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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 $1,474 NZD
$829 USD
As of October 27, 2026
Save $1,814 NZD (55%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $3,288 NZD at Do Amore Diamonds · As of October 27, 2026
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, with prices from $1,474 to $3,288, a $1,814 spread on the same certified stone. Do Amore Diamonds lists it at $3,288. 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

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: Oct 27
Current: $3,288 NZD|Low: $274 NZD|High: $3,484 NZD|Avg: $1,489 NZD|-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$407 NZD
Retailer 3$741 NZD
Retailer 8$811 NZD
Retailer 9$990 NZD
Retailer 7$1,374 NZD
Retailer 4$1,474 NZD
Retailer 2$1,882 NZD
Retailer 5$2,133 NZD
Do Amore Diamonds$3,288 NZD

15 data points across 9 retailers

5 retailers$1,474 NZD to $3,288 NZD

Retailer 1
-
$741 NZD
$417 USD
Price last confirmed 8 days ago
B+
Retailer 2
-
$1,474 NZD
$829 USD
View
Retailer 3
-
$1,882 NZD
£834 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
$2,133 NZD
$1,200 USD
View
Price last confirmed 7 days ago
Most Expensive
B
Do Amore Diamonds
27-6B70F40E5 · Oct 27
$3,288 NZD
$1,850 USD
View
4 more retailers have this diamond
Prices start from $1,474 NZDSave up to $1,814 NZD

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
$1,474 NZD