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Cushion|Lab Grown|IGI

1.23ct E SI1 Cushion Lab Grown Diamond

VG • E/SI1 • IGI LG833665783

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG833665783

Diamond specifications and retailer prices

From $327 AUD
As of November 6, 2026
Save $1,303 AUD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,631 AUD at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1.23ct lab-grown cushion diamond

This 1.23ct lab-grown cushion sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG833665783 or 833665783. Listed at 11 retailers as of November 6, 2026, with prices from $327 to $1,631, a $1,303 spread on the same certified stone. Reve Diamonds lists it at $1,631. 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

1.23
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833665783
Dimensions6.26 × 6.17 × 4.15 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.26 mm6.17 mm1.23 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833665783
Side View
Table 61.0%Crown 35.5°Girdle: MED-THKPavilion 39.9°Culet: NoneDepth 67.3%

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: Nov 6
Current: $537 AUD|Low: $307 AUD|High: $1,631 AUD|Avg: $846 AUD|+4.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Reve Diamonds
November 6, 2026
Retailer 2$309 AUD
Retailer 8$327 AUD
Retailer 1$537 AUD
Retailer 3$565 AUD
Retailer 9$569 AUD
Retailer 7$598 AUD
Retailer 6$830 AUD
Retailer 5$1,106 AUD
Retailer 10$1,106 AUD
Retailer 4$1,489 AUD
Reve Diamonds$1,631 AUD

45 data points across 11 retailers

11 retailers$327 AUD to $1,631 AUD

Retailer 1
-
$309 AUD
Price last confirmed 12 days ago
A
Retailer 2
-
$327 AUD
View
Final sale: no returns
A
Retailer 3
-
$537 AUD
View
A
Retailer 4
-
$565 AUD
View
B+
Retailer 5
-
$569 AUD
View
B+
Retailer 6
-
$598 AUD
View
B+
Retailer 7
-
$830 AUD
View
B
Retailer 8
-
$1,106 AUD
View
B
Retailer 9
-
$1,106 AUD
View
B
Retailer 10
-
$1,489 AUD
View
Most Expensive
B
Reve Diamonds
B8323DEFA · Nov 6
$1,631 AUD
$1,121 USD
View
10 more retailers have this diamond
Prices start from $327 AUDSave up to $1,303 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
1.23ct Cushion
$327 AUD