CaratHunter
Plans
Cushion|Lab Grown|IGI

1.38ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG623488097

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG623488097

Diamond specifications and retailer prices

From $329 AUD
$231 USD
As of October 30, 2026
Save $1,404 AUD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,732 AUD at Reve Diamonds · As of October 30, 2026
View at Reve Diamonds

About this 1.38ct lab-grown cushion diamond

This 1.38ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG623488097 or 623488097. Listed at 12 retailers as of October 30, 2026, with prices from $329 to $1,732, a $1,404 spread on the same certified stone. Reve Diamonds lists it at $1,732. 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

1.38
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.6°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623488097
Dimensions6.73 × 6.52 × 4.40 mm
L/W Ratio1.03
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
6.73 mm6.52 mm1.38 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623488097
Side View
Table 62.0%Crown 39.6°Girdle: MED-THKPavilion 41.2°Culet: NoneDepth 67.5%

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 30
Current: $1,210 AUD|Low: $232 AUD|High: $2,292 AUD|Avg: $1,021 AUD|-47.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Reve Diamonds
October 30, 2026
Retailer 6$329 AUD
Retailer 2$632 AUD
Retailer 4$675 AUD
Retailer 5$700 AUD
Retailer 10$722 AUD
Retailer 9$800 AUD
Retailer 11$992 AUD
Retailer 1$1,210 AUD
Retailer 8$1,246 AUD
Retailer 3$1,252 AUD
Retailer 7$1,475 AUD
Reve Diamonds$1,732 AUD

43 data points across 12 retailers

12 retailers$329 AUD to $1,732 AUD

A
Cheapest Retailer
-
$329 AUD
$231 USD
Final sale: no returns
A
Retailer 2
-
$632 AUD
$444 USD
View
A
Retailer 3
-
$675 AUD
£373 GBP
View
A
Retailer 4
-
$700 AUD
€468 EUR
View
A
Retailer 5
-
$722 AUD
$507 USD
View
B+
Retailer 6
-
$800 AUD
$562 USD
View
B+
Retailer 7
-
$992 AUD
$697 USD
View
B+
Retailer 8
-
$1,210 AUD
$850 USD
View
Retailer 9
-
$1,246 AUD
$875 USD
View
Price last confirmed 9 days ago
B
Retailer 10
-
$1,252 AUD
$880 USD
View
B
Retailer 11
-
$1,475 AUD
£816 GBP
View
Most Expensive
B
Reve Diamonds
48E84B908 · Oct 30
$1,732 AUD
$1,217 USD
View
11 more retailers have this diamond
Prices start from $329 AUDSave up to $1,404 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
1.38ct Cushion
$329 AUD