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Round|Lab Grown|IGI

3.70ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG645453866

Shape and cutting style on the report: Round brilliant

Certificate IGI LG645453866

Diamond specifications and retailer prices

From $1,298 USD
CA$1,803 CAD
As of October 30, 2026
Save $419 USD (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,717 USD at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.7ct lab-grown round diamond

This 3.7ct 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 LG645453866 or 645453866. Listed at 2 retailers as of October 30, 2026, with prices from $1,298 to $1,717, a $419 spread on the same certified stone. The Diamond Guys lists it at $1,717. 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

3.70
Carat
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG645453866
Dimensions10.04 × 9.98 × 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 Type IIa
Top View
10.04 mm9.98 mm3.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG645453866
Side View
Table 58.0%Crown 34.1°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.4%

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: $1,090 USD|Low: $259 USD|High: $5,040 USD|Avg: $1,505 USD|-6.9%
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$708 USD
Retailer 5$768 USD
Retailer 10$866 USD
Retailer 12$872 USD
Retailer 6$1,037 USD
Retailer 9$1,051 USD
Retailer 1$1,090 USD
Retailer 7$1,298 USD
Retailer 2$1,665 USD
The Diamond Guys$1,717 USD
Retailer 3$2,230 USD
Retailer 11$2,680 USD
Retailer 8$5,040 USD

58 data points across 13 retailers

2 retailers$1,298 USD to $1,717 USD

B+
Cheapest Retailer
-
$1,298 USD
CA$1,803 CAD
Most Expensive
B
The Diamond Guys
1954434371 · Oct 30
$1,717 USD
View
1 more retailer has this diamond
Prices start from $1,298 USDSave up to $419 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+
3.70ct Round
$1,298 USD