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Marquise|Lab Grown|IGI

1.78ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG840631245

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG840631245

Diamond specifications and retailer prices

From $310 USD
As of November 2, 2026
Save $1,235 USD (80%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,545 USD at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG840631245 or 840631245. Listed at 18 retailers as of November 1, 2026, with prices from $310 to $1,545, a $1,235 spread on the same certified stone. Reve Diamonds lists it at $1,545. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
F
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840631245
Dimensions13.14 × 6.18 × 3.82 mm
L/W Ratio2.13
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
13.14 mm6.18 mm1.78 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840631245
Side View
Table 57.0%Crown 34.1°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 61.8%

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 2
Current: $449 USD|Low: $307 USD|High: $1,590 USD|Avg: $784 USD|-3.8%
Retailer 1
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Retailer 12
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Retailer 18
Reve Diamonds
November 2, 2026
Retailer 11$310 USD
Retailer 5$347 USD
Retailer 8$381 USD
Retailer 17$385 USD
Retailer 1$449 USD
Retailer 15$518 USD
Retailer 16$540 USD
Retailer 13$663 USD
Retailer 10$665 USD
Retailer 12$685 USD
Retailer 2$708 USD
Retailer 6$889 USD
Retailer 7$1,101 USD
Retailer 9$1,171 USD
Retailer 18$1,236 USD
Retailer 4$1,283 USD
Retailer 3$1,478 USD
Retailer 14$1,542 USD
Reve Diamonds$1,545 USD

28 data points across 19 retailers

18 retailers$310 USD to $1,545 USD

A
Cheapest Retailer
-
$310 USD
A
Retailer 2
-
$347 USD
View
Final sale: no returns
Retailer 3
-
$381 USD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$385 USD
View
A
Retailer 5
-
$449 USD
£354 GBP
View
B+
Retailer 6
-
$518 USD
View
A
Retailer 7
-
$540 USD
View
A
Retailer 8
-
$663 USD
ZAR 10,714 ZAR
View
A
Retailer 9
-
$685 USD
£539 GBP
View
A
Retailer 10
-
$708 USD
View
A
Retailer 11
-
$889 USD
A$1,367 AUD
View
Retailer 12
-
$1,101 USD
A$1,694 AUD
View
Price last confirmed 7 days ago
B
Retailer 13
-
$1,171 USD
View
B+
Retailer 14
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$1,236 USD
View
B+
Retailer 15
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$1,283 USD
View
B
Retailer 16
-
$1,478 USD
View
B
Retailer 17
-
$1,542 USD
£1,214 GBP
View
Most Expensive
B
Reve Diamonds
8EE645827 · Nov 1
$1,545 USD
View
17 more retailers have this diamond
Prices start from $310 USDSave up to $1,235 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
$310 USD