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Cushion|Lab Grown|IGI

1.59ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG693553609

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG693553609

Diamond specifications and retailer prices

From $585 AUD
$411 USD
As of November 1, 2026
Save $1,123 AUD (66%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,708 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.59ct lab-grown cushion diamond

This 1.59ct 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 LG693553609 or 693553609. Listed at 9 retailers as of October 31, 2026, with prices from $585 to $1,708, a $1,123 spread on the same certified stone. Brilliant Earth lists it at $1,708. 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

1.59
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle29.3°
Pavilion angle42.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG693553609
Dimensions8.02 × 6.31 × 4.23 mm
L/W Ratio1.27
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.02 mm6.31 mm1.59 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG693553609
Side View
Table 64.0%Crown 29.3°Girdle: MED-STKPavilion 42.4°Culet: NoneDepth 67.0%

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 1
Current: $1,708 AUD|Low: $333 AUD|High: $1,936 AUD|Avg: $880 AUD|-11.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 6$333 AUD
Retailer 5$373 AUD
Retailer 7$585 AUD
Retailer 4$586 AUD
Retailer 3$605 AUD
Retailer 9$759 AUD
Retailer 8$813 AUD
Retailer 2$1,558 AUD
Brilliant Earth$1,708 AUD

36 data points across 9 retailers

9 retailers$585 AUD to $1,708 AUD

Retailer 1
-
$333 AUD
$234 USD
Price last confirmed 20 days ago
Retailer 2
-
$373 AUD
£206 GBP
View
Price last confirmed 15 days ago
B+
Retailer 3
-
$585 AUD
$411 USD
View
A
Retailer 4
-
$586 AUD
€392 EUR
View
A
Retailer 5
-
$605 AUD
£335 GBP
View
A
Retailer 6
-
$759 AUD
$533 USD
View
A
Retailer 7
-
$813 AUD
$571 USD
View
B
Retailer 8
-
$1,558 AUD
£862 GBP
View
Most Expensive
B
Brilliant Earth
13584838A · Oct 31
$1,708 AUD
$1,200 USD
View
8 more retailers have this diamond
Prices start from $585 AUDSave up to $1,123 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
1.59ct Cushion
$585 AUD