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Marquise|Lab Grown|IGI

1.66ct F VS2 Marquise Lab Grown Diamond

EX • F/VS2 • IGI LG717581139

Shape and cutting style on the report: Marquise modified brilliant

Certificate IGI LG717581139

Diamond specifications and retailer prices

From $730 USD
As of November 2, 2026
Save $2,130 USD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,520 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.66ct lab-grown marquise diamond

This 1.66ct lab-grown marquise sits in the one-and-a-half to two carat band, graded F colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG717581139 or 717581139. Listed at 13 retailers as of November 1, 2026, with a 292% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
F
Color
VS2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.8°
Pavilion angle42.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG717581139
Dimensions15.09 × 5.36 × 3.23 mm
L/W Ratio2.82
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
15.09 mm5.36 mm1.66 ctF / VS2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG717581139
Side View
Table 59.0%Crown 31.8°Girdle: STK-THKPavilion 42.3°Culet: LargeDepth 60.3%

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: $3,520 USD|Low: $700 USD|High: $6,480 USD|Avg: $1,533 USD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 7$730 USD
Retailer 11$794 USD
Retailer 3$817 USD
Retailer 8$846 USD
Retailer 12$846 USD
Retailer 5$1,025 USD
Retailer 4$1,166 USD
Retailer 6$1,194 USD
Retailer 2$1,434 USD
Retailer 10$2,627 USD
Retailer 9$2,860 USD
MOH London$3,520 USD

43 data points across 12 retailers

13 retailers$730 USD to $2,860 USD

A
Cheapest Retailer
-
$730 USD
A
Retailer 2
-
$794 USD
View
A
Retailer 3
-
$817 USD
View
Final sale: no returns
B+
Retailer 4
-
$846 USD
View
Retailer 5
-
$846 USD
View
Price last confirmed 16 days ago
B+
Retailer 6
-
$1,025 USD
View
B
Retailer 7
-
$1,166 USD
View
B+
Retailer 8
-
$1,194 USD
View
B
Retailer 9
-
$1,434 USD
£1,129 GBP
View
B
Retailer 10
-
$2,627 USD
View
B
Retailer 11
-
$2,860 USD
View
Most Expensive
MOH London
LG717581139 · Oct 29
$3,520 USD
£2,772 GBP
View
Price under review
11 more retailers have this diamond
Prices start from $730 USDSave up to $2,130 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
1.66ct Marquise
$730 USD