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Cushion|Lab Grown|IGI

1.23ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG801682433

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG801682433

Diamond specifications and retailer prices

From $378 AUD
As of November 6, 2026
Save $699 AUD (65%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,525 AUD at Reve Diamonds · As of October 25, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG801682433 or 801682433. Listed at 15 retailers as of November 6, 2026, with a 185% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.23
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801682433
Dimensions6.71 × 5.53 × 4.06 mm
L/W Ratio1.21
Girdle conditionFaceted
Culet sizePointed
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
6.71 mm5.53 mm1.23 ctF / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG801682433
Side View
Table 64.0%Crown 38°Girdle: STK-VTKPavilion 36.2°Culet: NoneDepth 73.4%

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: $483 AUD|Low: $250 AUD|High: $1,628 AUD|Avg: $823 AUD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Reve Diamonds
November 7, 2026
Retailer 3$250 AUD
Retailer 4$378 AUD
Retailer 5$477 AUD
Retailer 1$483 AUD
Retailer 10$541 AUD
Retailer 7$621 AUD
Retailer 6$677 AUD
Retailer 2$754 AUD
Retailer 9$902 AUD
Retailer 12$975 AUD
Retailer 8$1,077 AUD
Retailer 11$1,303 AUD
Reve Diamonds$1,525 AUD

38 data points across 13 retailers

15 retailers$378 AUD to $1,077 AUD

B+
Cheapest Retailer
-
$378 AUD
A
Retailer 2
-
$477 AUD
View
Retailer 3
-
$483 AUD
View
Retailer 4
-
$541 AUD
View
Price last confirmed 10 days ago
Retailer 5
-
$559 AUD
View
Price last confirmed 26 days ago
B+
Retailer 6
-
$621 AUD
View
B+
Retailer 7
-
$677 AUD
View
Retailer 8
-
$696 AUD
View
Price last confirmed 12 days ago
Retailer 9
-
$754 AUD
View
Price last confirmed 12 days ago
Retailer 10
-
$895 AUD
View
Price last confirmed 44 days ago
B+
Retailer 11
-
$902 AUD
View
Retailer 12
-
$975 AUD
View
Price last confirmed 11 days ago
B
Retailer 13
-
$1,077 AUD
View
Retailer 14
-
$1,303 AUD
View
Price last confirmed 12 days ago
Most Expensive
Reve Diamonds
E41CDD5BE · Oct 25
$1,525 AUD
$1,048 USD
View
Price last confirmed 12 days ago
14 more retailers have this diamond
Prices start from $378 AUDSave up to $699 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
$378 AUD