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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 $421 NZD
$237 USD
As of October 28, 2026
Save $3,146 NZD (88%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $3,566 NZD 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 $421 to $3,566, a $3,146 spread on the same certified stone. Do Amore Diamonds lists it at $3,566. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $3,566 NZD|Low: $266 NZD|High: $3,602 NZD|Avg: $1,486 NZD|+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$421 NZD
Retailer 2$653 NZD
Retailer 5$791 NZD
Retailer 10$827 NZD
Retailer 8$972 NZD
Retailer 11$992 NZD
Retailer 3$1,289 NZD
Retailer 4$2,039 NZD
Retailer 6$2,271 NZD
Retailer 9$2,555 NZD
Do Amore Diamonds$3,566 NZD

30 data points across 11 retailers

7 retailers$421 NZD to $3,566 NZD

A
Cheapest Retailer
-
$421 NZD
$237 USD
Final sale: no returns
A
Retailer 2
-
$653 NZD
£290 GBP
View
B
Retailer 3
-
$791 NZD
$446 USD
View
B
Retailer 4
-
$2,039 NZD
£905 GBP
View
B
Retailer 5
-
$2,271 NZD
$1,280 USD
View
B
Retailer 6
-
$2,555 NZD
$1,440 USD
View
Most Expensive
C
Do Amore Diamonds
27-974BF901B · Oct 27
$3,566 NZD
$2,010 USD
View
6 more retailers have this diamond
Prices start from $421 NZDSave up to $3,146 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
1.64ct Cushion
$421 NZD