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Marquise|Lab Grown|IGI

3.71ct F SI1 Marquise Lab Grown Diamond

EX • F/SI1 • IGI LG641486225

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG641486225

Diamond specifications and retailer prices

From $3,727 USD
As of October 30, 2026
1 retailer carries this diamond
Only listing: $3,727 USD at Taylor and Hart
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 Taylor and Hart

About this 3.71ct lab-grown marquise diamond

This 3.71ct lab-grown marquise 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 LG641486225 or 641486225. Listed at a single retailer as of October 30, 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

3.71
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG641486225
Dimensions16.75 × 7.84 × 4.89 mm
L/W Ratio2.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.75 mm7.84 mm3.71 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG641486225
Side View
Table 61.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: $1,116 USD|Low: $865 USD|High: $3,727 USD|Avg: $1,371 USD|-8.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Taylor and Hart
October 30, 2026
Retailer 4$865 USD
Retailer 5$883 USD
Retailer 3$1,000 USD
Retailer 1$1,116 USD
Retailer 2$1,475 USD
Taylor and Hart$3,727 USD

63 data points across 6 retailers

1 retailer

B
Taylor and Hart
8A2RJBF · Oct 30
$3,727 USD
View

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
3.71ct Marquise
$3,727 USD