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Marquise|Lab Grown|IGI

1.78ct F VVS1 Marquise Lab Grown Diamond

VG • F/VVS1 • IGI LG762550421

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG762550421

Diamond specifications and retailer prices

From $466 NZD
$262 USD
As of November 2, 2026
Save $2,965 NZD (86%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,430 NZD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.78ct lab-grown marquise diamond

This 1.78ct lab-grown marquise sits in the one-and-a-half to two carat band, graded F colour (colourless) and VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI LG762550421 or 762550421. Listed at 11 retailers as of November 2, 2026, with prices from $466 to $3,430, a $2,965 spread on the same certified stone. Brilliant Earth lists it at $3,430. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
F
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle38.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG762550421
Dimensions13.28 × 6.32 × 3.67 mm
L/W Ratio2.10
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.28 mm6.32 mm1.78 ctF / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG762550421
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 38.6°Culet: NoneDepth 58.1%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: $3,430 NZD|Low: $466 NZD|High: $4,034 NZD|Avg: $1,612 NZD|-15.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 10$466 NZD
Retailer 11$540 NZD
Retailer 2$616 NZD
Retailer 6$796 NZD
Retailer 3$800 NZD
Retailer 14$800 NZD
Retailer 16$1,071 NZD
Retailer 7$1,296 NZD
Retailer 15$1,355 NZD
Retailer 5$1,502 NZD
Retailer 9$1,772 NZD
Retailer 13$1,856 NZD
Retailer 4$2,261 NZD
Retailer 12$2,311 NZD
Retailer 8$3,313 NZD
Brilliant Earth$3,430 NZD

34 data points across 16 retailers

11 retailers$466 NZD to $3,430 NZD

A
Cheapest Retailer
-
$466 NZD
$262 USD
A
Retailer 2
-
$540 NZD
$304 USD
View
A
Retailer 3
-
$616 NZD
£273 GBP
View
B+
Retailer 4
-
$800 NZD
$450 USD
View
A
Retailer 5
-
$800 NZD
$450 USD
View
A
Retailer 6
-
$1,071 NZD
€574 EUR
View
A
Retailer 7
-
$1,355 NZD
A$1,173 AUD
View
B+
Retailer 8
-
$1,772 NZD
$997 USD
View
B+
Retailer 9
-
$1,856 NZD
$1,044 USD
View
B+
Retailer 10
-
$2,311 NZD
£1,024 GBP
View
Most Expensive
B
Brilliant Earth
18247344A · Nov 2
$3,430 NZD
$1,930 USD
View
10 more retailers have this diamond
Prices start from $466 NZDSave up to $2,965 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
1.78ct Marquise
$466 NZD