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3.90ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG690527176

Shape and cutting style on the report: Round brilliant

Certificate IGI LG690527176

Diamond specifications and retailer prices

From £1,127 GBP
CA$2,097 CAD
As of October 30, 2026
Save £363 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,490 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.9ct lab-grown round diamond

This 3.9ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG690527176 or 690527176. Listed at 2 retailers as of October 30, 2026, with prices from £1,127 to £1,490, a £363 spread on the same certified stone. The Diamond Guys lists it at £1,490. 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

3.90
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG690527176
Dimensions10.03 × 9.98 × 6.30 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
10.03 mm9.98 mm3.90 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG690527176
Side View
Table 55.0%Crown 35.9°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 63.0%

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: £4,053 GBP|Low: £222 GBP|High: £4,053 GBP|Avg: £1,188 GBP|+66.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
The Diamond Guys
August 3, 2026
Retailer 4£597 GBP
Retailer 8£660 GBP
Retailer 11£708 GBP
Retailer 2£743 GBP
Retailer 10£866 GBP
Retailer 7£870 GBP
Retailer 6£904 GBP
Retailer 9£1,127 GBP
Retailer 3£1,452 GBP
The Diamond Guys£1,490 GBP
Retailer 5£1,782 GBP
Retailer 12£2,306 GBP
Retailer 1£4,053 GBP

60 data points across 13 retailers

2 retailers£1,127 GBP to £1,490 GBP

B+
Cheapest Retailer
-
£1,127 GBP
CA$2,097 CAD
Most Expensive
B
The Diamond Guys
1954434256 · Oct 30
£1,490 GBP
$1,997 USD
View
1 more retailer has this diamond
Prices start from £1,127 GBPSave up to £363 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+
3.90ct Round
£1,127 GBP