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Cushion|Lab Grown|IGI

1.51ct D SI2 Cushion Lab Grown Diamond

EX • D/SI2 • IGI LG843655596

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

Certificate IGI LG843655596

Diamond specifications and retailer prices

From $623 AUD
As of November 6, 2026
Save $28 AUD (4%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $651 AUD at 77 Diamonds · As of November 5, 2026
View at 77 Diamonds

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG843655596 or 843655596. Listed at 3 retailers as of November 5, 2026, with a relatively tight 5% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.51
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.6°
Pavilion angle32.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843655596
Dimensions6.58 × 6.25 × 4.01 mm
L/W Ratio1.05
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
6.58 mm6.25 mm1.51 ctD / SI2
OriginLab Grown
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG843655596
Side View
Table 63.0%Crown 33.6°Girdle: THK-VTKPavilion 32.5°Culet: NoneDepth 64.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $651 AUD|Low: $623 AUD|High: $651 AUD|Avg: $638 AUD
77 Diamonds
Retailer 2
Retailer 3
November 5, 2026
Retailer 3$623 AUD
Retailer 2$627 AUD
77 Diamonds$651 AUD

3 data points across 3 retailers

3 retailers$623 AUD to $651 AUD

B+
Cheapest Retailer
-
$623 AUD
A
Retailer 2
-
$627 AUD
View
Most Expensive
B+
77 Diamonds
CUSPUIFSJ3TZUKHA · Nov 5
$651 AUD
£352 GBP
View
2 more retailers have this diamond
Prices start from $623 AUDSave up to $28 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
1.51ct Cushion
$623 AUD