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3.78ct F SI2 Round Lab Grown Diamond

ID • F/SI2 • IGI LG620446215

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620446215

Diamond specifications and retailer prices

From $4,680 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: $4,680 USD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620446215 or 620446215. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620446215
Dimensions10.08 × 9.99 × 6.04 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
10.08 mm9.99 mm3.78 ctF / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620446215
Side View
Table 59.0%Crown 33.3°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.3%

Caratlytics Score

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C
Average
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Price History

Last verified: Oct 31
Current: $4,680 USD|Low: $837 USD|High: $4,680 USD|Avg: $2,125 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
May 9, 2026
Retailer 4$837 USD
Retailer 2$996 USD
Retailer 3$1,065 USD
Retailer 5$1,418 USD
Retailer 8$1,480 USD
Retailer 7$1,877 USD
Retailer 6$2,341 USD
Brilliant Earth$4,680 USD

49 data points across 8 retailers

1 retailer

C
Brilliant Earth
9278630Y · Oct 31
$4,680 USD
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C
3.78ct Round
$4,680 USD