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Round|Lab Grown|IGI

3.81ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG646479326

Shape and cutting style on the report: Round brilliant

Certificate IGI LG646479326

Diamond specifications and retailer prices

From $1,360 USD
CA$1,889 CAD
As of October 30, 2026
Save $438 USD (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,798 USD at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 3.81ct lab-grown round diamond

This 3.81ct 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 LG646479326 or 646479326. Listed at 2 retailers as of October 30, 2026, with prices from $1,360 to $1,798, a $438 spread on the same certified stone. The Diamond Guys lists it at $1,798. 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

3.81
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG646479326
Dimensions10.09 × 10.05 × 6.14 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.09 mm10.05 mm3.81 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG646479326
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $1,130 USD|Low: $275 USD|High: $3,330 USD|Avg: $1,295 USD|-8.7%
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$744 USD
Retailer 5$808 USD
Retailer 8$901 USD
Retailer 10$923 USD
Retailer 7$1,068 USD
Retailer 4$1,097 USD
Retailer 1$1,130 USD
Retailer 6$1,360 USD
Retailer 11$1,750 USD
The Diamond Guys$1,798 USD
Retailer 2$2,360 USD
Retailer 9$2,850 USD

60 data points across 12 retailers

2 retailers$1,360 USD to $1,798 USD

B+
Cheapest Retailer
-
$1,360 USD
CA$1,889 CAD
Most Expensive
B
The Diamond Guys
1954434351 · Nov 1
$1,798 USD
View
1 more retailer has this diamond
Prices start from $1,360 USDSave up to $438 USD

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+
3.81ct Round
$1,360 USD