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3.74ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG629408523

Shape and cutting style on the report: Round brilliant

Certificate IGI LG629408523

Diamond specifications and retailer prices

From £995 GBP
CA$1,854 CAD
As of November 2, 2026
Save £321 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,315 GBP at The Diamond Guys · As of November 1, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG629408523 or 629408523. Listed at 2 retailers as of November 1, 2026, with prices from £995 to £1,315, a £321 spread on the same certified stone. The Diamond Guys lists it at £1,315. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629408523
Dimensions9.92 × 9.87 × 6.17 mm
L/W Ratio1.01
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
9.92 mm9.87 mm3.74 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629408523
Side View
Table 56.0%Crown 34.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.3%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: £1,636 GBP|Low: £198 GBP|High: £2,437 GBP|Avg: £952 GBP|-4.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
The Diamond Guys
August 3, 2026
Retailer 3£547 GBP
Retailer 5£585 GBP
Retailer 9£657 GBP
Retailer 11£666 GBP
Retailer 6£788 GBP
Retailer 8£804 GBP
Retailer 4£825 GBP
Retailer 7£995 GBP
Retailer 2£1,293 GBP
The Diamond Guys£1,315 GBP
Retailer 1£1,636 GBP
Retailer 10£2,049 GBP

58 data points across 12 retailers

2 retailers£995 GBP to £1,315 GBP

B+
Cheapest Retailer
-
£995 GBP
CA$1,854 CAD
Most Expensive
B
The Diamond Guys
1954434364 · Nov 1
£1,315 GBP
$1,765 USD
View
1 more retailer has this diamond
Prices start from £995 GBPSave up to £321 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+
3.74ct Round
£995 GBP