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Marquise|Lab Grown|IGI

1.78ct F VVS1 Marquise Lab Grown Diamond

VG • F/VVS1 • IGI LG788646744

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG788646744

Diamond specifications and retailer prices

From $321 USD
As of November 1, 2026
Save $1,639 USD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,960 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 LG788646744 or 788646744. Listed at 19 retailers as of November 1, 2026, with prices from $321 to $1,960, a $1,639 spread on the same certified stone. Brilliant Earth lists it at $1,960. 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 angle33.1°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788646744
Dimensions13.26 × 6.34 × 3.69 mm
L/W Ratio2.09
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.26 mm6.34 mm1.78 ctF / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788646744
Side View
Table 61.0%Crown 33.1°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 58.2%

Caratlytics Score

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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 1
Current: $1,960 USD|Low: $321 USD|High: $2,160 USD|Avg: $993 USD|-9.3%
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
Retailer 17
Retailer 18
November 2, 2026
Retailer 6$321 USD
Retailer 16$332 USD
Retailer 18$480 USD
Retailer 9$515 USD
Retailer 15$611 USD
Retailer 14$624 USD
Retailer 7$657 USD
Retailer 3$702 USD
Retailer 8$837 USD
Retailer 12$837 USD
Retailer 11$1,089 USD
Retailer 13$1,140 USD
Retailer 5$1,194 USD
Retailer 2$1,370 USD
Retailer 17$1,427 USD
Retailer 4$1,488 USD
Retailer 10$1,785 USD
Brilliant Earth$1,960 USD

19 data points across 18 retailers

19 retailers$321 USD to $1,960 USD

A
Cheapest Retailer
-
$321 USD
Final sale: no returns
A
Retailer 2
-
$332 USD
View
B+
Retailer 3
-
$480 USD
View
A
Retailer 4
-
$515 USD
View
A
Retailer 5
-
$611 USD
ZAR 9,878 ZAR
View
A
Retailer 6
-
$624 USD
£492 GBP
View
A
Retailer 7
-
$657 USD
€626 EUR
View
A
Retailer 8
-
$702 USD
View
B+
Retailer 9
-
$837 USD
A$1,287 AUD
View
A
Retailer 10
-
$837 USD
View
B
Retailer 11
-
$1,089 USD
View
B+
Retailer 12
-
$1,140 USD
SGD 1,540 SGD
View
B+
Retailer 13
-
$1,194 USD
View
B
Retailer 14
-
$1,370 USD
View
B
Retailer 15
-
$1,427 USD
£1,124 GBP
View
Retailer 16
-
$1,487 USD
A$2,288 AUD
View
Price last confirmed 28 days ago
B
Retailer 17
-
$1,488 USD
View
B
Retailer 18
-
$1,785 USD
View
Most Expensive
B
Brilliant Earth
18729050A · Nov 2
$1,960 USD
View
18 more retailers have this diamond
Prices start from $321 USDSave up to $1,639 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
$321 USD