Marquise|Lab Grown|IGI

1.73ct E FL Marquise Lab Grown Diamond

ID • E/FL • IGI LG801691886

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG801691886

Diamond specifications and retailer prices

From $919 USD
As of October 30, 2026
Save $3,031 USD (77%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,950 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.73ct lab-grown marquise diamond

This 1.73ct lab-grown marquise sits in the one-and-a-half to two carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG801691886 or 801691886. Listed at 6 retailers as of October 30, 2026, with prices from $919 to $3,950, a $3,031 spread on the same certified stone. Brilliant Earth lists it at $3,950. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.73
Carat
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801691886
Dimensions12.35 × 6.47 × 3.82 mm
L/W Ratio1.91
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.35 mm6.47 mm1.73 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG801691886
Side View
Table 58.0%Crown 34.7°Girdle: THN-STKPavilion 38.9°Culet: NoneDepth 59.0%

Caratlytics Score

How it works →
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: Oct 30
Current: $3,950 USD|Low: $828 USD|High: $5,190 USD|Avg: $2,071 USD|-23.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 3$919 USD
Retailer 2$1,071 USD
Retailer 4$1,535 USD
Retailer 5$2,074 USD
Retailer 6$2,812 USD
Brilliant Earth$3,950 USD

28 data points across 6 retailers

6 retailers$919 USD to $3,950 USD

A
Cheapest Retailer
-
$919 USD
A
Retailer 2
-
$1,071 USD
View
A
Retailer 3
-
$1,535 USD
View
B+
Retailer 4
-
$2,074 USD
€1,975 EUR
View
B+
Retailer 5
-
$2,812 USD
£2,214 GBP
View
Most Expensive
B
Brilliant Earth
20556096A · Oct 30
$3,950 USD
View
5 more retailers have this diamond
Prices start from $919 USDSave up to $3,031 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
1.73ct Marquise
$919 USD