CaratHunter
Plans
Cushion|Lab Grown|IGI

1.50ct D SI1 Cushion Lab Grown Diamond

EX • D/SI1 • IGI LG623451210

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG623451210

Diamond specifications and retailer prices

From $429 AUD
$301 USD
As of November 1, 2026
Save $2,974 AUD (87%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,402 AUD at Do Amore Diamonds · As of November 1, 2026
View at Do Amore Diamonds

About this 1.5ct lab-grown cushion diamond

This 1.5ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG623451210 or 623451210. Listed at 12 retailers as of November 1, 2026, with prices from $429 to $3,402, a $2,974 spread on the same certified stone. Do Amore Diamonds lists it at $3,402. 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

1.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG623451210
Dimensions6.90 × 6.68 × 4.23 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
6.90 mm6.68 mm1.50 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG623451210
Side View
Table 60.0%Crown 36.9°Girdle: MED-STKPavilion 36.7°Culet: NoneDepth 63.3%

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: Nov 1
Current: $3,402 AUD|Low: $429 AUD|High: $3,716 AUD|Avg: $1,428 AUD|-8.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 7$429 AUD
Retailer 6$475 AUD
Retailer 3$562 AUD
Retailer 5$588 AUD
Retailer 10$626 AUD
Retailer 11$635 AUD
Retailer 2$923 AUD
Retailer 8$2,011 AUD
Retailer 4$2,115 AUD
Retailer 9$2,833 AUD
Do Amore Diamonds$3,402 AUD

40 data points across 11 retailers

12 retailers$429 AUD to $3,402 AUD

A
Cheapest Retailer
-
$429 AUD
$301 USD
Final sale: no returns
Retailer 2
-
$475 AUD
$334 USD
View
Price last confirmed 7 days ago
A
Retailer 3
-
$562 AUD
$395 USD
View
Retailer 4
-
$588 AUD
£325 GBP
View
Price last confirmed 15 days ago
A
Retailer 5
-
$626 AUD
$440 USD
View
B+
Retailer 6
-
$635 AUD
$446 USD
View
A
Retailer 7
-
$705 AUD
$495 USD
View
B+
Retailer 8
-
$923 AUD
£511 GBP
View
B
Retailer 9
-
$1,922 AUD
$1,350 USD
View
B
Retailer 10
-
$2,011 AUD
$1,413 USD
View
B
Retailer 11
-
$2,115 AUD
£1,170 GBP
View
Most Expensive
B
Do Amore Diamonds
27-26C7668BD · Nov 1
$3,402 AUD
$2,390 USD
View
11 more retailers have this diamond
Prices start from $429 AUDSave up to $2,974 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
1.50ct Cushion
$429 AUD