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Round|Lab Grown|IGI

3.70ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG626427041

Shape and cutting style on the report: Round brilliant

Certificate IGI LG626427041

Diamond specifications and retailer prices

From £952 GBP
CA$1,771 CAD
As of October 30, 2026
Save £307 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,259 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.7ct lab-grown round diamond

This 3.7ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG626427041 or 626427041. Listed at 2 retailers as of October 30, 2026, with prices from £952 to £1,259, a £307 spread on the same certified stone. The Diamond Guys lists it at £1,259. 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

3.70
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG626427041
Dimensions10.08 × 10.04 × 6.04 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
10.08 mm10.04 mm3.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG626427041
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.0%

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: £807 GBP|Low: £193 GBP|High: £2,351 GBP|Avg: £1,029 GBP|-5.7%
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£521 GBP
Retailer 5£567 GBP
Retailer 9£646 GBP
Retailer 11£651 GBP
Retailer 6£773 GBP
Retailer 8£784 GBP
Retailer 1£807 GBP
Retailer 7£952 GBP
Retailer 2£1,239 GBP
The Diamond Guys£1,259 GBP
Retailer 12£1,711 GBP
Retailer 10£2,000 GBP
Retailer 3£2,254 GBP

61 data points across 13 retailers

2 retailers£952 GBP to £1,259 GBP

B+
Cheapest Retailer
-
£952 GBP
CA$1,771 CAD
Most Expensive
B
The Diamond Guys
1954434370 · Oct 30
£1,259 GBP
$1,687 USD
View
1 more retailer has this diamond
Prices start from £952 GBPSave up to £307 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+
3.70ct Round
£952 GBP