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Cushion|Lab Grown|IGI

1.75ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG563241289

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG563241289

Diamond specifications and retailer prices

From $1,979 AUD
$1,390 USD
As of October 28, 2026
3 retailers carry this diamond
Most expensive: $1,979 AUD at Brilliant Earth
View at Brilliant Earth

About this 1.75ct lab-grown cushion diamond

This 1.75ct 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 LG563241289 or 563241289. Listed at 3 retailers as of October 28, 2026. 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

1.75
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG563241289
Dimensions8.09 × 6.51 × 4.43 mm
L/W Ratio1.24
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
8.09 mm6.51 mm1.75 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG563241289
Side View
Table 62.0%Crown 32.2°Girdle: THN-STKPavilion 39.1°Culet: NoneDepth 68.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $1,979 AUD|Low: $225 AUD|High: $2,932 AUD|Avg: $1,252 AUD|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 4, 2026
Retailer 6$339 AUD
Retailer 2$645 AUD
Retailer 9$678 AUD
Retailer 10$810 AUD
Retailer 8$878 AUD
Retailer 3$1,058 AUD
Retailer 5$1,264 AUD
Retailer 4$1,676 AUD
Retailer 11$1,722 AUD
Brilliant Earth$1,979 AUD
Retailer 7$2,904 AUD

9 data points across 11 retailers

3 retailers

B+
Retailer 1
-
$645 AUD
$453 USD
Price last confirmed 25 days ago
B
Retailer 2
-
$1,676 AUD
£927 GBP
View
Price last confirmed 23 days ago
Most Expensive
B
Brilliant Earth
6700430Y · Oct 28
$1,979 AUD
$1,390 USD
View
2 more retailers have this diamond

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.

B+
1.75ct Cushion
$1,979 AUD