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Marquise|Lab Grown|IGI

3.16ct D SI1 Marquise Lab Grown Diamond

EX • D/SI1 • IGI LG844645197

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG844645197

Diamond specifications and retailer prices

From $488 USD
As of October 31, 2026
Save $4,452 USD (90%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $4,940 USD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 3.16ct lab-grown marquise diamond

This 3.16ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG844645197 or 844645197. Listed at 3 retailers as of October 28, 2026, with prices from $488 to $4,940, a $4,452 spread on the same certified stone. Brilliant Earth lists it at $4,940. 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

3.16
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844645197
Dimensions15.98 × 7.62 × 4.61 mm
L/W Ratio2.10
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.98 mm7.62 mm3.16 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844645197
Side View
Table 61.0%Crown 34.7°Girdle: THN-STKPavilion 40.2°Culet: NoneDepth 60.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $4,940 USD|Low: $488 USD|High: $4,950 USD|Avg: $2,361 USD|-0.2%
Brilliant Earth
Retailer 2
Retailer 3
October 29, 2026
Retailer 3$488 USD
Retailer 2$930 USD
Brilliant Earth$4,940 USD

14 data points across 3 retailers

3 retailers$488 USD to $4,940 USD

A
Cheapest Retailer
-
$488 USD
Final sale: no returns
A
Retailer 2
-
$930 USD
£733 GBP
View
Most Expensive
B
Brilliant Earth
21829797A · Oct 28
$4,940 USD
View
2 more retailers have this diamond
Prices start from $488 USDSave up to $4,452 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.

A
3.16ct Marquise
$488 USD