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Cushion|Lab Grown|IGI

1.67ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG12745718

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG12745718

Diamond specifications and retailer prices

From $808 USD
CA$1,123 CAD
As of November 2, 2026
Save $261 USD (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,069 USD at The Diamond Guys · As of November 3, 2026
View at The Diamond Guys

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12745718 or 12745718. Listed at 2 retailers as of November 2, 2026, with prices from $808 to $1,069, a $261 spread on the same certified stone. The Diamond Guys lists it at $1,069. 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
F
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle34.5°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12745718
Dimensions6.89 × 6.61 × 4.54 mm
L/W Ratio1.04
Culet sizePointed
Cert comments
As Grown - No indications of post-growth treatment. This Laboratory Grown Diamond was created by High Pressure High Tempertature (HPHT) growth process.
Top View
6.89 mm6.61 mm1.67 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI LG12745718
Side View
Table 60.0%Crown 34.5°Girdle: THK-UNDPavilion 38.4°Culet: NoneDepth 68.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: $509 USD|Low: $203 USD|High: $1,336 USD|Avg: $815 USD|-18.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
The Diamond Guys
September 18, 2026
Retailer 2$419 USD
Retailer 4$429 USD
Retailer 7$475 USD
Retailer 1$509 USD
Retailer 5$594 USD
Retailer 3$808 USD
The Diamond Guys$1,069 USD
Retailer 6$1,087 USD

74 data points across 8 retailers

2 retailers$808 USD to $1,069 USD

B+
Cheapest Retailer
-
$808 USD
CA$1,123 CAD
Most Expensive
B
The Diamond Guys
1779252969 · Nov 3
$1,069 USD
View
1 more retailer has this diamond
Prices start from $808 USDSave up to $261 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.

B+
1.67ct Cushion
$808 USD