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Cushion|Lab Grown|IGI

1.70ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG600340947

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG600340947

Diamond specifications and retailer prices

From $330 AUD
$232 USD
As of October 28, 2026
Save $2,246 AUD (87%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,576 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 LG600340947 or 600340947. Listed at 12 retailers as of October 28, 2026, with prices from $330 to $2,576, a $2,246 spread on the same certified stone. Brilliant Earth lists it at $2,576. 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°
Pavilion angle32.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG600340947
Dimensions7.30 × 6.55 × 4.31 mm
L/W Ratio1.11
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
7.30 mm6.55 mm1.70 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG600340947
Side View
Table 59.0%Crown 35°Girdle: STK-THKPavilion 32.2°Culet: NoneDepth 65.8%

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 28
Current: $676 AUD|Low: $330 AUD|High: $1,734 AUD|Avg: $885 AUD|+4.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 9$330 AUD
Retailer 10$419 AUD
Retailer 5$472 AUD
Retailer 7$495 AUD
Retailer 1$676 AUD
Retailer 11$742 AUD
Retailer 12$791 AUD
Retailer 4$983 AUD
Retailer 2$1,191 AUD
Retailer 3$1,254 AUD
Retailer 6$1,477 AUD
Retailer 8$1,734 AUD

39 data points across 12 retailers

12 retailers$330 AUD to $2,576 AUD

A
Cheapest Retailer
-
$330 AUD
$232 USD
Final sale: no returns
A
Retailer 2
-
$419 AUD
HK$2,300 HKD
View
A
Retailer 3
-
$472 AUD
£261 GBP
View
B+
Retailer 4
-
$495 AUD
$348 USD
View
A
Retailer 5
-
$676 AUD
£374 GBP
View
A
Retailer 6
-
$742 AUD
$521 USD
View
A
Retailer 7
-
$791 AUD
$556 USD
View
B+
Retailer 8
-
$1,191 AUD
SGD 1,131 SGD
View
B+
Retailer 9
-
$1,254 AUD
$881 USD
View
B+
Retailer 10
-
$1,477 AUD
£817 GBP
View
B
Retailer 11
-
$1,734 AUD
$1,218 USD
View
Most Expensive
B
Brilliant Earth
22273641A · Oct 29
$2,576 AUD
$1,810 USD
View
11 more retailers have this diamond
Prices start from $330 AUDSave up to $2,246 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
$330 AUD