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Cushion|Lab Grown|IGI

1.70ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG12747720

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG12747720

Diamond specifications and retailer prices

From $1,072 AUD
CA$1,043 CAD
As of November 2, 2026
Save $345 AUD (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,417 AUD at The Diamond Guys · As of November 3, 2026
View at The Diamond Guys

About this 1.7ct lab-grown cushion diamond

This 1.7ct 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 LG12747720 or 12747720. Listed at 2 retailers as of November 2, 2026, with prices from $1,072 to $1,417, a $345 spread on the same certified stone. The Diamond Guys lists it at $1,417. 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

1.70
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12747720
Dimensions6.85 × 6.57 × 4.48 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
6.85 mm6.57 mm1.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG12747720
Side View
Table 62.0%Crown 34°Girdle: THK-UNDPavilion 37.6°Culet: NoneDepth 68.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $675 AUD|Low: $294 AUD|High: $1,941 AUD|Avg: $1,080 AUD|-25.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
The Diamond Guys
September 18, 2026
Retailer 2$566 AUD
Retailer 4$628 AUD
Retailer 1$675 AUD
Retailer 6$685 AUD
Retailer 5$823 AUD
Retailer 3$1,072 AUD
The Diamond Guys$1,417 AUD

70 data points across 7 retailers

2 retailers$1,072 AUD to $1,417 AUD

B+
Cheapest Retailer
-
$1,072 AUD
CA$1,043 CAD
Most Expensive
B
The Diamond Guys
1779253350 · Nov 3
$1,417 AUD
$993 USD
View
1 more retailer has this diamond
Prices start from $1,072 AUDSave up to $345 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.

B+
1.70ct Cushion
$1,072 AUD