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Cushion|Lab Grown|IGI

1.67ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG533220807

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG533220807

Diamond specifications and retailer prices

From $304 USD
As of October 30, 2026
Save $1,286 USD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,590 USD at Brilliant Earth · As of October 29, 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 top-tier cut grade and certified by IGI LG533220807 or 533220807. Listed at 14 retailers as of October 29, 2026, with prices from $304 to $1,590, a $1,286 spread on the same certified stone. Brilliant Earth lists it at $1,590. 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

1.67
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG533220807
Dimensions6.98 × 6.95 × 4.56 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
6.98 mm6.95 mm1.67 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG533220807
Side View
Table 61.0%Crown 36.3°Girdle: MED-STKPavilion 39.7°Culet: NoneDepth 65.6%

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: $1,590 USD|Low: $300 USD|High: $1,610 USD|Avg: $707 USD|-1.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 3$304 USD
Retailer 12$336 USD
Retailer 7$375 USD
Retailer 11$450 USD
Retailer 6$495 USD
Retailer 5$591 USD
Retailer 2$597 USD
Retailer 4$604 USD
Retailer 10$852 USD
Retailer 9$1,075 USD
Retailer 8$1,354 USD
Brilliant Earth$1,590 USD

41 data points across 12 retailers

14 retailers$304 USD to $1,590 USD

A
Cheapest Retailer
-
$304 USD
Final sale: no returns
A
Retailer 2
-
$336 USD
View
A
Retailer 3
-
$375 USD
£295 GBP
View
B+
Retailer 4
-
$450 USD
View
A
Retailer 5
-
$495 USD
View
A
Retailer 6
-
$591 USD
£465 GBP
View
A
Retailer 7
-
$597 USD
€569 EUR
View
B+
Retailer 8
-
$604 USD
View
B+
Retailer 9
-
$608 USD
View
B+
Retailer 10
-
$852 USD
View
Retailer 11
-
$1,075 USD
View
Price last confirmed 10 days ago
B
Retailer 12
-
$1,131 USD
View
B
Retailer 13
-
$1,354 USD
£1,066 GBP
View
Most Expensive
B
Brilliant Earth
11226141A · Oct 29
$1,590 USD
View
13 more retailers have this diamond
Prices start from $304 USDSave up to $1,286 USD

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
$304 USD