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Marquise|Lab Grown|IGI

1.66ct E SI1 Marquise Lab Grown Diamond

ID • E/SI1 • IGI LG807673684

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG807673684

Diamond specifications and retailer prices

From €177 EUR
$198 USD
As of October 27, 2026
Save €929 EUR (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €1,106 EUR at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG807673684 or 807673684. Listed at 17 retailers as of October 27, 2026, with prices from €177 to €1,106, a €929 spread on the same certified stone. Brilliant Earth lists it at €1,106. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.66
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG807673684
Dimensions12.86 × 6.07 × 3.68 mm
L/W Ratio2.12
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.86 mm6.07 mm1.66 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG807673684
Side View
Table 63.0%Crown 35.8°Girdle: MED-THKPavilion 39.1°Culet: NoneDepth 60.6%

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: Oct 27
Current: €1,106 EUR|Low: €177 EUR|High: €1,217 EUR|Avg: €557 EUR|-2.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 2, 2026
Retailer 8€177 EUR
Retailer 5€197 EUR
Retailer 3€205 EUR
Retailer 18€219 EUR
Retailer 16€282 EUR
Retailer 7€296 EUR
Retailer 14€367 EUR
Retailer 13€399 EUR
Retailer 10€424 EUR
Retailer 11€484 EUR
Retailer 4€521 EUR
Retailer 2€553 EUR
Retailer 17€705 EUR
Retailer 9€753 EUR
Retailer 12€927 EUR
Retailer 15€1,027 EUR
Retailer 6€1,060 EUR
Brilliant Earth€1,106 EUR

42 data points across 18 retailers

17 retailers€177 EUR to €1,106 EUR

A
Cheapest Retailer
-
€177 EUR
$198 USD
Retailer 2
-
€205 EUR
$230 USD
View
Price last confirmed 8 days ago
Retailer 3
-
€219 EUR
$246 USD
View
Price last confirmed 8 days ago
Retailer 4
-
€282 EUR
£249 GBP
View
Price last confirmed 16 days ago
B+
Retailer 5
-
€296 EUR
$332 USD
View
A
Retailer 6
-
€367 EUR
View
Retailer 7
-
€392 EUR
£346 GBP
View
Price last confirmed 13 days ago
A
Retailer 8
-
€399 EUR
£353 GBP
View
A
Retailer 9
-
€484 EUR
$543 USD
View
Retailer 10
-
€521 EUR
$584 USD
View
Price last confirmed 7 days ago
B+
Retailer 11
-
€553 EUR
$620 USD
View
Retailer 12
-
€705 EUR
$791 USD
View
Price last confirmed 8 days ago
B+
Retailer 13
-
€753 EUR
$845 USD
View
B
Retailer 14
-
€927 EUR
$1,040 USD
View
B
Retailer 15
-
€1,027 EUR
£907 GBP
View
Retailer 16
-
€1,060 EUR
$1,189 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
20682223A · Nov 2
€1,106 EUR
$1,240 USD
View
16 more retailers have this diamond
Prices start from €177 EURSave up to €929 EUR

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
€177 EUR