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Cushion|Lab Grown|IGI

1.64ct E SI1 Cushion Lab Grown Diamond

GD • E/SI1 • IGI LG611385678

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG611385678

Diamond specifications and retailer prices

From $337 AUD
$237 USD
As of October 28, 2026
Save $2,524 AUD (88%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $2,861 AUD at Do Amore Diamonds · As of October 27, 2026
View at Do Amore Diamonds

About this 1.64ct lab-grown cushion diamond

This 1.64ct 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 standard cut grade and certified by IGI LG611385678 or 611385678. Listed at 7 retailers as of October 27, 2026, with prices from $337 to $2,861, a $2,524 spread on the same certified stone. Do Amore Diamonds lists it at $2,861. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.64
Carat
E
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG611385678
Dimensions6.90 × 6.85 × 4.54 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.90 mm6.85 mm1.64 ctE / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG611385678
Side View
Table 61.0%Crown 34.8°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 66.3%

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 28
Current: $2,861 AUD|Low: $214 AUD|High: $2,890 AUD|Avg: $1,192 AUD|+6.9%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 27, 2026
Retailer 7$337 AUD
Retailer 2$524 AUD
Retailer 5$635 AUD
Retailer 10$664 AUD
Retailer 8$780 AUD
Retailer 11$796 AUD
Retailer 3$1,034 AUD
Retailer 4$1,636 AUD
Retailer 6$1,822 AUD
Retailer 9$2,050 AUD
Do Amore Diamonds$2,861 AUD

30 data points across 11 retailers

7 retailers$337 AUD to $2,861 AUD

A
Cheapest Retailer
-
$337 AUD
$237 USD
Final sale: no returns
A
Retailer 2
-
$524 AUD
£290 GBP
View
B
Retailer 3
-
$635 AUD
$446 USD
View
B
Retailer 4
-
$1,636 AUD
£905 GBP
View
B
Retailer 5
-
$1,822 AUD
$1,280 USD
View
B
Retailer 6
-
$2,050 AUD
$1,440 USD
View
Most Expensive
C
Do Amore Diamonds
27-974BF901B · Oct 27
$2,861 AUD
$2,010 USD
View
6 more retailers have this diamond
Prices start from $337 AUDSave up to $2,524 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
1.64ct Cushion
$337 AUD