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Marquise|Lab Grown|IGI

3.16ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG846637158

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG846637158

Diamond specifications and retailer prices

From $692 NZD
$390 USD
As of October 31, 2026
Save $5,234 NZD (88%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $5,926 NZD at Brilliant Earth · As of October 31, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG846637158 or 846637158. Listed at 3 retailers as of October 31, 2026, with prices from $692 to $5,926, a $5,234 spread on the same certified stone. Brilliant Earth lists it at $5,926. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846637158
Dimensions15.34 × 7.65 × 4.76 mm
L/W Ratio2.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.34 mm7.65 mm3.16 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846637158
Side View
Table 61.0%Crown 34.2°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $5,926 NZD|Low: $692 NZD|High: $8,463 NZD|Avg: $3,999 NZD|-30.0%
Brilliant Earth
Retailer 2
Retailer 3
November 1, 2026
Retailer 3$692 NZD
Retailer 2$1,432 NZD
Brilliant Earth$5,926 NZD

13 data points across 3 retailers

3 retailers$692 NZD to $5,926 NZD

A
Cheapest Retailer
-
$692 NZD
$390 USD
Final sale: no returns
A
Retailer 2
-
$1,432 NZD
£636 GBP
View
Most Expensive
B
Brilliant Earth
22211938A · Oct 31
$5,926 NZD
$3,340 USD
View
2 more retailers have this diamond
Prices start from $692 NZDSave up to $5,234 NZD

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
$692 NZD