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Round|Lab Grown|IGI

3.78ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG620425009

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620425009

Diamond specifications and retailer prices

From $1,884 CAD
As of October 30, 2026
Save $608 CAD (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $2,492 CAD at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 3.78ct lab-grown round diamond

This 3.78ct 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 LG620425009 or 620425009. Listed at 2 retailers as of October 30, 2026, with prices from $1,884 to $2,492, a $608 spread on the same certified stone. The Diamond Guys lists it at $2,492. 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

3.78
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620425009
Dimensions10.14 × 10.09 × 6.10 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
10.14 mm10.09 mm3.78 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620425009
Side View
Table 58.0%Crown 34.1°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.3%

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: $1,558 CAD|Low: $374 CAD|High: $4,540 CAD|Avg: $1,653 CAD|-8.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
The Diamond Guys
August 3, 2026
Retailer 2$1,019 CAD
Retailer 4$1,108 CAD
Retailer 7$1,240 CAD
Retailer 9$1,259 CAD
Retailer 6$1,458 CAD
Retailer 3$1,509 CAD
Retailer 1$1,558 CAD
Retailer 5$1,884 CAD
Retailer 10$2,445 CAD
The Diamond Guys$2,492 CAD
Retailer 8$3,883 CAD

59 data points across 11 retailers

2 retailers$1,884 CAD to $2,492 CAD

B+
Cheapest Retailer
-
$1,884 CAD
Most Expensive
B
The Diamond Guys
1954434357 · Nov 1
$2,492 CAD
$1,784 USD
View
1 more retailer has this diamond
Prices start from $1,884 CADSave up to $608 CAD

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+
3.78ct Round
$1,884 CAD