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Cushion|Lab Grown|IGI

1.70ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG478107116

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG478107116

Diamond specifications and retailer prices

From $673 AUD
$473 USD
As of October 27, 2026
Save $2,776 AUD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $4,896 AUD at Do Amore Diamonds · As of October 29, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG478107116 or 478107116. Listed at 12 retailers as of October 27, 2026, with a 412% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478107116
Dimensions7.27 × 6.63 × 4.54 mm
L/W Ratio1.10
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
7.27 mm6.63 mm1.70 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478107116
Side View
Table 62.0%Crown 35.2°Girdle: MED-THKPavilion 40.1°Culet: NoneDepth 68.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $4,896 AUD|Low: $685 AUD|High: $4,896 AUD|Avg: $1,872 AUD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 8$685 AUD
Retailer 4$972 AUD
Retailer 10$1,042 AUD
Retailer 9$1,087 AUD
Retailer 2$1,242 AUD
Retailer 6$1,601 AUD
Retailer 7$2,747 AUD
Retailer 3$2,789 AUD
Retailer 5$3,449 AUD
Do Amore Diamonds$4,896 AUD

43 data points across 10 retailers

12 retailers$673 AUD to $3,449 AUD

A
Cheapest Retailer
-
$673 AUD
$473 USD
A
Retailer 2
-
$685 AUD
$481 USD
View
A
Retailer 3
-
$897 AUD
$630 USD
View
A
Retailer 4
-
$972 AUD
£538 GBP
View
B+
Retailer 5
-
$1,042 AUD
$732 USD
View
B+
Retailer 6
-
$1,087 AUD
$764 USD
View
B+
Retailer 7
-
$1,242 AUD
£687 GBP
View
B+
Retailer 8
-
$1,601 AUD
$1,125 USD
View
Price last confirmed 8 days ago
B
Retailer 9
-
$2,747 AUD
$1,930 USD
View
B
Retailer 10
-
$2,789 AUD
£1,543 GBP
View
B
Retailer 11
-
$3,449 AUD
CA$3,366 CAD
View
Most Expensive
B
Do Amore Diamonds
27-531204799 · Oct 29
$4,896 AUD
$3,440 USD
View
Price under review
11 more retailers have this diamond
Prices start from $673 AUDSave up to $2,776 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.

A
1.70ct Cushion
$673 AUD