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Cushion|Lab Grown|IGI

1.80ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG587384143

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG587384143

Diamond specifications and retailer prices

From $394 AUD
$277 USD
As of October 28, 2026
Save $3,449 AUD (90%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,843 AUD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.8ct lab-grown cushion diamond

This 1.8ct 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 LG587384143 or 587384143. Listed at 17 retailers as of October 28, 2026, with prices from $394 to $3,843, a $3,449 spread on the same certified stone. Do Amore Diamonds lists it at $3,843. 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

1.80
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG587384143
Dimensions7.22 × 6.92 × 4.64 mm
L/W Ratio1.04
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
7.22 mm6.92 mm1.80 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG587384143
Side View
Table 62.0%Crown 35°Girdle: MED-THKPavilion 38.7°Culet: NoneDepth 67.1%

Caratlytics Score

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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: $3,843 AUD|Low: $394 AUD|High: $3,843 AUD|Avg: $1,309 AUD|+13.9%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 29, 2026
Retailer 5$394 AUD
Retailer 9$535 AUD
Retailer 7$712 AUD
Retailer 10$712 AUD
Retailer 6$761 AUD
Retailer 11$783 AUD
Retailer 2$1,056 AUD
Retailer 4$1,417 AUD
Retailer 3$1,747 AUD
Retailer 12$2,129 AUD
Retailer 13$2,177 AUD
Retailer 8$2,374 AUD
Do Amore Diamonds$3,843 AUD

40 data points across 13 retailers

17 retailers$394 AUD to $3,843 AUD

A
Cheapest Retailer
-
$394 AUD
$277 USD
Final sale: no returns
A
Retailer 2
-
$535 AUD
$376 USD
View
A
Retailer 3
-
$618 AUD
£342 GBP
View
Price last confirmed 36 days ago
A
Retailer 4
-
$712 AUD
$500 USD
View
A
Retailer 5
-
$712 AUD
$500 USD
View
A
Retailer 6
-
$761 AUD
£421 GBP
View
A
Retailer 7
-
$783 AUD
$550 USD
View
B+
Retailer 8
-
$1,056 AUD
£584 GBP
View
B+
Retailer 9
-
$1,417 AUD
$995 USD
View
B
Retailer 10
-
$1,551 AUD
$1,089 USD
View
Price last confirmed 63 days ago
B
Retailer 11
-
$1,649 AUD
CA$1,609 CAD
View
B
Retailer 12
-
$1,747 AUD
$1,227 USD
View
B
Retailer 13
-
$2,129 AUD
$1,496 USD
View
B
Retailer 14
-
$2,177 AUD
SGD 2,067 SGD
View
B
Retailer 15
-
$2,374 AUD
£1,313 GBP
View
B
Retailer 16
-
$3,317 AUD
$2,330 USD
View
Price last confirmed 28 days ago
Most Expensive
B
Do Amore Diamonds
27-70838E392 · Oct 29
$3,843 AUD
$2,700 USD
View
16 more retailers have this diamond
Prices start from $394 AUDSave up to $3,449 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
1.80ct Cushion
$394 AUD