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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 $352 NZD
$198 USD
As of October 27, 2026
Save $1,852 NZD (84%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,204 NZD 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 $352 to $2,204, a $1,852 spread on the same certified stone. Brilliant Earth lists it at $2,204. 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: $2,204 NZD|Low: $352 NZD|High: $2,425 NZD|Avg: $1,111 NZD|-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$352 NZD
Retailer 5$393 NZD
Retailer 3$409 NZD
Retailer 18$437 NZD
Retailer 16$563 NZD
Retailer 7$590 NZD
Retailer 14$732 NZD
Retailer 13$796 NZD
Retailer 10$844 NZD
Retailer 11$965 NZD
Retailer 4$1,038 NZD
Retailer 2$1,102 NZD
Retailer 17$1,406 NZD
Retailer 9$1,501 NZD
Retailer 12$1,848 NZD
Retailer 15$2,047 NZD
Retailer 6$2,113 NZD
Brilliant Earth$2,204 NZD

42 data points across 18 retailers

17 retailers$352 NZD to $2,204 NZD

A
Cheapest Retailer
-
$352 NZD
$198 USD
Retailer 2
-
$409 NZD
$230 USD
View
Price last confirmed 8 days ago
Retailer 3
-
$437 NZD
$246 USD
View
Price last confirmed 8 days ago
Retailer 4
-
$563 NZD
£249 GBP
View
Price last confirmed 16 days ago
B+
Retailer 5
-
$590 NZD
$332 USD
View
A
Retailer 6
-
$732 NZD
€392 EUR
View
Retailer 7
-
$780 NZD
£346 GBP
View
Price last confirmed 13 days ago
A
Retailer 8
-
$796 NZD
£353 GBP
View
A
Retailer 9
-
$965 NZD
$543 USD
View
Retailer 10
-
$1,038 NZD
$584 USD
View
Price last confirmed 7 days ago
B+
Retailer 11
-
$1,102 NZD
$620 USD
View
Retailer 12
-
$1,406 NZD
$791 USD
View
Price last confirmed 8 days ago
B+
Retailer 13
-
$1,501 NZD
$845 USD
View
B
Retailer 14
-
$1,848 NZD
$1,040 USD
View
B
Retailer 15
-
$2,047 NZD
£907 GBP
View
Retailer 16
-
$2,113 NZD
$1,189 USD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
20682223A · Nov 2
$2,204 NZD
$1,240 USD
View
16 more retailers have this diamond
Prices start from $352 NZDSave up to $1,852 NZD

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
$352 NZD