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Cushion|Lab Grown|IGI

1.65ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG485151098

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG485151098

Diamond specifications and retailer prices

From $296 AUD
$208 USD
As of October 28, 2026
Save $2,238 AUD (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,534 AUD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.65ct lab-grown cushion diamond

This 1.65ct 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 LG485151098 or 485151098. Listed at 14 retailers as of October 28, 2026, with prices from $296 to $2,534, a $2,238 spread on the same certified stone. Do Amore Diamonds lists it at $2,534. 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

1.65
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485151098
Dimensions7.48 × 6.52 × 4.41 mm
L/W Ratio1.15
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
7.48 mm6.52 mm1.65 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485151098
Side View
Table 62.5%Crown 35.4°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 67.6%

Caratlytics Score

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

Price History

Last verified: Oct 28
Current: $665 AUD|Low: $296 AUD|High: $2,747 AUD|Avg: $948 AUD|+4.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 9$296 AUD
Retailer 7$327 AUD
Retailer 2$441 AUD
Retailer 3$592 AUD
Retailer 1$665 AUD
Retailer 10$810 AUD
Retailer 5$1,231 AUD
Retailer 8$1,341 AUD
Retailer 4$1,692 AUD
Retailer 6$1,737 AUD

42 data points across 10 retailers

14 retailers$296 AUD to $2,534 AUD

A
Cheapest Retailer
-
$296 AUD
$208 USD
Final sale: no returns
A
Retailer 2
-
$327 AUD
$230 USD
View
B+
Retailer 3
-
$441 AUD
$310 USD
View
A
Retailer 4
-
$592 AUD
€396 EUR
View
A
Retailer 5
-
$601 AUD
$422 USD
View
A
Retailer 6
-
$665 AUD
£368 GBP
View
A
Retailer 7
-
$810 AUD
$569 USD
View
B+
Retailer 8
-
$1,219 AUD
$856 USD
View
Retailer 9
-
$1,231 AUD
$865 USD
View
Price last confirmed 8 days ago
Retailer 10
-
$1,303 AUD
$915 USD
View
Price last confirmed 109 days ago
B+
Retailer 11
-
$1,341 AUD
$942 USD
View
B
Retailer 12
-
$1,692 AUD
£936 GBP
View
B
Retailer 13
-
$1,737 AUD
$1,220 USD
View
Most Expensive
B
Do Amore Diamonds
27-D3AE044AA · Oct 29
$2,534 AUD
$1,780 USD
View
13 more retailers have this diamond
Prices start from $296 AUDSave up to $2,238 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
1.65ct Cushion
$296 AUD