CaratHunter
Plans
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 $262 USD
As of November 2, 2026
Save $1,668 USD (86%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,930 USD 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 $262 to $1,930, a $1,668 spread on the same certified stone. Brilliant Earth lists it at $1,930. 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
Color
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,930 USD|Low: $262 USD|High: $2,270 USD|Avg: $907 USD|-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$262 USD
Retailer 11$304 USD
Retailer 2$347 USD
Retailer 6$448 USD
Retailer 3$450 USD
Retailer 14$450 USD
Retailer 16$603 USD
Retailer 7$729 USD
Retailer 15$762 USD
Retailer 5$845 USD
Retailer 9$997 USD
Retailer 13$1,044 USD
Retailer 4$1,272 USD
Retailer 12$1,300 USD
Retailer 8$1,864 USD
Brilliant Earth$1,930 USD

34 data points across 16 retailers

11 retailers$262 USD to $1,930 USD

A
Cheapest Retailer
-
$262 USD
A
Retailer 2
-
$304 USD
View
A
Retailer 3
-
$347 USD
£273 GBP
View
B+
Retailer 4
-
$450 USD
View
A
Retailer 5
-
$450 USD
View
A
Retailer 6
-
$603 USD
€574 EUR
View
A
Retailer 7
-
$762 USD
A$1,173 AUD
View
B+
Retailer 8
-
$997 USD
View
B+
Retailer 9
-
$1,044 USD
View
B+
Retailer 10
-
$1,300 USD
£1,024 GBP
View
Most Expensive
B
Brilliant Earth
18247344A · Nov 2
$1,930 USD
View
10 more retailers have this diamond
Prices start from $262 USDSave up to $1,668 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
1.78ct Marquise
$262 USD