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Round|Lab Grown|IGI

3.10ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG666443721

Shape and cutting style on the report: Round brilliant

Certificate IGI LG666443721

Diamond specifications and retailer prices

From £272 GBP
As of November 5, 2026
Save £1,351 GBP (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,623 GBP at Rare Carat · As of November 4, 2026
View at Rare Carat

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG666443721 or 666443721. Listed at 15 retailers as of November 4, 2026, with prices from £272 to £1,623, a £1,351 spread on the same certified stone. Rare Carat lists it at £1,623. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG666443721
Dimensions9.37 × 9.40 × 5.77 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
9.37 mm9.40 mm3.10 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG666443721
Side View
Table 56.0%Crown 34.6°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.5%

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: £1,623 GBP|Low: £272 GBP|High: £3,398 GBP|Avg: £990 GBP|-11.8%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
November 5, 2026
Retailer 13£272 GBP
Retailer 7£316 GBP
Retailer 6£337 GBP
Retailer 17£371 GBP
Retailer 2£447 GBP
Retailer 14£450 GBP
Retailer 15£538 GBP
Retailer 4£539 GBP
Retailer 16£573 GBP
Retailer 11£601 GBP
Retailer 3£835 GBP
Retailer 12£990 GBP
Retailer 5£1,085 GBP
Retailer 10£1,314 GBP
Rare Carat£1,623 GBP
Retailer 9£2,630 GBP
Retailer 8£3,398 GBP

10 data points across 17 retailers

15 retailers£272 GBP to £1,623 GBP

A
Cheapest Retailer
-
£272 GBP
A
Retailer 2
-
£316 GBP
View
A
Retailer 3
-
£337 GBP
View
A
Retailer 4
-
£371 GBP
View
A
Retailer 5
-
£447 GBP
View
A
Retailer 6
-
£450 GBP
View
Retailer 7
-
£538 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£539 GBP
View
A
Retailer 9
-
£573 GBP
View
A
Retailer 10
-
£601 GBP
View
B+
Retailer 11
-
£835 GBP
View
B+
Retailer 12
-
£990 GBP
View
B
Retailer 13
-
£1,085 GBP
View
B
Retailer 14
-
£1,314 GBP
View
Most Expensive
B
Rare Carat
KI7214437KF666 · Nov 4
£1,623 GBP
$2,185 USD
View
14 more retailers have this diamond
Prices start from £272 GBPSave up to £1,351 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
£272 GBP