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Cushion|Lab Grown|IGI

1.89ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG816679704

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG816679704

Diamond specifications and retailer prices

From $964 AUD
$677 USD
As of October 28, 2026
Save $3,178 AUD (77%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,608 AUD at Brilliant Earth · As of September 23, 2026
View at Brilliant Earth

About this 1.89ct lab-grown cushion diamond

This 1.89ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816679704 or 816679704. Listed at 6 retailers as of October 28, 2026, with a 330% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.89
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle27.2°
Pavilion angle32.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816679704
Dimensions8.81 × 6.30 × 4.07 mm
L/W Ratio1.40
Girdle conditionFaceted
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
8.81 mm6.30 mm1.89 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816679704
Side View
Table 59.0%Crown 27.2°Girdle: MED-THKPavilion 32.1°Culet: NoneDepth 64.6%

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: $5,608 AUD|Low: $964 AUD|High: $5,608 AUD|Avg: $2,563 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 4$964 AUD
Retailer 3$984 AUD
Retailer 5$1,663 AUD
Retailer 2$2,410 AUD
Retailer 6$4,142 AUD
Brilliant Earth$5,608 AUD

23 data points across 6 retailers

6 retailers$964 AUD to $4,142 AUD

A
Cheapest Retailer
-
$964 AUD
$677 USD
A
Retailer 2
-
$984 AUD
$691 USD
View
A
Retailer 3
-
$1,663 AUD
$1,168 USD
View
A
Retailer 4
-
$2,410 AUD
£1,333 GBP
View
B
Retailer 5
-
$4,142 AUD
$2,910 USD
View
Most Expensive
Brilliant Earth
20575036A · Sep 23
$5,608 AUD
$3,940 USD
View
Price last confirmed 36 days ago
5 more retailers have this diamond
Prices start from $964 AUDSave up to $3,178 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
1.89ct Cushion
$964 AUD