or 671423270. Listed at 2 retailers as of October 29, 2026. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.3°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG671423270
Dimensions10.41 × 7.19 × 4.72 mm
L/W Ratio1.45
Culet sizePointed
Top View
10.41 mm7.19 mm3.10 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG671423270
Side View
Table 65.0%Crown 43.3°Girdle: MediumPavilion 34.6°Culet: NoneDepth 65.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 29
Current: £560 GBP|Low: £202 GBP|High: £1,848 GBP|Avg: £701 GBP|-20.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
June 15, 2026
Retailer 8£481 GBP
Retailer 7£495 GBP
Retailer 1£560 GBP
Retailer 6£608 GBP
Retailer 4£645 GBP
Retailer 5£677 GBP
Retailer 3£785 GBP
Retailer 2£1,085 GBP

70 data points across 8 retailers

2 retailers

B+
Cheapest Retailer
-
£1,006 GBP
Most Expensive
Rare Carat
671423270
£2,622 GBP
$3,513 USD
View
1 more retailer has this diamond
Prices start from £1,006 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 Radiant
£1,006 GBP