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Round|Lab Grown|IGI

3.10ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG789606952

Shape and cutting style on the report: Round brilliant

Certificate IGI LG789606952

Diamond specifications and retailer prices

From £299 GBP
As of November 5, 2026
Save £1,871 GBP (86%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,170 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG789606952 or 789606952. Listed at 11 retailers as of November 5, 2026, with prices from £299 to £2,170, a £1,871 spread on the same certified stone. Brilliant Earth lists it at £2,170. 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 angle32.6°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG789606952
Dimensions9.51 × 9.47 × 5.61 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
9.51 mm9.47 mm3.10 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG789606952
Side View
Table 61.0%Crown 32.6°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 59.1%

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: £2,170 GBP|Low: £285 GBP|High: £3,685 GBP|Avg: £1,146 GBP|-41.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 5, 2026
Retailer 10£299 GBP
Retailer 8£335 GBP
Retailer 2£492 GBP
Retailer 11£567 GBP
Retailer 4£607 GBP
Retailer 3£638 GBP
Retailer 13£991 GBP
Retailer 12£992 GBP
Retailer 7£1,192 GBP
Retailer 5£1,223 GBP
Retailer 6£1,258 GBP
Retailer 14£1,430 GBP
Retailer 9£1,444 GBP
Brilliant Earth£2,170 GBP

31 data points across 14 retailers

11 retailers£299 GBP to £2,170 GBP

A
Cheapest Retailer
-
£299 GBP
A
Retailer 2
-
£335 GBP
View
A
Retailer 3
-
£492 GBP
View
Retailer 4
-
£567 GBP
View
Price last confirmed 8 days ago
A
Retailer 5
-
£638 GBP
View
B+
Retailer 6
-
£991 GBP
View
B
Retailer 7
-
£992 GBP
View
B+
Retailer 8
-
£1,192 GBP
View
Retailer 9
-
£1,430 GBP
View
Price last confirmed 24 days ago
B
Retailer 10
-
£1,444 GBP
View
Most Expensive
B
Brilliant Earth
20805177A · Nov 5
£2,170 GBP
$2,920 USD
View
10 more retailers have this diamond
Prices start from £299 GBPSave up to £1,871 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
£299 GBP