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Cushion|Lab Grown|IGI

1.71ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG766660227

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG766660227

Diamond specifications and retailer prices

From $668 AUD
€447 EUR
As of October 29, 2026
Save $2,421 AUD (78%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $3,089 AUD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.71ct lab-grown cushion diamond

This 1.71ct lab-grown cushion 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 LG766660227 or 766660227. Listed at 9 retailers as of October 28, 2026, with prices from $668 to $3,089, a $2,421 spread on the same certified stone. Brilliant Earth lists it at $3,089. 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

1.71
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle32.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG766660227
Dimensions7.63 × 6.67 × 4.02 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.63 mm6.67 mm1.71 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG766660227
Side View
Table 59.0%Crown 33.7°Girdle: MED-THKPavilion 32.3°Culet: NoneDepth 60.3%

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 29
Current: $3,089 AUD|Low: $653 AUD|High: $3,174 AUD|Avg: $1,269 AUD|-2.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 2$668 AUD
Retailer 6$689 AUD
Retailer 4$758 AUD
Retailer 7$776 AUD
Retailer 8$811 AUD
Retailer 9$1,376 AUD
Retailer 5$1,544 AUD
Retailer 3$1,631 AUD
Brilliant Earth$3,089 AUD

41 data points across 9 retailers

9 retailers$668 AUD to $3,089 AUD

A
Cheapest Retailer
-
$668 AUD
€447 EUR
B+
Retailer 2
-
$689 AUD
$484 USD
View
A
Retailer 3
-
$758 AUD
£419 GBP
View
A
Retailer 4
-
$776 AUD
$545 USD
View
A
Retailer 5
-
$811 AUD
$570 USD
View
B+
Retailer 6
-
$1,376 AUD
$967 USD
View
B
Retailer 7
-
$1,544 AUD
$1,085 USD
View
Price last confirmed 10 days ago
B
Retailer 8
-
$1,631 AUD
£902 GBP
View
Most Expensive
B
Brilliant Earth
17710949A · Oct 28
$3,089 AUD
$2,170 USD
View
8 more retailers have this diamond
Prices start from $668 AUDSave up to $2,421 AUD

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
1.71ct Cushion
$668 AUD