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Marquise|Lab Grown|IGI

3.18ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG844649228

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG844649228

Diamond specifications and retailer prices

From $393 USD
As of October 31, 2026
Save $1,862 USD (83%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $2,255 USD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 3.18ct lab-grown marquise diamond

This 3.18ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG844649228 or 844649228. Listed at 3 retailers as of October 28, 2026, with prices from $393 to $2,255, a $1,862 spread on the same certified stone. Rare Carat lists it at $2,255. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.18
Carat
G
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844649228
Dimensions14.97 × 7.52 × 4.83 mm
L/W Ratio1.99
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
14.97 mm7.52 mm3.18 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844649228
Side View
Table 62.0%Crown 37.3°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 64.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: $2,255 USD|Low: $393 USD|High: $2,255 USD|Avg: $860 USD
Rare Carat
Retailer 2
Retailer 3
November 1, 2026
Retailer 3$393 USD
Retailer 2$818 USD
Rare Carat$2,255 USD

19 data points across 3 retailers

3 retailers$393 USD to $2,255 USD

A
Cheapest Retailer
-
$393 USD
Final sale: no returns
A
Retailer 2
-
$818 USD
£644 GBP
View
Most Expensive
B
Rare Carat
844649228 · Oct 28
$2,255 USD
View
2 more retailers have this diamond
Prices start from $393 USDSave up to $1,862 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
3.18ct Marquise
$393 USD