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Round|Lab Grown|IGI

3.81ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG634488326

Shape and cutting style on the report: Round brilliant

Certificate IGI LG634488326

Diamond specifications and retailer prices

From $1,337 USD
CA$1,856 CAD
As of October 30, 2026
Save $431 USD (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,768 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 LG634488326 or 634488326. Listed at 2 retailers as of October 30, 2026, with prices from $1,337 to $1,768, a $431 spread on the same certified stone. The Diamond Guys lists it at $1,768. 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 LG634488326
Dimensions10.09 × 10.02 × 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
10.09 mm10.02 mm3.81 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG634488326
Side View
Table 59.0%Crown 34°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.8%

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: $1,104 USD|Low: $266 USD|High: $3,920 USD|Avg: $1,408 USD|-9.1%
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
August 3, 2026
Retailer 4$726 USD
Retailer 6$782 USD
Retailer 9$884 USD
Retailer 11$894 USD
Retailer 8$1,080 USD
Retailer 5$1,095 USD
Retailer 1$1,104 USD
Retailer 7$1,337 USD
Retailer 3$1,735 USD
The Diamond Guys$1,768 USD
Retailer 12$2,360 USD
Retailer 10$2,760 USD
Retailer 2$3,320 USD

60 data points across 13 retailers

2 retailers$1,337 USD to $1,768 USD

B+
Cheapest Retailer
-
$1,337 USD
CA$1,856 CAD
Most Expensive
B
The Diamond Guys
1954434349 · Nov 1
$1,768 USD
View
1 more retailer has this diamond
Prices start from $1,337 USDSave up to $431 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
$1,337 USD