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Marquise|Lab Grown|IGI

1.78ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG847640520

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG847640520

Diamond specifications and retailer prices

From $267 USD
As of November 2, 2026
Save $1,163 USD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,430 USD at With Clarity · As of November 1, 2026
View at With Clarity

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 LG847640520 or 847640520. Listed at 12 retailers as of November 1, 2026, with prices from $267 to $1,430, a $1,163 spread on the same certified stone. With Clarity lists it at $1,430. 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 angle36°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG847640520
Dimensions12.53 × 6.32 × 3.95 mm
L/W Ratio1.98
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.53 mm6.32 mm1.78 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG847640520
Side View
Table 60.0%Crown 36°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 62.5%

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: $387 USD|Low: $267 USD|High: $1,430 USD|Avg: $816 USD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
With Clarity
November 2, 2026
Retailer 11$267 USD
Retailer 9$310 USD
Retailer 1$387 USD
Retailer 5$490 USD
Retailer 2$545 USD
Retailer 3$679 USD
Retailer 10$770 USD
Retailer 4$1,018 USD
Retailer 7$1,065 USD
Retailer 8$1,215 USD
Retailer 6$1,335 USD
With Clarity$1,430 USD

10 data points across 12 retailers

12 retailers$267 USD to $1,430 USD

A
Cheapest Retailer
-
$267 USD
A
Retailer 2
-
$310 USD
View
A
Retailer 3
-
$387 USD
£305 GBP
View
A
Retailer 4
-
$490 USD
View
Retailer 5
-
$545 USD
€519 EUR
View
Price last confirmed 8 days ago
A
Retailer 6
-
$679 USD
View
A
Retailer 7
-
$770 USD
A$1,185 AUD
View
B+
Retailer 8
-
$1,018 USD
View
B+
Retailer 9
-
$1,065 USD
View
B
Retailer 10
-
$1,215 USD
View
B
Retailer 11
-
$1,335 USD
£1,051 GBP
View
Most Expensive
B
With Clarity
847640520 · Nov 1
$1,430 USD
View
11 more retailers have this diamond
Prices start from $267 USDSave up to $1,163 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
$267 USD