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Marquise|Lab Grown|IGI

3.78ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG812649575

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG812649575

Diamond specifications and retailer prices

From $983 NZD
$553 USD
As of November 3, 2026
Save $5,294 NZD (84%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $6,490 NZD at Brilliant Earth · As of October 1, 2026
View at Brilliant Earth

About this 3.78ct lab-grown marquise diamond

This 3.78ct 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 LG812649575 or 812649575. Listed at 6 retailers as of November 2, 2026, with a 538% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.78
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812649575
Dimensions15.55 × 8.13 × 5.26 mm
L/W Ratio1.91
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.55 mm8.13 mm3.78 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812649575
Side View
Table 56.0%Crown 36.7°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 64.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 3
Current: $6,490 NZD|Low: $983 NZD|High: $6,490 NZD|Avg: $4,044 NZD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 27, 2026
Retailer 4$983 NZD
Retailer 3$1,366 NZD
Retailer 7$1,663 NZD
Retailer 6$3,567 NZD
Retailer 5$5,530 NZD
Retailer 2$6,277 NZD
Brilliant Earth$6,490 NZD

15 data points across 7 retailers

6 retailers$983 NZD to $6,277 NZD

A
Cheapest Retailer
-
$983 NZD
$553 USD
Final sale: no returns
B+
Retailer 2
-
$1,366 NZD
$768 USD
View
B+
Retailer 3
-
$3,567 NZD
$2,006 USD
View
B
Retailer 4
-
$5,530 NZD
$3,110 USD
View
B
Retailer 5
-
$6,277 NZD
$3,530 USD
View
Most Expensive
Brilliant Earth
21279979A · Oct 1
$6,490 NZD
$3,650 USD
View
Price last confirmed 33 days ago
5 more retailers have this diamond
Prices start from $983 NZDSave up to $5,294 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
3.78ct Marquise
$983 NZD