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Cushion|Lab Grown|IGI

1.67ct D SI1 Cushion Lab Grown Diamond

GD • D/SI1 • IGI LG538297406

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG538297406

Diamond specifications and retailer prices

From $325 AUD
$228 USD
As of October 30, 2026
Save $1,811 AUD (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,135 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.67ct lab-grown cushion diamond

This 1.67ct 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 standard cut grade and certified by IGI LG538297406 or 538297406. Listed at 14 retailers as of October 30, 2026, with prices from $325 to $2,135, a $1,811 spread on the same certified stone. Brilliant Earth lists it at $2,135. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.67
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG538297406
Dimensions6.62 × 6.59 × 4.27 mm
L/W Ratio1.00
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
6.62 mm6.59 mm1.67 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG538297406
Side View
Table 63.0%Crown 37.8°Girdle: THK-VTKPavilion 31.9°Culet: NoneDepth 64.8%

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: Oct 30
Current: $2,135 AUD|Low: $325 AUD|High: $2,278 AUD|Avg: $940 AUD|-6.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 11$325 AUD
Retailer 9$362 AUD
Retailer 7$487 AUD
Retailer 5$589 AUD
Retailer 4$664 AUD
Retailer 3$732 AUD
Retailer 10$841 AUD
Retailer 6$876 AUD
Retailer 8$1,488 AUD
Retailer 2$1,689 AUD
Brilliant Earth$2,135 AUD

44 data points across 11 retailers

14 retailers$325 AUD to $2,135 AUD

A
Cheapest Retailer
-
$325 AUD
$228 USD
Final sale: no returns
Retailer 2
-
$362 AUD
$254 USD
View
Price last confirmed 7 days ago
B+
Retailer 3
-
$487 AUD
$342 USD
View
A
Retailer 4
-
$589 AUD
€394 EUR
View
B+
Retailer 5
-
$664 AUD
£367 GBP
View
B+
Retailer 6
-
$732 AUD
$514 USD
View
B+
Retailer 7
-
$833 AUD
$585 USD
View
B+
Retailer 8
-
$841 AUD
$591 USD
View
B+
Retailer 9
-
$876 AUD
$615 USD
View
B
Retailer 10
-
$1,236 AUD
$869 USD
View
Retailer 11
-
$1,488 AUD
$1,045 USD
View
Price last confirmed 11 days ago
B
Retailer 12
-
$1,689 AUD
£934 GBP
View
B
Retailer 13
-
$1,720 AUD
$1,208 USD
View
Most Expensive
B
Brilliant Earth
10789091A · Oct 31
$2,135 AUD
$1,500 USD
View
13 more retailers have this diamond
Prices start from $325 AUDSave up to $1,811 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
1.67ct Cushion
$325 AUD