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Round|Lab Grown|IGI

3.74ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG644471813

Shape and cutting style on the report: Round brilliant

Certificate IGI LG644471813

Diamond specifications and retailer prices

From £300 GBP
$402 USD
As of October 29, 2026
Save £1,040 GBP (78%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,340 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.74ct lab-grown round diamond

This 3.74ct 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 LG644471813 or 644471813. Listed at 3 retailers as of October 29, 2026, with prices from £300 to £1,340, a £1,040 spread on the same certified stone. The Diamond Guys lists it at £1,340. 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

3.74
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG644471813
Dimensions10.04 × 10.00 × 6.08 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
10.04 mm10.00 mm3.74 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG644471813
Side View
Table 59.0%Crown 34.2°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £300 GBP|Low: £228 GBP|High: £2,291 GBP|Avg: £960 GBP|-4.3%
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
Retailer 14
The Diamond Guys
October 27, 2026
Retailer 1£300 GBP
Retailer 13£355 GBP
Retailer 7£355 GBP
Retailer 10£473 GBP
Retailer 11£546 GBP
Retailer 8£583 GBP
Retailer 9£613 GBP
Retailer 2£849 GBP
Retailer 12£898 GBP
Retailer 14£912 GBP
Retailer 5£1,013 GBP
The Diamond Guys£1,340 GBP
Retailer 3£1,707 GBP
Retailer 6£2,090 GBP
Retailer 4£2,291 GBP

9 data points across 15 retailers

3 retailers£300 GBP to £1,340 GBP

A
Cheapest Retailer
-
£300 GBP
$402 USD
Final sale: no returns
B+
Retailer 2
-
£1,013 GBP
CA$1,884 CAD
View
Most Expensive
B
The Diamond Guys
1954434263 · Oct 30
£1,340 GBP
$1,795 USD
View
2 more retailers have this diamond
Prices start from £300 GBPSave up to £1,040 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
3.74ct Round
£300 GBP