CaratHunter
Plans
Marquise|Lab Grown|IGI

3.91ct G VS1 Marquise Lab Grown Diamond

EX • G/VS1 • IGI LG818603971

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG818603971

Diamond specifications and retailer prices

From $946 NZD
$532 USD
As of November 3, 2026
Save $5,545 NZD (85%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $6,491 NZD at Frank Darling · As of November 3, 2026
View at Frank Darling

About this 3.91ct lab-grown marquise diamond

This 3.91ct 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 LG818603971 or 818603971. Listed at 5 retailers as of November 3, 2026, with prices from $946 to $6,491, a $5,545 spread on the same certified stone. Frank Darling lists it at $6,491. 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

3.91
Carat
G
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818603971
Dimensions16.19 × 8.23 × 5.13 mm
L/W Ratio1.97
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
16.19 mm8.23 mm3.91 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818603971
Side View
Table 61.0%Crown 35°Girdle: STK-THKPavilion 40.5°Culet: NoneDepth 62.3%

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: $6,491 NZD|Low: $946 NZD|High: $6,491 NZD|Avg: $2,723 NZD|-0.0%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 3$946 NZD
Retailer 4$1,330 NZD
Retailer 6$1,619 NZD
Retailer 2$3,432 NZD
Retailer 5$4,614 NZD
Frank Darling$6,491 NZD

16 data points across 6 retailers

5 retailers$946 NZD to $6,491 NZD

A
Cheapest Retailer
-
$946 NZD
$532 USD
Final sale: no returns
B+
Retailer 2
-
$1,330 NZD
$748 USD
View
B+
Retailer 3
-
$3,432 NZD
$1,930 USD
View
Retailer 4
-
$4,614 NZD
$2,595 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Frank Darling
100761348919KD · Nov 3
$6,491 NZD
$3,651 USD
View
4 more retailers have this diamond
Prices start from $946 NZDSave up to $5,545 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
3.91ct Marquise
$946 NZD