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Cushion|Lab Grown|IGI

1.70ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG578353174

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG578353174

Diamond specifications and retailer prices

From $2,640 AUD
$1,850 USD
As of October 27, 2026
5 retailers carry this diamond
Most expensive: $2,640 AUD at Do Amore Diamonds
View at Do Amore Diamonds

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 LG578353174 or 578353174. Listed at 5 retailers as of October 27, 2026. 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
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle38.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG578353174
Dimensions7.83 × 6.46 × 4.41 mm
L/W Ratio1.21
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.83 mm6.46 mm1.70 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG578353174
Side View
Table 58.0%Crown 34.2°Girdle: THN-STKPavilion 38.9°Culet: NoneDepth 68.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 27
Current: $2,640 AUD|Low: $220 AUD|High: $2,797 AUD|Avg: $1,195 AUD|-5.6%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 25, 2026
Retailer 6$327 AUD
Retailer 3$595 AUD
Retailer 8$651 AUD
Retailer 9$795 AUD
Retailer 7$1,103 AUD
Retailer 4$1,183 AUD
Retailer 2$1,511 AUD
Retailer 5$1,712 AUD
Do Amore Diamonds$2,640 AUD

15 data points across 9 retailers

5 retailers

Retailer 1
-
$595 AUD
$417 USD
Price last confirmed 8 days ago
Retailer 2
-
$1,183 AUD
$829 USD
View
Price last confirmed 7 days ago
Retailer 3
-
$1,511 AUD
£834 GBP
View
Price last confirmed 9 days ago
Retailer 4
-
$1,712 AUD
$1,200 USD
View
Price last confirmed 7 days ago
Most Expensive
B
Do Amore Diamonds
27-6B70F40E5 · Oct 27
$2,640 AUD
$1,850 USD
View
4 more retailers have this diamond

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
$2,640 AUD