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Round|Lab Grown|IGI

3.71ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG631454051

Shape and cutting style on the report: Round brilliant

Certificate IGI LG631454051

Diamond specifications and retailer prices

From €1,165 EUR
CA$1,807 CAD
As of October 30, 2026
Save €376 EUR (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €1,540 EUR at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 3.71ct lab-grown round diamond

This 3.71ct 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 LG631454051 or 631454051. Listed at 2 retailers as of October 30, 2026, with prices from €1,165 to €1,540, a €376 spread on the same certified stone. The Diamond Guys lists it at €1,540. 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

3.71
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG631454051
Dimensions9.99 × 9.91 × 6.11 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
9.99 mm9.91 mm3.71 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG631454051
Side View
Table 56.0%Crown 34.1°Girdle: MediumPavilion 40.8°Culet: NoneDepth 61.4%

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: €379 EUR|Low: €266 EUR|High: €4,529 EUR|Avg: €1,362 EUR|+42.4%
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
September 25, 2026
Retailer 1€379 EUR
Retailer 10€425 EUR
Retailer 7€637 EUR
Retailer 5€692 EUR
Retailer 6€711 EUR
Retailer 11€971 EUR
Retailer 9€1,076 EUR
Retailer 2€1,165 EUR
Retailer 8€1,238 EUR
The Diamond Guys€1,540 EUR
Retailer 12€1,967 EUR
Retailer 4€2,408 EUR
Retailer 3€4,529 EUR

4 data points across 13 retailers

2 retailers€1,165 EUR to €1,540 EUR

B+
Cheapest Retailer
-
€1,165 EUR
CA$1,807 CAD
Most Expensive
B
The Diamond Guys
1954434367 · Nov 1
€1,540 EUR
$1,721 USD
View
1 more retailer has this diamond
Prices start from €1,165 EURSave up to €376 EUR

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+
3.71ct Round
€1,165 EUR