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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 £686 GBP
$919 USD
As of October 30, 2026
Save £2,262 GBP (77%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,948 GBP 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 £686 to £2,948, a £2,262 spread on the same certified stone. Brilliant Earth lists it at £2,948. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,948 GBP|Low: £618 GBP|High: £3,873 GBP|Avg: £1,546 GBP|-23.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 4£686 GBP
Retailer 3£799 GBP
Retailer 2£1,184 GBP
Retailer 5£1,548 GBP
Retailer 6£2,099 GBP
Brilliant Earth£2,948 GBP

29 data points across 6 retailers

6 retailers£686 GBP to £2,948 GBP

A
Cheapest Retailer
-
£686 GBP
$919 USD
A
Retailer 2
-
£799 GBP
$1,071 USD
View
A
Retailer 3
-
£1,184 GBP
$1,586 USD
View
B+
Retailer 4
-
£1,548 GBP
€1,975 EUR
View
B+
Retailer 5
-
£2,099 GBP
View
Most Expensive
B
Brilliant Earth
20556096A · Oct 30
£2,948 GBP
$3,950 USD
View
5 more retailers have this diamond
Prices start from £686 GBPSave up to £2,262 GBP

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
£686 GBP